diff --git a/Cargo.lock b/Cargo.lock
index c7daf071..a4fd1535 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -520,7 +520,7 @@ dependencies = [
  "futures-lite 2.2.0",
  "parking",
  "polling 3.3.2",
- "rustix 0.38.30",
+ "rustix 0.38.31",
  "slab",
  "tracing",
  "windows-sys 0.52.0",
@@ -1210,7 +1210,7 @@ checksum = "25cbce373ec4653f1a01a31e8a5e5ec0c622dc27ff9c4e6606eefef5cbbed4a5"
 
 [[package]]
 name = "ffplayout"
-version = "0.20.4"
+version = "0.20.4-beta1"
 dependencies = [
  "chrono",
  "clap",
@@ -1232,7 +1232,7 @@ dependencies = [
 
 [[package]]
 name = "ffplayout-api"
-version = "0.20.4"
+version = "0.20.4-beta1"
 dependencies = [
  "actix-files",
  "actix-multipart",
@@ -1271,7 +1271,7 @@ dependencies = [
 
 [[package]]
 name = "ffplayout-lib"
-version = "0.20.4"
+version = "0.20.4-beta1"
 dependencies = [
  "chrono",
  "crossbeam-channel",
@@ -1767,9 +1767,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.2.1"
+version = "2.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "433de089bd45971eecf4668ee0ee8f4cec17db4f8bd8f7bc3197a6ce37aa7d9b"
+checksum = "824b2ae422412366ba479e8111fd301f7b5faece8149317bb81925979a53f520"
 dependencies = [
  "equivalent",
  "hashbrown",
@@ -1949,9 +1949,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.152"
+version = "0.2.153"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13e3bf6590cbc649f4d1a3eefc9d5d6eb746f5200ffb04e5e142700b8faa56e7"
+checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
 
 [[package]]
 name = "libm"
@@ -2204,6 +2204,12 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "num-conv"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
+
 [[package]]
 name = "num-integer"
 version = "0.1.45"
@@ -2448,7 +2454,7 @@ dependencies = [
  "cfg-if",
  "concurrent-queue",
  "pin-project-lite",
- "rustix 0.38.30",
+ "rustix 0.38.31",
  "tracing",
  "windows-sys 0.52.0",
 ]
@@ -2606,9 +2612,9 @@ checksum = "e898588f33fdd5b9420719948f9f2a32c922a246964576f71ba7f24f80610fbc"
 
 [[package]]
 name = "reqwest"
-version = "0.11.23"
+version = "0.11.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37b1ae8d9ac08420c66222fb9096fc5de435c3c48542bc5336c51892cffafb41"
+checksum = "c6920094eb85afde5e4a138be3f2de8bbdf28000f0029e72c45025a56b042251"
 dependencies = [
  "base64",
  "bytes",
@@ -2632,6 +2638,7 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_urlencoded",
+ "sync_wrapper",
  "system-configuration",
  "tokio",
  "tokio-rustls",
@@ -2730,9 +2737,9 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.38.30"
+version = "0.38.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "322394588aaf33c24007e8bb3238ee3e4c5c09c084ab32bc73890b99ff326bca"
+checksum = "6ea3e1a662af26cd7a3ba09c0297a31af215563ecf42817c98df621387f4e949"
 dependencies = [
  "bitflags 2.4.2",
  "errno",
@@ -3363,6 +3370,12 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "sync_wrapper"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2047c6ded9c721764247e62cd3b03c09ffc529b2ba5b10ec482ae507a4a70160"
+
 [[package]]
 name = "sysinfo"
 version = "0.30.5"
@@ -3408,7 +3421,7 @@ dependencies = [
  "cfg-if",
  "fastrand 2.0.1",
  "redox_syscall",
- "rustix 0.38.30",
+ "rustix 0.38.31",
  "windows-sys 0.52.0",
 ]
 
@@ -3423,7 +3436,7 @@ dependencies = [
 
 [[package]]
 name = "tests"
-version = "0.20.4"
+version = "0.20.4-beta1"
 dependencies = [
  "chrono",
  "crossbeam-channel",
@@ -3468,13 +3481,14 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f657ba42c3f86e7680e53c8cd3af8abbe56b5491790b46e22e19c0d57463583e"
+checksum = "fe80ced77cbfb4cb91a94bf72b378b4b6791a0d9b7f09d0be747d1bdff4e68bd"
 dependencies = [
  "deranged",
  "itoa",
  "libc",
+ "num-conv",
  "num_threads",
  "powerfmt",
  "serde",
@@ -3490,10 +3504,11 @@ checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
 
 [[package]]
 name = "time-macros"
-version = "0.2.16"
+version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26197e33420244aeb70c3e8c78376ca46571bc4e701e4791c2cd9f57dcb3a43f"
+checksum = "7ba3a3ef41e6672a2f0f001392bb5dcd3ff0a9992d618ca761a11c3121547774"
 dependencies = [
+ "num-conv",
  "time-core",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index d049b333..7bfccb56 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ default-members = ["ffplayout-api", "ffplayout-engine", "tests"]
 resolver = "2"
 
 [workspace.package]
-version = "0.20.4"
+version = "0.20.4-beta1"
 license = "GPL-3.0"
 repository = "https://github.com/ffplayout/ffplayout"
 authors = ["Jonathan Baecker <jonbae77@gmail.com>"]
diff --git a/ffplayout-engine/src/input/playlist.rs b/ffplayout-engine/src/input/playlist.rs
index 1a9f5284..117d0292 100644
--- a/ffplayout-engine/src/input/playlist.rs
+++ b/ffplayout-engine/src/input/playlist.rs
@@ -11,9 +11,9 @@ use serde_json::json;
 use simplelog::*;
 
 use ffplayout_lib::utils::{
-    controller::PlayerControl, gen_dummy, get_delta, get_sec, is_close, is_remote,
-    json_serializer::read_json, loop_filler, loop_image, modified_time, seek_and_length, Media,
-    MediaProbe, PlayoutConfig, PlayoutStatus, DUMMY_LEN, IMAGE_FORMAT,
+    controller::PlayerControl, gen_dummy, get_delta, is_close, is_remote,
+    json_serializer::read_json, loop_filler, loop_image, modified_time, seek_and_length,
+    time_in_seconds, Media, MediaProbe, PlayoutConfig, PlayoutStatus, IMAGE_FORMAT,
 };
 
 /// Struct for current playlist.
@@ -23,6 +23,7 @@ use ffplayout_lib::utils::{
 pub struct CurrentProgram {
     config: PlayoutConfig,
     start_sec: f64,
+    end_sec: f64,
     json_mod: Option<String>,
     json_path: Option<String>,
     json_date: String,
@@ -30,6 +31,8 @@ pub struct CurrentProgram {
     current_node: Media,
     is_terminated: Arc<AtomicBool>,
     playout_stat: PlayoutStatus,
+    last_json_path: Option<String>,
+    last_node_ad: bool,
 }
 
 /// Prepare a playlist iterator.
@@ -40,125 +43,81 @@ impl CurrentProgram {
         is_terminated: Arc<AtomicBool>,
         player_control: &PlayerControl,
     ) -> Self {
-        let json = read_json(
-            config,
-            player_control,
-            None,
-            is_terminated.clone(),
-            true,
-            false,
-        );
-
-        if let Some(file) = &json.current_file {
-            info!("Read Playlist: <b><magenta>{}</></b>", file);
-        }
-
-        *player_control.current_list.lock().unwrap() = json.program;
-        *playout_stat.current_date.lock().unwrap() = json.date.clone();
-
-        if *playout_stat.date.lock().unwrap() != json.date {
-            let data = json!({
-                "time_shift": 0.0,
-                "date": json.date,
-            });
-
-            let json: String = serde_json::to_string(&data).expect("Serialize status data failed");
-            if let Err(e) = fs::write(config.general.stat_file.clone(), json) {
-                error!("Unable to write status file: {e}");
-            };
-        }
-
         Self {
             config: config.clone(),
-            start_sec: json.start_sec.unwrap(),
-            json_mod: json.modified,
-            json_path: json.current_file,
-            json_date: json.date,
+            start_sec: config.playlist.start_sec.unwrap(),
+            end_sec: config.playlist.length_sec.unwrap(),
+            json_mod: None,
+            json_path: None,
+            json_date: String::new(),
             player_control: player_control.clone(),
             current_node: Media::new(0, "", false),
             is_terminated,
             playout_stat,
+            last_json_path: None,
+            last_node_ad: false,
         }
     }
 
     // Check if playlist file got updated, and when yes we reload it and setup everything in place.
-    fn check_update(&mut self, seek: bool) {
-        if self.json_path.is_none() {
-            // If the playlist was missing, we check here to see if it came back.
+    fn load_or_update_playlist(&mut self, seek: bool) {
+        let mut get_current = false;
+        let mut reload = false;
+
+        if let Some(path) = self.json_path.clone() {
+            if (Path::new(&path).is_file() || is_remote(&path))
+                && self.json_mod != modified_time(&path)
+            {
+                info!("Reload playlist <b><magenta>{path}</></b>");
+                self.playout_stat.list_init.store(true, Ordering::SeqCst);
+                get_current = true;
+                reload = true;
+            }
+        } else {
+            get_current = true;
+        }
+
+        if get_current {
             let json = read_json(
                 &self.config,
                 &self.player_control,
-                None,
+                self.json_path.clone(),
                 self.is_terminated.clone(),
                 seek,
                 false,
             );
 
-            if let Some(file) = &json.current_file {
-                info!("Read Playlist: <b><magenta>{file}</></b>");
+            if !reload {
+                if let Some(file) = &json.current_file {
+                    info!("Read playlist: <b><magenta>{file}</></b>");
+                }
             }
 
             self.json_path = json.current_file;
             self.json_mod = json.modified;
             *self.player_control.current_list.lock().unwrap() = json.program;
-        } else if Path::new(&self.json_path.clone().unwrap()).is_file()
-            || is_remote(&self.json_path.clone().unwrap())
-        {
-            // If the playlist exists, we check here if it has been modified.
-            let mod_time = modified_time(&self.json_path.clone().unwrap());
 
-            if self.json_mod != mod_time {
-                // when playlist has changed, reload it
-                info!(
-                    "Reload playlist <b><magenta>{}</></b>",
-                    self.json_path.clone().unwrap()
-                );
-
-                let json = read_json(
-                    &self.config,
-                    &self.player_control,
-                    self.json_path.clone(),
-                    self.is_terminated.clone(),
-                    false,
-                    false,
-                );
-
-                self.json_mod = json.modified;
-                *self.player_control.current_list.lock().unwrap() = json.program;
+            if self.json_path.is_none() {
+                trace!("missing playlist");
 
+                self.current_node = Media::new(0, "", false);
                 self.playout_stat.list_init.store(true, Ordering::SeqCst);
+                self.player_control.current_index.store(0, Ordering::SeqCst);
             }
-        } else {
-            // If the playlist disappears after normal run, we end up here.
-            trace!("check_update, missing playlist");
-            error!(
-                "Playlist <b><magenta>{}</></b> not exist!",
-                self.json_path.clone().unwrap()
-            );
-
-            let media = Media::new(0, "", false);
-
-            self.json_mod = None;
-            self.json_path = None;
-            self.current_node = media.clone();
-            self.playout_stat.list_init.store(true, Ordering::SeqCst);
-            self.player_control.current_index.store(0, Ordering::SeqCst);
-            *self.player_control.current_list.lock().unwrap() = vec![media];
         }
     }
 
     // Check if day is past and it is time for a new playlist.
-    fn check_for_next_playlist(&mut self) -> bool {
-        let current_time = get_sec();
-        let start_sec = self.config.playlist.start_sec.unwrap();
-        let target_length = self.config.playlist.length_sec.unwrap();
-        let (delta, total_delta) = get_delta(&self.config, &current_time);
-        let mut duration = self.current_node.out;
+    fn check_for_playlist(&mut self, seek: bool) -> bool {
+        let (delta, total_delta) = get_delta(&self.config, &time_in_seconds());
         let mut next = false;
 
-        if self.current_node.duration > self.current_node.out {
-            duration = self.current_node.duration
-        }
+        let duration = if self.current_node.duration >= self.current_node.out {
+            self.current_node.duration
+        } else {
+            // maybe out is longer to be able to loop
+            self.current_node.out
+        };
 
         trace!(
             "delta: {delta}, total_delta: {total_delta}, current index: {}",
@@ -166,7 +125,7 @@ impl CurrentProgram {
         );
 
         let mut next_start =
-            self.current_node.begin.unwrap_or_default() - start_sec + duration + delta;
+            self.current_node.begin.unwrap_or_default() - self.start_sec + duration + delta;
 
         if self.player_control.current_index.load(Ordering::SeqCst)
             == self.player_control.current_list.lock().unwrap().len() - 1
@@ -174,12 +133,12 @@ impl CurrentProgram {
             next_start += self.config.general.stop_threshold;
         }
 
-        trace!("next_start: {next_start}, target_length: {target_length}");
+        trace!("next_start: {next_start}, end_sec: {}", self.end_sec);
 
         // Check if we over the target length or we are close to it, if so we load the next playlist.
-        if next_start >= target_length
+        if next_start >= self.end_sec
             || is_close(total_delta, 0.0, 2.0)
-            || is_close(total_delta, target_length, 2.0)
+            || is_close(total_delta, self.end_sec, 2.0)
         {
             trace!("get next day");
             next = true;
@@ -194,60 +153,62 @@ impl CurrentProgram {
             );
 
             if let Some(file) = &json.current_file {
-                info!("Read next Playlist: <b><magenta>{}</></b>", file);
+                info!("Read next playlist: <b><magenta>{file}</></b>");
             }
 
-            let data = json!({
-                "time_shift": 0.0,
-                "date": json.date,
-            });
-
-            *self.playout_stat.current_date.lock().unwrap() = json.date.clone();
-            *self.playout_stat.time_shift.lock().unwrap() = 0.0;
-            let status_data: String =
-                serde_json::to_string(&data).expect("Serialize status data failed");
-
-            if let Err(e) = fs::write(self.config.general.stat_file.clone(), status_data) {
-                error!("Unable to write status file: {e}");
-            };
+            self.playout_stat.list_init.store(false, Ordering::SeqCst);
+            self.set_status(json.date.clone());
 
             self.json_path = json.current_file.clone();
             self.json_mod = json.modified;
             self.json_date = json.date;
+
             *self.player_control.current_list.lock().unwrap() = json.program;
             self.player_control.current_index.store(0, Ordering::SeqCst);
-
-            if json.current_file.is_none() {
-                self.playout_stat.list_init.store(true, Ordering::SeqCst);
-            } else {
-                self.playout_stat.list_init.store(false, Ordering::SeqCst);
-            }
+        } else {
+            self.load_or_update_playlist(seek)
         }
 
         next
     }
 
+    fn set_status(&mut self, date: String) {
+        *self.playout_stat.current_date.lock().unwrap() = date.clone();
+        *self.playout_stat.time_shift.lock().unwrap() = 0.0;
+
+        if let Err(e) = fs::write(
+            &self.config.general.stat_file,
+            serde_json::to_string(&json!({
+                "time_shift": 0.0,
+                "date": date,
+            }))
+            .unwrap(),
+        ) {
+            error!("Unable to write status file: {e}");
+        };
+    }
+
     // Check if last and/or next clip is a advertisement.
     fn last_next_ad(&mut self) {
         let index = self.player_control.current_index.load(Ordering::SeqCst);
         let current_list = self.player_control.current_list.lock().unwrap();
 
         if index + 1 < current_list.len() && &current_list[index + 1].category == "advertisement" {
-            self.current_node.next_ad = Some(true);
+            self.current_node.next_ad = true;
         }
 
         if index > 0
             && index < current_list.len()
             && &current_list[index - 1].category == "advertisement"
         {
-            self.current_node.last_ad = Some(true);
+            self.current_node.last_ad = true;
         }
     }
 
     // Get current time and when we are before start time,
     // we add full seconds of a day to it.
     fn get_current_time(&mut self) -> f64 {
-        let mut time_sec = get_sec();
+        let mut time_sec = time_in_seconds();
 
         if time_sec < self.start_sec {
             time_sec += self.config.playlist.length_sec.unwrap()
@@ -304,6 +265,8 @@ impl CurrentProgram {
             // de-instance node to preserve original values in list
             let mut node_clone = nodes[index].clone();
 
+            trace!("Clip from init: {}", node_clone.source);
+
             // Important! When no manual drop is happen here, lock is still active in handle_list_init
             drop(nodes);
 
@@ -329,6 +292,39 @@ impl CurrentProgram {
 
         is_filler
     }
+
+    fn fill_end(&mut self, total_delta: f64) {
+        // Fill end from playlist
+
+        let index = self.player_control.current_index.load(Ordering::SeqCst);
+        let mut media = Media::new(index, "", false);
+        media.begin = Some(time_in_seconds());
+        media.duration = total_delta;
+        media.out = total_delta;
+
+        self.current_node = gen_source(
+            &self.config,
+            media,
+            &self.playout_stat,
+            &self.player_control,
+            0,
+        );
+
+        self.player_control
+            .current_list
+            .lock()
+            .unwrap()
+            .push(self.current_node.clone());
+        self.last_next_ad();
+
+        self.current_node.last_ad = self.last_node_ad;
+        self.current_node
+            .add_filter(&self.config, &self.playout_stat.chain);
+
+        self.player_control
+            .current_index
+            .fetch_add(1, Ordering::SeqCst);
+    }
 }
 
 /// Build the playlist iterator
@@ -336,7 +332,9 @@ impl Iterator for CurrentProgram {
     type Item = Media;
 
     fn next(&mut self) -> Option<Self::Item> {
-        self.check_update(self.playout_stat.list_init.load(Ordering::SeqCst));
+        self.last_json_path = self.json_path.clone();
+        self.last_node_ad = self.current_node.last_ad;
+        self.check_for_playlist(self.playout_stat.list_init.load(Ordering::SeqCst));
 
         if self.playout_stat.list_init.load(Ordering::SeqCst) {
             trace!("Init playlist, from next iterator");
@@ -346,118 +344,37 @@ impl Iterator for CurrentProgram {
                 init_clip_is_filler = self.init_clip();
             }
 
-            if self.playout_stat.list_init.load(Ordering::SeqCst) {
-                // On init load, playlist could be not long enough,
-                // so we check if we can take the next playlist already,
-                // or we fill the gap with a dummy.
+            if self.playout_stat.list_init.load(Ordering::SeqCst) && !init_clip_is_filler {
+                // On init load, playlist could be not long enough, or clips are not found
+                // so we fill the gap with a dummy.
+                trace!("Init clip is no filler");
 
-                let (last_index, new_length) = if let Ok(c_list) =
-                    self.player_control.current_list.try_lock()
-                {
-                    let last_index = c_list.len() - 1;
-                    let mut new_length =
-                        self.current_node.begin.unwrap_or_default() + self.current_node.duration;
+                let mut current_time = time_in_seconds();
+                let (_, total_delta) = get_delta(&self.config, &current_time);
 
-                    if self.current_node.index.unwrap_or_default() >= last_index {
-                        // Only take last clip when index match or over
-                        trace!(
-                            "change current node, because index ({}) is over last item index: {last_index}",
-                            self.current_node.index.unwrap_or_default()
-                        );
-
-                        self.current_node = c_list[last_index].clone();
-                        new_length = c_list[last_index].begin.unwrap_or_default()
-                            + c_list[last_index].duration;
-                    }
-
-                    (last_index, new_length)
-                } else {
-                    trace!("Lock from current_list not possible!");
-
-                    (0, 0.0)
-                };
-
-                trace!(
-                    "Init playlist after playlist end, or missing files, index: {}",
-                    self.current_node.index.unwrap_or_default()
-                );
-
-                let next_playlist = self.check_for_next_playlist();
-
-                if new_length
-                    >= self.config.playlist.length_sec.unwrap()
-                        + self.config.playlist.start_sec.unwrap()
-                {
-                    self.init_clip();
-                } else if next_playlist
-                    && self.player_control.current_list.lock().unwrap().len() > 1
-                {
-                    let index = self
-                        .player_control
-                        .current_index
-                        .fetch_add(1, Ordering::SeqCst);
-
-                    let nodes = self.player_control.current_list.lock().unwrap();
-                    let node_clone = nodes[index].clone();
-
-                    drop(nodes);
-
-                    self.current_node = gen_source(
-                        &self.config,
-                        node_clone,
-                        &self.playout_stat,
-                        &self.player_control,
-                        0,
-                    );
-
-                    return Some(self.current_node.clone());
-                } else if !init_clip_is_filler {
-                    // TODO: maybe this should be never true
-
-                    // fill missing length from playlist
-                    let mut current_time = get_sec();
-                    let (_, total_delta) = get_delta(&self.config, &current_time);
-
-                    trace!("Total delta on list init: {total_delta}");
-
-                    let out = if DUMMY_LEN > total_delta {
-                        total_delta
-                    } else {
-                        DUMMY_LEN
-                    };
-
-                    let duration = out + 0.001;
-
-                    if self.json_path.is_some() {
-                        // When playlist is missing, we always need to init the playlist the next iteration.
-                        self.playout_stat.list_init.store(true, Ordering::SeqCst);
-                    }
-
-                    if self.config.playlist.start_sec.unwrap() > current_time {
-                        current_time += self.config.playlist.length_sec.unwrap() + 1.0;
-                    }
-
-                    let mut nodes = self.player_control.current_list.lock().unwrap();
-                    let index = nodes.len();
-
-                    let mut media = Media::new(index, "", false);
-                    media.begin = Some(current_time);
-                    media.duration = duration;
-                    media.out = out;
-
-                    self.current_node = gen_source(
-                        &self.config,
-                        media,
-                        &self.playout_stat,
-                        &self.player_control,
-                        last_index,
-                    );
-
-                    nodes.push(self.current_node.clone());
-                    self.player_control
-                        .current_index
-                        .store(nodes.len(), Ordering::SeqCst);
+                if self.start_sec > current_time {
+                    current_time += self.end_sec + 1.0;
                 }
+
+                let mut last_index = 0;
+                let length = self.player_control.current_list.lock().unwrap().len();
+
+                if length > 0 {
+                    last_index = length - 1;
+                }
+
+                let mut media = Media::new(length, "", false);
+                media.begin = Some(current_time);
+                media.duration = total_delta;
+                media.out = total_delta;
+
+                self.current_node = gen_source(
+                    &self.config,
+                    media,
+                    &self.playout_stat,
+                    &self.player_control,
+                    last_index,
+                );
             }
 
             self.last_next_ad();
@@ -468,7 +385,8 @@ impl Iterator for CurrentProgram {
         if self.player_control.current_index.load(Ordering::SeqCst)
             < self.player_control.current_list.lock().unwrap().len()
         {
-            self.check_for_next_playlist();
+            // get next clip from current playlist
+
             let mut is_last = false;
             let index = self.player_control.current_index.load(Ordering::SeqCst);
             let node_list = self.player_control.current_list.lock().unwrap();
@@ -496,71 +414,37 @@ impl Iterator for CurrentProgram {
 
             Some(self.current_node.clone())
         } else {
-            let last_playlist = self.json_path.clone();
-            let last_ad = self.current_node.last_ad;
-            self.check_for_next_playlist();
-            let (_, total_delta) =
-                get_delta(&self.config, &self.config.playlist.start_sec.unwrap());
+            let (_, total_delta) = get_delta(&self.config, &self.start_sec);
 
             if !self.config.playlist.infinit
-                && last_playlist == self.json_path
+                && self.last_json_path == self.json_path
                 && total_delta.abs() > 1.0
             {
-                trace!("Total delta on list end: {total_delta}");
-
                 // Playlist is to early finish,
                 // and if we have to fill it with a placeholder.
-                let index = self.player_control.current_index.load(Ordering::SeqCst);
-                self.current_node = Media::new(index, "", false);
-                self.current_node.begin = Some(get_sec());
+                trace!("Total delta on list end: {total_delta}");
 
-                let out = if DUMMY_LEN > total_delta {
-                    total_delta
-                } else {
-                    DUMMY_LEN
-                };
-
-                let duration = out + 0.001;
-
-                self.current_node.duration = duration;
-                self.current_node.out = out;
-                self.current_node = gen_source(
-                    &self.config,
-                    self.current_node.clone(),
-                    &self.playout_stat,
-                    &self.player_control,
-                    0,
-                );
-                self.player_control
-                    .current_list
-                    .lock()
-                    .unwrap()
-                    .push(self.current_node.clone());
-                self.last_next_ad();
-
-                self.current_node.last_ad = last_ad;
-                self.current_node
-                    .add_filter(&self.config, &self.playout_stat.chain);
-
-                self.player_control
-                    .current_index
-                    .fetch_add(1, Ordering::SeqCst);
+                self.fill_end(total_delta);
 
                 return Some(self.current_node.clone());
             }
-
             // Get first clip from next playlist.
+
+            let c_list = self.player_control.current_list.lock().unwrap();
+            let first_node = c_list[0].clone();
+
+            drop(c_list);
+
             self.player_control.current_index.store(0, Ordering::SeqCst);
             self.current_node = gen_source(
                 &self.config,
-                self.player_control.current_list.lock().unwrap()[0].clone(),
+                first_node,
                 &self.playout_stat,
                 &self.player_control,
                 0,
             );
             self.last_next_ad();
-            self.current_node.last_ad = last_ad;
-
+            self.current_node.last_ad = self.last_node_ad;
             self.player_control.current_index.store(1, Ordering::SeqCst);
 
             Some(self.current_node.clone())
@@ -650,26 +534,26 @@ pub fn gen_source(
         warn!("Clip is less then 1 second long (<yellow>{duration:.3}</>), adjust length.");
 
         duration = 1.2;
+
+        if node.seek > 1.0 {
+            node.seek -= 1.0;
+        } else {
+            node.out += 1.0;
+        }
     }
 
-    trace!("Clip out: {duration}, duration: {}", node.duration);
+    trace!("Clip new length: {duration}, duration: {}", node.duration);
 
     if node.probe.is_none() && !node.source.is_empty() {
-        node.add_probe(true);
+        if let Err(e) = node.add_probe(true) {
+            trace!("{e:?}");
+        };
     } else {
         trace!("Node has a probe...")
     }
 
     // separate if condition, because of node.add_probe() in last condition
     if node.probe.is_some() {
-        if node.out - node.seek < 1.0 {
-            if node.seek > 1.0 {
-                node.seek -= 1.0;
-            } else {
-                node.out += 1.0;
-            }
-        }
-
         if node
             .source
             .rsplit_once('.')
@@ -686,29 +570,36 @@ pub fn gen_source(
 
         // Last index is the index from the last item from the node list.
         if node_index < last_index {
-            error!("Source not found: <b><magenta>\"{}\"</></b>", node.source);
+            error!("Source not found: <b><magenta>{}</></b>", node.source);
         }
 
-        let filler_source = &config.storage.filler;
+        let mut filler_list = vec![];
 
-        if filler_source.is_dir() && !player_control.filler_list.lock().unwrap().is_empty() {
+        match player_control.filler_list.try_lock() {
+            Ok(list) => filler_list = list.to_vec(),
+            Err(e) => error!("Lock filler list error: {e}"),
+        }
+
+        if config.storage.filler.is_dir() && !filler_list.is_empty() {
             let filler_index = player_control.filler_index.fetch_add(1, Ordering::SeqCst);
-            let mut filler_media = player_control.filler_list.lock().unwrap()[filler_index].clone();
+            let mut filler_media = filler_list[filler_index].clone();
 
             trace!("take filler: {}", filler_media.source);
 
             // Set list_init to true, to stay in sync.
             playout_stat.list_init.store(true, Ordering::SeqCst);
 
-            if filler_index == player_control.filler_list.lock().unwrap().len() - 1 {
+            if filler_index == filler_list.len() - 1 {
                 player_control.filler_index.store(0, Ordering::SeqCst)
             }
 
             if filler_media.probe.is_none() {
-                filler_media.add_probe(false);
+                if let Err(e) = filler_media.add_probe(false) {
+                    error!("{e:?}");
+                };
             }
 
-            if node.duration > duration && filler_media.duration > duration {
+            if filler_media.duration > duration {
                 filler_media.out = duration;
             }
 
@@ -741,8 +632,15 @@ pub fn gen_source(
                         .and_then(|d| d.parse::<f64>().ok())
                     {
                         // Create placeholder from config filler.
+                        let mut filler_out = filler_duration;
+
+                        if filler_duration > duration {
+                            filler_out = duration;
+                        }
+
                         node.source = config.storage.filler.clone().to_string_lossy().to_string();
-                        node.out = duration;
+                        node.seek = 0.0;
+                        node.out = filler_out;
                         node.duration = filler_duration;
                         node.cmd = Some(loop_filler(&node));
                         node.probe = Some(probe);
@@ -754,10 +652,19 @@ pub fn gen_source(
                     }
                 }
                 Err(e) => {
-                    error!("{e}");
-
                     // Create colored placeholder.
-                    let (source, cmd) = gen_dummy(config, duration);
+                    error!("Filler error: {e}");
+
+                    let mut dummy_duration = 60.0;
+
+                    if dummy_duration > duration {
+                        dummy_duration = duration;
+                    }
+
+                    let (source, cmd) = gen_dummy(config, dummy_duration);
+                    node.seek = 0.0;
+                    node.out = dummy_duration;
+                    node.duration = dummy_duration;
                     node.source = source;
                     node.cmd = Some(cmd);
                 }
@@ -776,7 +683,7 @@ pub fn gen_source(
         "return gen_source: {}, seek: {}, out: {}",
         node.source,
         node.seek,
-        node.out
+        node.out,
     );
 
     node
diff --git a/ffplayout-engine/src/rpc/server.rs b/ffplayout-engine/src/rpc/server.rs
index f98a7963..2b99d31d 100644
--- a/ffplayout-engine/src/rpc/server.rs
+++ b/ffplayout-engine/src/rpc/server.rs
@@ -212,7 +212,10 @@ fn control_back(
             let mut data_map = Map::new();
             let mut media = current_list[index - 2].clone();
             play_control.current_index.fetch_sub(2, Ordering::SeqCst);
-            media.add_probe(false);
+
+            if let Err(e) = media.add_probe(false) {
+                error!("{e:?}");
+            };
 
             let (delta, _) = get_delta(config, &media.begin.unwrap_or(0.0));
             *time_shift = delta;
@@ -258,7 +261,10 @@ fn control_next(
 
             let mut data_map = Map::new();
             let mut media = current_list[index].clone();
-            media.add_probe(false);
+
+            if let Err(e) = media.add_probe(false) {
+                error!("{e:?}");
+            };
 
             let (delta, _) = get_delta(config, &media.begin.unwrap_or(0.0));
             *time_shift = delta;
diff --git a/ffplayout-engine/src/utils/mod.rs b/ffplayout-engine/src/utils/mod.rs
index dc741e9a..d97390e1 100644
--- a/ffplayout-engine/src/utils/mod.rs
+++ b/ffplayout-engine/src/utils/mod.rs
@@ -14,7 +14,7 @@ pub use arg_parse::Args;
 use ffplayout_lib::{
     filter::Filters,
     utils::{
-        config::Template, errors::ProcError, get_sec, parse_log_level_filter, sec_to_time,
+        config::Template, errors::ProcError, parse_log_level_filter, sec_to_time, time_in_seconds,
         time_to_sec, Media, OutputMode::*, PlayoutConfig, PlayoutStatus, ProcessMode::*,
     },
     vec_strings,
@@ -254,7 +254,7 @@ pub fn get_data_map(
     server_is_running: bool,
 ) -> Map<String, Value> {
     let mut data_map = Map::new();
-    let current_time = get_sec();
+    let current_time = time_in_seconds();
     let shift = *playout_stat.time_shift.lock().unwrap();
     let begin = media.begin.unwrap_or(0.0) - shift;
 
diff --git a/lib/src/filter/mod.rs b/lib/src/filter/mod.rs
index ec76221e..dffc054d 100644
--- a/lib/src/filter/mod.rs
+++ b/lib/src/filter/mod.rs
@@ -304,11 +304,11 @@ fn overlay(node: &mut Media, chain: &mut Filters, config: &PlayoutConfig) {
             config.processing.logo.replace('\\', "/").replace(':', "\\\\:"), config.processing.logo_opacity, config.processing.logo_filter
         );
 
-        if node.last_ad.unwrap_or(false) {
+        if node.last_ad {
             logo_chain.push_str(",fade=in:st=0:d=1.0:alpha=1")
         }
 
-        if node.next_ad.unwrap_or(false) {
+        if node.next_ad {
             logo_chain.push_str(&format!(
                 ",fade=out:st={}:d=1.0:alpha=1",
                 node.out - node.seek - 1.0
diff --git a/lib/src/utils/folder.rs b/lib/src/utils/folder.rs
index cf521719..9f297d57 100644
--- a/lib/src/utils/folder.rs
+++ b/lib/src/utils/folder.rs
@@ -9,7 +9,7 @@ use simplelog::*;
 use walkdir::WalkDir;
 
 use crate::utils::{
-    controller::PlayerControl, get_sec, include_file_extension, Media, PlayoutConfig,
+    controller::PlayerControl, include_file_extension, time_in_seconds, Media, PlayoutConfig,
 };
 
 /// Folder Sources
@@ -136,10 +136,10 @@ impl Iterator for FolderSource {
         {
             let i = self.player_control.current_index.load(Ordering::SeqCst);
             self.current_node = self.player_control.current_list.lock().unwrap()[i].clone();
-            self.current_node.add_probe(false);
+            let _ = self.current_node.add_probe(false).ok();
             self.current_node
                 .add_filter(&self.config, &self.filter_chain);
-            self.current_node.begin = Some(get_sec());
+            self.current_node.begin = Some(time_in_seconds());
 
             self.player_control
                 .current_index
@@ -162,10 +162,10 @@ impl Iterator for FolderSource {
             }
 
             self.current_node = self.player_control.current_list.lock().unwrap()[0].clone();
-            self.current_node.add_probe(false);
+            let _ = self.current_node.add_probe(false).ok();
             self.current_node
                 .add_filter(&self.config, &self.filter_chain);
-            self.current_node.begin = Some(get_sec());
+            self.current_node.begin = Some(time_in_seconds());
 
             self.player_control.current_index.store(1, Ordering::SeqCst);
 
@@ -192,7 +192,9 @@ pub fn fill_filler_list(
             let mut media = Media::new(index, &entry.path().to_string_lossy(), false);
 
             if player_control.is_none() {
-                media.add_probe(false);
+                if let Err(e) = media.add_probe(false) {
+                    error!("{e:?}");
+                };
             }
 
             filler_list.push(media);
@@ -217,7 +219,9 @@ pub fn fill_filler_list(
         let mut media = Media::new(0, &config.storage.filler.to_string_lossy(), false);
 
         if player_control.is_none() {
-            media.add_probe(false);
+            if let Err(e) = media.add_probe(false) {
+                error!("{e:?}");
+            };
         }
 
         filler_list.push(media);
diff --git a/lib/src/utils/json_serializer.rs b/lib/src/utils/json_serializer.rs
index 07d81003..920e523a 100644
--- a/lib/src/utils/json_serializer.rs
+++ b/lib/src/utils/json_serializer.rs
@@ -73,8 +73,8 @@ fn set_defaults(
     for (i, item) in playlist.program.iter_mut().enumerate() {
         item.begin = Some(start_sec);
         item.index = Some(i);
-        item.last_ad = Some(false);
-        item.next_ad = Some(false);
+        item.last_ad = false;
+        item.next_ad = false;
         item.process = Some(true);
         item.filter = None;
 
@@ -115,8 +115,8 @@ fn loop_playlist(
                 probe_audio: item.probe_audio.clone(),
                 process: Some(true),
                 unit: Decoder,
-                last_ad: Some(false),
-                next_ad: Some(false),
+                last_ad: false,
+                next_ad: false,
                 filter: None,
                 custom_filter: String::new(),
             };
diff --git a/lib/src/utils/json_validate.rs b/lib/src/utils/json_validate.rs
index d0ba7ddd..7e0ce2da 100644
--- a/lib/src/utils/json_validate.rs
+++ b/lib/src/utils/json_validate.rs
@@ -173,9 +173,17 @@ pub fn validate_playlist(
         let pos = index + 1;
 
         if item.audio.is_empty() {
-            item.add_probe(false);
-        } else {
-            item.add_probe(true);
+            if let Err(e) = item.add_probe(false) {
+                error!(
+                    "[Validation] Error on position <yellow>{pos:0>3}</> <yellow>{}</>: {e}",
+                    sec_to_time(begin)
+                );
+            }
+        } else if let Err(e) = item.add_probe(true) {
+            error!(
+                "[Validation] Error on position <yellow>{pos:0>3}</> <yellow>{}</>: {e}",
+                sec_to_time(begin)
+            );
         }
 
         if item.probe.is_some() {
@@ -183,7 +191,7 @@ pub fn validate_playlist(
                 error!("{e}");
             } else if config.general.validate {
                 debug!(
-                    "Source at <yellow>{}</>, seems fine: <b><magenta>{}</></b>",
+                    "[Validation] Source at <yellow>{}</>, seems fine: <b><magenta>{}</></b>",
                     sec_to_time(begin),
                     item.source
                 )
@@ -200,7 +208,7 @@ pub fn validate_playlist(
 
                         if !is_close(o.duration, probe_duration, 1.2) {
                             error!(
-                                "File duration (at: <yellow>{}</>) differs from playlist value. File duration: <yellow>{}</>, playlist value: <yellow>{}</>, source <b><magenta>{}</></b>",
+                                "[Validation] File duration (at: <yellow>{}</>) differs from playlist value. File duration: <yellow>{}</>, playlist value: <yellow>{}</>, source <b><magenta>{}</></b>",
                                 sec_to_time(o.begin.unwrap_or_default()), sec_to_time(probe_duration), sec_to_time(o.duration), o.source
                             );
 
@@ -214,12 +222,6 @@ pub fn validate_playlist(
                     }
                 });
             }
-        } else {
-            error!(
-                "Error on position <yellow>{pos:0>3}</> <yellow>{}</>, file: <b><magenta>{}</></b>",
-                sec_to_time(begin),
-                item.source
-            );
         }
 
         begin += item.out - item.seek;
@@ -227,7 +229,7 @@ pub fn validate_playlist(
 
     if !config.playlist.infinit && length > begin + 1.2 {
         error!(
-            "Playlist from <yellow>{date}</> not long enough, <yellow>{}</> needed!",
+            "[Validation] Playlist from <yellow>{date}</> not long enough, <yellow>{}</> needed!",
             sec_to_time(length - begin),
         );
     }
diff --git a/lib/src/utils/mod.rs b/lib/src/utils/mod.rs
index 723e89fd..40614da8 100644
--- a/lib/src/utils/mod.rs
+++ b/lib/src/utils/mod.rs
@@ -104,10 +104,10 @@ pub struct Media {
     pub probe_audio: Option<MediaProbe>,
 
     #[serde(skip_serializing, skip_deserializing)]
-    pub last_ad: Option<bool>,
+    pub last_ad: bool,
 
     #[serde(skip_serializing, skip_deserializing)]
-    pub next_ad: Option<bool>,
+    pub next_ad: bool,
 
     #[serde(skip_serializing, skip_deserializing)]
     pub process: Option<bool>,
@@ -122,18 +122,15 @@ impl Media {
         let mut probe = None;
 
         if do_probe && (is_remote(src) || Path::new(src).is_file()) {
-            match MediaProbe::new(src) {
-                Ok(p) => {
-                    probe = Some(p.clone());
+            if let Ok(p) = MediaProbe::new(src) {
+                probe = Some(p.clone());
 
-                    duration = p
-                        .format
-                        .duration
-                        .unwrap_or_default()
-                        .parse()
-                        .unwrap_or_default();
-                }
-                Err(e) => error!("{e}"),
+                duration = p
+                    .format
+                    .duration
+                    .unwrap_or_default()
+                    .parse()
+                    .unwrap_or_default();
             }
         }
 
@@ -152,14 +149,16 @@ impl Media {
             custom_filter: String::new(),
             probe,
             probe_audio: None,
-            last_ad: Some(false),
-            next_ad: Some(false),
+            last_ad: false,
+            next_ad: false,
             process: Some(true),
             unit: Decoder,
         }
     }
 
-    pub fn add_probe(&mut self, check_audio: bool) {
+    pub fn add_probe(&mut self, check_audio: bool) -> Result<(), String> {
+        let mut errors = vec![];
+
         if self.probe.is_none() {
             match MediaProbe::new(&self.source) {
                 Ok(probe) => {
@@ -178,7 +177,7 @@ impl Media {
                         }
                     }
                 }
-                Err(e) => error!("{e}"),
+                Err(e) => errors.push(e.to_string()),
             };
 
             if check_audio && Path::new(&self.audio).is_file() {
@@ -194,10 +193,16 @@ impl Media {
                                 .unwrap_or_default()
                         }
                     }
-                    Err(e) => error!("{e}"),
+                    Err(e) => errors.push(e.to_string()),
                 }
             }
         }
+
+        if !errors.is_empty() {
+            return Err(errors.join(", "));
+        }
+
+        Ok(())
     }
 
     pub fn add_filter(
@@ -274,7 +279,9 @@ impl MediaProbe {
             }
             Err(e) => {
                 if !Path::new(input).is_file() && !is_remote(input) {
-                    Err(ProcError::Custom(format!("File '{input}' not exist!")))
+                    Err(ProcError::Custom(format!(
+                        "File <b><magenta>{input}</></b> not exist!"
+                    )))
                 } else {
                     Err(ProcError::Ffprobe(e))
                 }
@@ -337,7 +344,7 @@ pub fn write_status(config: &PlayoutConfig, date: &str, shift: f64) {
 // }
 
 /// Get current time in seconds.
-pub fn get_sec() -> f64 {
+pub fn time_in_seconds() -> f64 {
     let local: DateTime<Local> = time_now();
 
     (local.hour() * 3600 + local.minute() * 60 + local.second()) as f64
@@ -351,11 +358,11 @@ pub fn get_sec() -> f64 {
 pub fn get_date(seek: bool, start: f64, get_next: bool) -> String {
     let local: DateTime<Local> = time_now();
 
-    if seek && start > get_sec() {
+    if seek && start > time_in_seconds() {
         return (local - Duration::days(1)).format("%Y-%m-%d").to_string();
     }
 
-    if start == 0.0 && get_next && get_sec() > 86397.9 {
+    if start == 0.0 && get_next && time_in_seconds() > 86397.9 {
         return (local + Duration::days(1)).format("%Y-%m-%d").to_string();
     }
 
@@ -401,7 +408,7 @@ pub fn modified_time(path: &str) -> Option<String> {
 /// Convert a formatted time string to seconds.
 pub fn time_to_sec(time_str: &str) -> f64 {
     if matches!(time_str, "now" | "" | "none") || !time_str.contains(':') {
-        return get_sec();
+        return time_in_seconds();
     }
 
     let t: Vec<&str> = time_str.split(':').collect();
@@ -452,7 +459,7 @@ pub fn sum_durations(clip_list: &Vec<Media>) -> f64 {
 ///
 /// We also get here the global delta between clip start and time when a new playlist should start.
 pub fn get_delta(config: &PlayoutConfig, begin: &f64) -> (f64, f64) {
-    let mut current_time = get_sec();
+    let mut current_time = time_in_seconds();
     let start = config.playlist.start_sec.unwrap();
     let length = time_to_sec(&config.playlist.length);
     let mut target_length = 86400.0;
diff --git a/tests/assets/media_filler/filler_0.mp4 b/tests/assets/media_filler/filler_0.mp4
new file mode 100644
index 00000000..6f5aef7c
Binary files /dev/null and b/tests/assets/media_filler/filler_0.mp4 differ
diff --git a/tests/assets/media_filler/filler_1.mp4 b/tests/assets/media_filler/filler_1.mp4
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diff --git a/tests/assets/ad.mp4 b/tests/assets/media_mix/ad.mp4
similarity index 100%
rename from tests/assets/ad.mp4
rename to tests/assets/media_mix/ad.mp4
diff --git a/tests/assets/audio.mp3 b/tests/assets/media_mix/audio.mp3
similarity index 100%
rename from tests/assets/audio.mp3
rename to tests/assets/media_mix/audio.mp3
diff --git a/tests/assets/av_sync.mp4 b/tests/assets/media_mix/av_sync.mp4
similarity index 100%
rename from tests/assets/av_sync.mp4
rename to tests/assets/media_mix/av_sync.mp4
diff --git a/tests/assets/dual_audio.mp4 b/tests/assets/media_mix/dual_audio.mp4
similarity index 100%
rename from tests/assets/dual_audio.mp4
rename to tests/assets/media_mix/dual_audio.mp4
diff --git a/tests/assets/dual_audio_vtt.mkv b/tests/assets/media_mix/dual_audio_vtt.mkv
similarity index 100%
rename from tests/assets/dual_audio_vtt.mkv
rename to tests/assets/media_mix/dual_audio_vtt.mkv
diff --git a/tests/assets/no_audio.mp4 b/tests/assets/media_mix/no_audio.mp4
similarity index 100%
rename from tests/assets/no_audio.mp4
rename to tests/assets/media_mix/no_audio.mp4
diff --git a/tests/assets/short_audio.mp4 b/tests/assets/media_mix/short_audio.mp4
similarity index 100%
rename from tests/assets/short_audio.mp4
rename to tests/assets/media_mix/short_audio.mp4
diff --git a/tests/assets/short_video.mp4 b/tests/assets/media_mix/short_video.mp4
similarity index 100%
rename from tests/assets/short_video.mp4
rename to tests/assets/media_mix/short_video.mp4
diff --git a/tests/assets/still.jpg b/tests/assets/media_mix/still.jpg
similarity index 100%
rename from tests/assets/still.jpg
rename to tests/assets/media_mix/still.jpg
diff --git a/tests/assets/subtitle.vtt b/tests/assets/media_mix/subtitle.vtt
similarity index 100%
rename from tests/assets/subtitle.vtt
rename to tests/assets/media_mix/subtitle.vtt
diff --git a/tests/assets/video_audio_vtt.mkv b/tests/assets/media_mix/video_audio_vtt.mkv
similarity index 100%
rename from tests/assets/video_audio_vtt.mkv
rename to tests/assets/media_mix/video_audio_vtt.mkv
diff --git a/tests/assets/with_audio.mp4 b/tests/assets/media_mix/with_audio.mp4
similarity index 100%
rename from tests/assets/with_audio.mp4
rename to tests/assets/media_mix/with_audio.mp4
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index 00000000..67e6d633
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index 00000000..aff310ad
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index 00000000..15bd80c2
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index 00000000..d3535b9b
Binary files /dev/null and b/tests/assets/media_sorted/DarkGray_00-00-10.mp4 differ
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new file mode 100644
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Binary files /dev/null and b/tests/assets/media_sorted/DarkOrchid_00-00-25.mp4 differ
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new file mode 100644
index 00000000..01eb8191
Binary files /dev/null and b/tests/assets/media_sorted/ForestGreen_01-00-00.mp4 differ
diff --git a/tests/assets/media_sorted/IndianRed_01-00-00.mp4 b/tests/assets/media_sorted/IndianRed_01-00-00.mp4
new file mode 100644
index 00000000..1ca2de5f
Binary files /dev/null and b/tests/assets/media_sorted/IndianRed_01-00-00.mp4 differ
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new file mode 100644
index 00000000..d71ad1f7
Binary files /dev/null and b/tests/assets/media_sorted/Indigo_00-00-15.mp4 differ
diff --git a/tests/assets/media_sorted/LightGoldenRodYellow_00-00-20.mp4 b/tests/assets/media_sorted/LightGoldenRodYellow_00-00-20.mp4
new file mode 100644
index 00000000..c04c1e2c
Binary files /dev/null and b/tests/assets/media_sorted/LightGoldenRodYellow_00-00-20.mp4 differ
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new file mode 100644
index 00000000..97ccf3f3
Binary files /dev/null and b/tests/assets/media_sorted/LightSeaGreen_00-00-15.mp4 differ
diff --git a/tests/assets/media_sorted/MediumOrchid_00-30-00.mp4 b/tests/assets/media_sorted/MediumOrchid_00-30-00.mp4
new file mode 100644
index 00000000..bba312ee
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new file mode 100644
index 00000000..0a529818
Binary files /dev/null and b/tests/assets/media_sorted/MediumSeaGreen_00-25-00.mp4 differ
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new file mode 100644
index 00000000..a55bd30a
Binary files /dev/null and b/tests/assets/media_sorted/Olive_00-00-30.mp4 differ
diff --git a/tests/assets/media_sorted/Orange_00-00-45.mp4 b/tests/assets/media_sorted/Orange_00-00-45.mp4
new file mode 100644
index 00000000..fe5a6c08
Binary files /dev/null and b/tests/assets/media_sorted/Orange_00-00-45.mp4 differ
diff --git a/tests/assets/media_sorted/Plum_01-00-00.mp4 b/tests/assets/media_sorted/Plum_01-00-00.mp4
new file mode 100644
index 00000000..7250b55a
Binary files /dev/null and b/tests/assets/media_sorted/Plum_01-00-00.mp4 differ
diff --git a/tests/assets/media_sorted/Yellow_00-00-30.mp4 b/tests/assets/media_sorted/Yellow_00-00-30.mp4
new file mode 100644
index 00000000..83392521
Binary files /dev/null and b/tests/assets/media_sorted/Yellow_00-00-30.mp4 differ
diff --git a/tests/assets/playlists/2023/02/2023-02-08.json b/tests/assets/playlists/2023/02/2023-02-08.json
index b64b6b59..a611e7b9 100644
--- a/tests/assets/playlists/2023/02/2023-02-08.json
+++ b/tests/assets/playlists/2023/02/2023-02-08.json
@@ -6,22521 +6,22521 @@
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+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     }
   ]
 }
diff --git a/tests/assets/playlists/2023/02/2023-02-09.json b/tests/assets/playlists/2023/02/2023-02-09.json
index 6cb0656a..93574627 100644
--- a/tests/assets/playlists/2023/02/2023-02-09.json
+++ b/tests/assets/playlists/2023/02/2023-02-09.json
@@ -6,22521 +6,22521 @@
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
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       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     }
   ]
 }
diff --git a/tests/assets/playlists/2024/01/2024-01-30.json b/tests/assets/playlists/2024/01/2024-01-30.json
index 47ee2c87..45657d04 100644
--- a/tests/assets/playlists/2024/01/2024-01-30.json
+++ b/tests/assets/playlists/2024/01/2024-01-30.json
@@ -6,22521 +6,22521 @@
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
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     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
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       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
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     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 16.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     }
   ]
 }
diff --git a/tests/assets/playlists/2024/01/2024-01-31.json b/tests/assets/playlists/2024/01/2024-01-31.json
index d0243975..46dd890a 100644
--- a/tests/assets/playlists/2024/01/2024-01-31.json
+++ b/tests/assets/playlists/2024/01/2024-01-31.json
@@ -6,22521 +6,22521 @@
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     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
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     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
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+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
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     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
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     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
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     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
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       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
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+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
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     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
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     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/with_audio.mp4"
+      "source": "assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/dual_audio.mp4"
+      "source": "assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_video.mp4"
+      "source": "assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "assets/ad.mp4",
+      "source": "assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "assets/short_audio.mp4"
+      "source": "assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "assets/av_sync.mp4"
+      "source": "assets/media_mix/av_sync.mp4"
     }
   ]
 }
diff --git a/tests/assets/playlists/2024/02/2024-02-01.json b/tests/assets/playlists/2024/02/2024-02-01.json
new file mode 100644
index 00000000..1661619e
--- /dev/null
+++ b/tests/assets/playlists/2024/02/2024-02-01.json
@@ -0,0 +1,294 @@
+{
+    "channel": "Test 1",
+    "date": "2024-02-01",
+    "program": [
+        {
+            "in": 0,
+            "out": 10.0,
+            "duration": 10.0,
+            "source": "tests/assets/media_sorted/DarkGray_00-00-10.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Olive_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/Indigo_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 25.0,
+            "duration": 25.0,
+            "source": "tests/assets/media_sorted/DarkOrchid_00-00-25.mp4"
+        },
+        {
+            "in": 0,
+            "out": 45.0,
+            "duration": 45.0,
+            "source": "tests/assets/media_sorted/Orange_00-00-45.mp4"
+        },
+        {
+            "in": 0,
+            "out": 20.0,
+            "duration": 20.0,
+            "source": "tests/assets/media_sorted/LightGoldenRodYellow_00-00-20.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Cyan_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 50.0,
+            "duration": 50.0,
+            "source": "tests/assets/media_sorted/Cornsilk_00-00-50.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/LightSeaGreen_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Yellow_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Aqua_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1500.0,
+            "duration": 1500.0,
+            "source": "tests/assets/media_sorted/MediumSeaGreen_00-25-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1800.0,
+            "duration": 1800.0,
+            "source": "tests/assets/media_sorted/MediumOrchid_00-30-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1800.0,
+            "duration": 1800.0,
+            "source": "tests/assets/media_sorted/MediumOrchid_00-30-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1500.0,
+            "duration": 1500.0,
+            "source": "tests/assets/media_sorted/MediumSeaGreen_00-25-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 10.0,
+            "duration": 10.0,
+            "source": "tests/assets/media_sorted/DarkGray_00-00-10.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Olive_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/Indigo_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 25.0,
+            "duration": 25.0,
+            "source": "tests/assets/media_sorted/DarkOrchid_00-00-25.mp4"
+        },
+        {
+            "in": 0,
+            "out": 45.0,
+            "duration": 45.0,
+            "source": "tests/assets/media_sorted/Orange_00-00-45.mp4"
+        },
+        {
+            "in": 0,
+            "out": 20.0,
+            "duration": 20.0,
+            "source": "tests/assets/media_sorted/LightGoldenRodYellow_00-00-20.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Cyan_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 50.0,
+            "duration": 50.0,
+            "source": "tests/assets/media_sorted/Cornsilk_00-00-50.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/LightSeaGreen_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Yellow_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Aqua_00-00-30.mp4"
+        }
+    ]
+}
diff --git a/tests/assets/playlists/2024/02/2024-02-02.json b/tests/assets/playlists/2024/02/2024-02-02.json
new file mode 100644
index 00000000..1661619e
--- /dev/null
+++ b/tests/assets/playlists/2024/02/2024-02-02.json
@@ -0,0 +1,294 @@
+{
+    "channel": "Test 1",
+    "date": "2024-02-01",
+    "program": [
+        {
+            "in": 0,
+            "out": 10.0,
+            "duration": 10.0,
+            "source": "tests/assets/media_sorted/DarkGray_00-00-10.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Olive_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/Indigo_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 25.0,
+            "duration": 25.0,
+            "source": "tests/assets/media_sorted/DarkOrchid_00-00-25.mp4"
+        },
+        {
+            "in": 0,
+            "out": 45.0,
+            "duration": 45.0,
+            "source": "tests/assets/media_sorted/Orange_00-00-45.mp4"
+        },
+        {
+            "in": 0,
+            "out": 20.0,
+            "duration": 20.0,
+            "source": "tests/assets/media_sorted/LightGoldenRodYellow_00-00-20.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Cyan_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 50.0,
+            "duration": 50.0,
+            "source": "tests/assets/media_sorted/Cornsilk_00-00-50.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/LightSeaGreen_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Yellow_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Aqua_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1500.0,
+            "duration": 1500.0,
+            "source": "tests/assets/media_sorted/MediumSeaGreen_00-25-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1800.0,
+            "duration": 1800.0,
+            "source": "tests/assets/media_sorted/MediumOrchid_00-30-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1800.0,
+            "duration": 1800.0,
+            "source": "tests/assets/media_sorted/MediumOrchid_00-30-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1500.0,
+            "duration": 1500.0,
+            "source": "tests/assets/media_sorted/MediumSeaGreen_00-25-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 10.0,
+            "duration": 10.0,
+            "source": "tests/assets/media_sorted/DarkGray_00-00-10.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Olive_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/Indigo_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 25.0,
+            "duration": 25.0,
+            "source": "tests/assets/media_sorted/DarkOrchid_00-00-25.mp4"
+        },
+        {
+            "in": 0,
+            "out": 45.0,
+            "duration": 45.0,
+            "source": "tests/assets/media_sorted/Orange_00-00-45.mp4"
+        },
+        {
+            "in": 0,
+            "out": 20.0,
+            "duration": 20.0,
+            "source": "tests/assets/media_sorted/LightGoldenRodYellow_00-00-20.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Cyan_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 50.0,
+            "duration": 50.0,
+            "source": "tests/assets/media_sorted/Cornsilk_00-00-50.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/LightSeaGreen_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Yellow_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Aqua_00-00-30.mp4"
+        }
+    ]
+}
diff --git a/tests/assets/playlists/playlist_full.json b/tests/assets/playlists/playlist_full.json
index 17228835..9461b481 100644
--- a/tests/assets/playlists/playlist_full.json
+++ b/tests/assets/playlists/playlist_full.json
@@ -6,22521 +6,22521 @@
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/still.jpg"
+      "source": "tests/assets/media_mix/still.jpg"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/still.jpg"
+      "source": "tests/assets/media_mix/still.jpg"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/still.jpg"
+      "source": "tests/assets/media_mix/still.jpg"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/still.jpg"
+      "source": "tests/assets/media_mix/still.jpg"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
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-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/with_audio.mp4"
+      "source": "tests/assets/media_mix/with_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/still.jpg"
+      "source": "tests/assets/media_mix/still.jpg"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     }
   ]
 }
diff --git a/tests/assets/playlists/playlist_short.json b/tests/assets/playlists/playlist_short.json
index 508a4d80..c6fa1c3d 100644
--- a/tests/assets/playlists/playlist_short.json
+++ b/tests/assets/playlists/playlist_short.json
@@ -6,50 +6,50 @@
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/av_sync.mp4"
+      "source": "tests/assets/media_mix/av_sync.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/dual_audio.mp4"
+      "source": "tests/assets/media_mix/dual_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_video.mp4"
+      "source": "tests/assets/media_mix/short_video.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/still.jpg"
+      "source": "tests/assets/media_mix/still.jpg"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/short_audio.mp4"
+      "source": "tests/assets/media_mix/short_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 30.0,
       "duration": 30.0,
-      "source": "tests/assets/no_audio.mp4"
+      "source": "tests/assets/media_mix/no_audio.mp4"
     },
     {
       "in": 0.0,
       "out": 10.0,
       "duration": 10.0,
-      "source": "tests/assets/still.jpg",
-      "audio": "tests/assets/audio.mp3"
+      "source": "tests/assets/media_mix/still.jpg",
+      "audio": "tests/assets/media_mix/audio.mp3"
     },
     {
       "in": 0.0,
       "out": 25.0,
       "duration": 25.0,
-      "source": "tests/assets/ad.mp4",
+      "source": "tests/assets/media_mix/ad.mp4",
       "category": "advertisement"
     }
   ]
diff --git a/tests/assets/playlists/playlist_sorted.json b/tests/assets/playlists/playlist_sorted.json
new file mode 100644
index 00000000..fee0d291
--- /dev/null
+++ b/tests/assets/playlists/playlist_sorted.json
@@ -0,0 +1,294 @@
+{
+    "channel": "Test 1",
+    "date": "2024-02-01",
+    "program": [
+        {
+            "in": 0,
+            "out": 10.0,
+            "duration": 10.0,
+            "source": "tests/assets/media_sorted/DarkGray_00-00-10.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Olive_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/Indigo_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 25.0,
+            "duration": 25.0,
+            "source": "tests/assets/media_sorted/DarkOrchid_00-00-25.mp4"
+        },
+        {
+            "in": 0,
+            "out": 45.0,
+            "duration": 45.0,
+            "source": "tests/assets/media_sorted/Orange_00-00-45.mp4"
+        },
+        {
+            "in": 0,
+            "out": 20.0,
+            "duration": 20.0,
+            "source": "tests/assets/media_sorted/LightGoldenRodYellow_00-00-20.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Cyan_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 50.0,
+            "duration": 50.0,
+            "source": "tests/assets/media_sorted/Cornsilk_00-00-50.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/LightSeaGreen_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Yellow_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Aqua_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1500.0,
+            "duration": 1500.0,
+            "source": "tests/assets/media_sorted/MediumSeaGreen_00-25-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1800.0,
+            "duration": 1800.0,
+            "source": "tests/assets/media_sorted/MediumOrchid_00-30-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/ForestGreen_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/Plum_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 3600.0,
+            "duration": 3600.0,
+            "source": "tests/assets/media_sorted/IndianRed_01-00-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1800.0,
+            "duration": 1800.0,
+            "source": "tests/assets/media_sorted/MediumOrchid_00-30-00.mp4"
+        },
+        {
+            "in": 0,
+            "out": 10.0,
+            "duration": 10.0,
+            "source": "tests/assets/media_sorted/DarkGray_00-00-10.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Olive_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/Indigo_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 25.0,
+            "duration": 25.0,
+            "source": "tests/assets/media_sorted/DarkOrchid_00-00-25.mp4"
+        },
+        {
+            "in": 0,
+            "out": 45.0,
+            "duration": 45.0,
+            "source": "tests/assets/media_sorted/Orange_00-00-45.mp4"
+        },
+        {
+            "in": 0,
+            "out": 20.0,
+            "duration": 20.0,
+            "source": "tests/assets/media_sorted/LightGoldenRodYellow_00-00-20.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Cyan_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 50.0,
+            "duration": 50.0,
+            "source": "tests/assets/media_sorted/Cornsilk_00-00-50.mp4"
+        },
+        {
+            "in": 0,
+            "out": 15.0,
+            "duration": 15.0,
+            "source": "tests/assets/media_sorted/LightSeaGreen_00-00-15.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Yellow_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 30.0,
+            "duration": 30.0,
+            "source": "tests/assets/media_sorted/Aqua_00-00-30.mp4"
+        },
+        {
+            "in": 0,
+            "out": 1500.0,
+            "duration": 1500.0,
+            "source": "tests/assets/media_sorted/MediumSeaGreen_00-25-00.mp4"
+        }
+    ]
+}
diff --git a/tests/src/engine_cmd.rs b/tests/src/engine_cmd.rs
index 81403584..07d25576 100644
--- a/tests/src/engine_cmd.rs
+++ b/tests/src/engine_cmd.rs
@@ -16,7 +16,7 @@ fn video_audio_input() {
     let logo_path = fs::canonicalize("./assets/logo.png").unwrap();
     config.processing.logo = logo_path.to_string_lossy().to_string();
 
-    let media_obj = Media::new(0, "./assets/with_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/with_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let test_filter_cmd =
@@ -29,7 +29,7 @@ fn video_audio_input() {
 
     assert_eq!(
         media.cmd,
-        Some(vec_strings!["-i", "./assets/with_audio.mp4"])
+        Some(vec_strings!["-i", "./assets/media_mix/with_audio.mp4"])
     );
     assert_eq!(media.filter.clone().unwrap().cmd(), test_filter_cmd);
     assert_eq!(media.filter.unwrap().map(), test_filter_map);
@@ -44,7 +44,7 @@ fn video_audio_custom_filter1_input() {
     config.processing.add_logo = false;
     config.processing.custom_filter = "[0:v]gblur=2[c_v_out];[0:a]volume=0.2[c_a_out]".to_string();
 
-    let media_obj = Media::new(0, "./assets/with_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/with_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let test_filter_cmd = vec_strings![
@@ -56,7 +56,7 @@ fn video_audio_custom_filter1_input() {
 
     assert_eq!(
         media.cmd,
-        Some(vec_strings!["-i", "./assets/with_audio.mp4"])
+        Some(vec_strings!["-i", "./assets/media_mix/with_audio.mp4"])
     );
     assert_eq!(media.filter.clone().unwrap().cmd(), test_filter_cmd);
     assert_eq!(media.filter.unwrap().map(), test_filter_map);
@@ -73,7 +73,7 @@ fn video_audio_custom_filter2_input() {
         "[0:v]null[v];movie=logo.png[l];[v][l]overlay[c_v_out];[0:a]volume=0.2[c_a_out]"
             .to_string();
 
-    let media_obj = Media::new(0, "./assets/with_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/with_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let test_filter_cmd = vec_strings![
@@ -85,7 +85,7 @@ fn video_audio_custom_filter2_input() {
 
     assert_eq!(
         media.cmd,
-        Some(vec_strings!["-i", "./assets/with_audio.mp4"])
+        Some(vec_strings!["-i", "./assets/media_mix/with_audio.mp4"])
     );
     assert_eq!(media.filter.clone().unwrap().cmd(), test_filter_cmd);
     assert_eq!(media.filter.unwrap().map(), test_filter_map);
@@ -101,7 +101,7 @@ fn video_audio_custom_filter3_input() {
     config.processing.custom_filter =
         "[v_in];movie=logo.png[l];[v_in][l]overlay[c_v_out];[0:a]volume=0.2[c_a_out]".to_string();
 
-    let media_obj = Media::new(0, "./assets/with_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/with_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let test_filter_cmd = vec_strings![
@@ -113,7 +113,7 @@ fn video_audio_custom_filter3_input() {
 
     assert_eq!(
         media.cmd,
-        Some(vec_strings!["-i", "./assets/with_audio.mp4"])
+        Some(vec_strings!["-i", "./assets/media_mix/with_audio.mp4"])
     );
     assert_eq!(media.filter.clone().unwrap().cmd(), test_filter_cmd);
     assert_eq!(media.filter.unwrap().map(), test_filter_map);
@@ -128,7 +128,7 @@ fn dual_audio_aevalsrc_input() {
     config.processing.audio_tracks = 2;
     config.processing.add_logo = false;
 
-    let media_obj = Media::new(0, "./assets/with_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/with_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let test_filter_cmd =
@@ -141,7 +141,7 @@ fn dual_audio_aevalsrc_input() {
 
     assert_eq!(
         media.cmd,
-        Some(vec_strings!["-i", "./assets/with_audio.mp4"])
+        Some(vec_strings!["-i", "./assets/media_mix/with_audio.mp4"])
     );
     assert_eq!(media.filter.clone().unwrap().cmd(), test_filter_cmd);
     assert_eq!(media.filter.unwrap().map(), test_filter_map);
@@ -156,7 +156,7 @@ fn dual_audio_input() {
     config.processing.audio_tracks = 2;
     config.processing.add_logo = false;
 
-    let media_obj = Media::new(0, "./assets/dual_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/dual_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let test_filter_cmd = vec_strings![
@@ -168,7 +168,7 @@ fn dual_audio_input() {
 
     assert_eq!(
         media.cmd,
-        Some(vec_strings!["-i", "./assets/dual_audio.mp4"])
+        Some(vec_strings!["-i", "./assets/media_mix/dual_audio.mp4"])
     );
     assert_eq!(media.filter.clone().unwrap().cmd(), test_filter_cmd);
     assert_eq!(media.filter.unwrap().map(), test_filter_map);
@@ -183,8 +183,8 @@ fn video_separate_audio_input() {
     config.processing.audio_tracks = 1;
     config.processing.add_logo = false;
 
-    let mut media_obj = Media::new(0, "./assets/no_audio.mp4", true);
-    media_obj.audio = "./assets/audio.mp3".to_string();
+    let mut media_obj = Media::new(0, "./assets/media_mix/no_audio.mp4", true);
+    media_obj.audio = "./assets/media_mix/audio.mp3".to_string();
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let test_filter_cmd = vec_strings![
@@ -198,11 +198,11 @@ fn video_separate_audio_input() {
         media.cmd,
         Some(vec_strings![
             "-i",
-            "./assets/no_audio.mp4",
+            "./assets/media_mix/no_audio.mp4",
             "-stream_loop",
             "-1",
             "-i",
-            "./assets/audio.mp3",
+            "./assets/media_mix/audio.mp3",
             "-t",
             "30"
         ])
@@ -1350,7 +1350,7 @@ fn video_audio_hls() {
         "/usr/share/ffplayout/public/live/stream.m3u8"
     ]);
 
-    let media_obj = Media::new(0, "./assets/with_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/with_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let enc_prefix = vec_strings![
@@ -1360,7 +1360,7 @@ fn video_audio_hls() {
         "level+error",
         "-re",
         "-i",
-        "./assets/with_audio.mp4"
+        "./assets/media_mix/with_audio.mp4"
     ];
 
     let enc_cmd = prepare_output_cmd(&config, enc_prefix, &media.filter);
@@ -1372,7 +1372,7 @@ fn video_audio_hls() {
         "level+error",
         "-re",
         "-i",
-        "./assets/with_audio.mp4",
+        "./assets/media_mix/with_audio.mp4",
         "-filter_complex",
         "[0:v:0]scale=1024:576[vout0];[0:a:0]anull[aout0]",
         "-map",
@@ -1441,7 +1441,7 @@ fn video_audio_sub_meta_hls() {
         "/usr/share/ffplayout/public/live/stream.m3u8"
     ]);
 
-    let media_obj = Media::new(0, "./assets/with_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/with_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let enc_prefix = vec_strings![
@@ -1451,7 +1451,7 @@ fn video_audio_sub_meta_hls() {
         "level+error",
         "-re",
         "-i",
-        "./assets/with_audio.mp4"
+        "./assets/media_mix/with_audio.mp4"
     ];
 
     let enc_cmd = prepare_output_cmd(&config, enc_prefix, &media.filter);
@@ -1463,7 +1463,7 @@ fn video_audio_sub_meta_hls() {
         "level+error",
         "-re",
         "-i",
-        "./assets/with_audio.mp4",
+        "./assets/media_mix/with_audio.mp4",
         "-filter_complex",
         "[0:v:0]scale=1024:576[vout0];[0:a:0]anull[aout0]",
         "-map",
@@ -1533,7 +1533,7 @@ fn video_multi_audio_hls() {
         "/usr/share/ffplayout/public/live/stream.m3u8"
     ]);
 
-    let media_obj = Media::new(0, "./assets/dual_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/dual_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let enc_prefix = vec_strings![
@@ -1543,7 +1543,7 @@ fn video_multi_audio_hls() {
         "level+error",
         "-re",
         "-i",
-        "./assets/dual_audio.mp4"
+        "./assets/media_mix/dual_audio.mp4"
     ];
 
     let enc_cmd = prepare_output_cmd(&config, enc_prefix, &media.filter);
@@ -1555,7 +1555,7 @@ fn video_multi_audio_hls() {
         "level+error",
         "-re",
         "-i",
-        "./assets/dual_audio.mp4",
+        "./assets/media_mix/dual_audio.mp4",
         "-filter_complex",
         "[0:v:0]scale=1024:576[vout0];[0:a:0]anull[aout0];[0:a:1]anull[aout1]",
         "-map",
@@ -1640,7 +1640,7 @@ fn multi_video_audio_hls() {
         "/usr/share/ffplayout/public/live/stream_%v.m3u8"
     ]);
 
-    let media_obj = Media::new(0, "./assets/with_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/with_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let enc_prefix = vec_strings![
@@ -1650,7 +1650,7 @@ fn multi_video_audio_hls() {
         "level+error",
         "-re",
         "-i",
-        "./assets/with_audio.mp4"
+        "./assets/media_mix/with_audio.mp4"
     ];
 
     let enc_cmd = prepare_output_cmd(&config, enc_prefix, &media.filter);
@@ -1662,7 +1662,7 @@ fn multi_video_audio_hls() {
         "level+error",
         "-re",
         "-i",
-        "./assets/with_audio.mp4",
+        "./assets/media_mix/with_audio.mp4",
         "-filter_complex",
         "[0:v:0]scale=1024:576,split=2[v1_out][v2];[v2]scale=w=512:h=288[v2_out];[0:a]asplit=2[a1][a2]",
         "-map",
@@ -1758,7 +1758,7 @@ fn multi_video_multi_audio_hls() {
         "/usr/share/ffplayout/public/live/stream_%v.m3u8"
     ]);
 
-    let media_obj = Media::new(0, "./assets/dual_audio.mp4", true);
+    let media_obj = Media::new(0, "./assets/media_mix/dual_audio.mp4", true);
     let media = gen_source(&config, media_obj, &playout_stat, &player_control, 1);
 
     let enc_prefix = vec_strings![
@@ -1768,7 +1768,7 @@ fn multi_video_multi_audio_hls() {
         "level+error",
         "-re",
         "-i",
-        "./assets/dual_audio.mp4"
+        "./assets/media_mix/dual_audio.mp4"
     ];
 
     let enc_cmd = prepare_output_cmd(&config, enc_prefix, &media.filter);
@@ -1780,7 +1780,7 @@ fn multi_video_multi_audio_hls() {
         "level+error",
         "-re",
         "-i",
-        "./assets/dual_audio.mp4",
+        "./assets/media_mix/dual_audio.mp4",
         "-filter_complex",
         "[0:v:0]scale=1024:576,split=2[v1_out][v2];[v2]scale=w=512:h=288[v2_out];[0:a:0]anull,asplit=2[a_0_1][a_0_2];[0:a:1]anull,asplit=2[a_1_1][a_1_2]",
         "-map",
diff --git a/tests/src/engine_generator.rs b/tests/src/engine_generator.rs
index 1cb086ce..dbd53859 100644
--- a/tests/src/engine_generator.rs
+++ b/tests/src/engine_generator.rs
@@ -15,10 +15,10 @@ use ffplayout_lib::utils::{
 #[test]
 fn test_random_list() {
     let clip_list = vec![
-        Media::new(0, "./assets/with_audio.mp4", true), // 30 seconds
-        Media::new(0, "./assets/dual_audio.mp4", true), // 30 seconds
-        Media::new(0, "./assets/av_sync.mp4", true),    // 30 seconds
-        Media::new(0, "./assets/ad.mp4", true),         // 25 seconds
+        Media::new(0, "./assets/media_mix/with_audio.mp4", true), // 30 seconds
+        Media::new(0, "./assets/media_mix/dual_audio.mp4", true), // 30 seconds
+        Media::new(0, "./assets/media_mix/av_sync.mp4", true),    // 30 seconds
+        Media::new(0, "./assets/media_mix/ad.mp4", true),         // 25 seconds
     ];
 
     let r_list = random_list(clip_list.clone(), 200.0);
@@ -31,10 +31,10 @@ fn test_random_list() {
 #[test]
 fn test_ordered_list() {
     let clip_list = vec![
-        Media::new(0, "./assets/with_audio.mp4", true), // 30 seconds
-        Media::new(0, "./assets/dual_audio.mp4", true), // 30 seconds
-        Media::new(0, "./assets/av_sync.mp4", true),    // 30 seconds
-        Media::new(0, "./assets/ad.mp4", true),         // 25 seconds
+        Media::new(0, "./assets/media_mix/with_audio.mp4", true), // 30 seconds
+        Media::new(0, "./assets/media_mix/dual_audio.mp4", true), // 30 seconds
+        Media::new(0, "./assets/media_mix/av_sync.mp4", true),    // 30 seconds
+        Media::new(0, "./assets/media_mix/ad.mp4", true),         // 25 seconds
     ];
 
     let o_list = ordered_list(clip_list.clone(), 85.0);
diff --git a/tests/src/engine_playlist.rs b/tests/src/engine_playlist.rs
index a529c390..94a0d796 100644
--- a/tests/src/engine_playlist.rs
+++ b/tests/src/engine_playlist.rs
@@ -6,7 +6,7 @@ use std::{
 use serial_test::serial;
 use simplelog::*;
 
-use ffplayout::output::player;
+use ffplayout::{input::playlist::gen_source, output::player};
 use ffplayout_lib::{utils::*, vec_strings};
 
 fn timed_stop(sec: u64, proc_ctl: ProcessControl) {
@@ -17,6 +17,82 @@ fn timed_stop(sec: u64, proc_ctl: ProcessControl) {
     proc_ctl.stop_all();
 }
 
+#[test]
+#[ignore]
+fn test_gen_source() {
+    let mut config = PlayoutConfig::new(None);
+    config.general.skip_validation = true;
+    config.mail.recipient = "".into();
+    config.processing.mode = Playlist;
+    config.ingest.enable = false;
+    config.text.add_text = false;
+    config.playlist.day_start = "00:00:00".into();
+    config.playlist.start_sec = Some(0.0);
+    config.playlist.length = "24:00:00".into();
+    config.playlist.length_sec = Some(86400.0);
+    config.playlist.path = "assets/playlists".into();
+    config.storage.filler = "assets/media_filler/filler_0.mp4".into();
+    config.logging.log_to_file = false;
+    config.logging.timestamp = false;
+    config.logging.level = LevelFilter::Trace;
+    let play_control = PlayerControl::new();
+    let playout_stat = PlayoutStatus::new();
+
+    let logging = init_logging(&config, None, None);
+    CombinedLogger::init(logging).unwrap_or_default();
+
+    let mut valid_source_with_probe = Media::new(0, "assets/media_mix/av_sync.mp4", true);
+    let valid_media = gen_source(
+        &config,
+        valid_source_with_probe.clone(),
+        &playout_stat,
+        &play_control,
+        100,
+    );
+
+    assert_eq!(valid_source_with_probe.source, valid_media.source);
+
+    let mut valid_source_without_probe = Media::new(0, "assets/media_mix/av_sync.mp4", false);
+    valid_source_without_probe.duration = 30.0;
+    valid_source_without_probe.out = 20.0;
+    let valid_media = gen_source(
+        &config,
+        valid_source_without_probe.clone(),
+        &playout_stat,
+        &play_control,
+        100,
+    );
+
+    assert_eq!(valid_source_without_probe.source, valid_media.source);
+    assert_eq!(valid_media.out, 20.0);
+
+    valid_source_with_probe.out = 0.9;
+
+    let valid_media = gen_source(
+        &config,
+        valid_source_with_probe.clone(),
+        &playout_stat,
+        &play_control,
+        100,
+    );
+
+    assert_eq!(valid_media.out, 1.9);
+
+    let mut no_valid_source_with_probe = Media::new(0, "assets/media_mix/av_snc.mp4", true);
+    no_valid_source_with_probe.duration = 30.0;
+    no_valid_source_with_probe.out = 30.0;
+
+    let valid_media = gen_source(
+        &config,
+        no_valid_source_with_probe.clone(),
+        &playout_stat,
+        &play_control,
+        100,
+    );
+
+    assert_eq!(valid_media.source, "assets/media_filler/filler_0.mp4");
+}
+
 #[test]
 #[serial]
 #[ignore]
@@ -32,7 +108,7 @@ fn playlist_missing() {
     config.playlist.length = "24:00:00".into();
     config.playlist.length_sec = Some(86400.0);
     config.playlist.path = "assets/playlists".into();
-    config.storage.filler = "assets/with_audio.mp4".into();
+    config.storage.filler = "assets/media_filler/filler_0.mp4".into();
     config.logging.log_to_file = false;
     config.logging.timestamp = false;
     config.logging.level = LevelFilter::Trace;
@@ -75,7 +151,7 @@ fn playlist_next_missing() {
     config.playlist.length = "24:00:00".into();
     config.playlist.length_sec = Some(86400.0);
     config.playlist.path = "assets/playlists".into();
-    config.storage.filler = "assets/with_audio.mp4".into();
+    config.storage.filler = "assets/media_filler/filler_0.mp4".into();
     config.logging.log_to_file = false;
     config.logging.timestamp = false;
     config.logging.level = LevelFilter::Trace;
@@ -118,7 +194,7 @@ fn playlist_to_short() {
     config.playlist.length = "24:00:00".into();
     config.playlist.length_sec = Some(86400.0);
     config.playlist.path = "assets/playlists".into();
-    config.storage.filler = "assets/with_audio.mp4".into();
+    config.storage.filler = "assets/media_filler/filler_0.mp4".into();
     config.logging.log_to_file = false;
     config.logging.timestamp = false;
     config.logging.level = log::LevelFilter::Trace;
@@ -161,7 +237,7 @@ fn playlist_init_after_list_end() {
     config.playlist.length = "24:00:00".into();
     config.playlist.length_sec = Some(86400.0);
     config.playlist.path = "assets/playlists".into();
-    config.storage.filler = "assets/with_audio.mp4".into();
+    config.storage.filler = "assets/media_filler/filler_0.mp4".into();
     config.logging.log_to_file = false;
     config.logging.timestamp = false;
     config.logging.level = log::LevelFilter::Trace;
@@ -204,7 +280,7 @@ fn playlist_change_at_midnight() {
     config.playlist.length = "24:00:00".into();
     config.playlist.length_sec = Some(86400.0);
     config.playlist.path = "assets/playlists".into();
-    config.storage.filler = "assets/with_audio.mp4".into();
+    config.storage.filler = "assets/media_filler/filler_0.mp4".into();
     config.logging.log_to_file = false;
     config.logging.timestamp = false;
     config.logging.level = LevelFilter::Trace;
@@ -247,7 +323,7 @@ fn playlist_change_before_midnight() {
     config.playlist.length = "24:00:00".into();
     config.playlist.length_sec = Some(86400.0);
     config.playlist.path = "assets/playlists".into();
-    config.storage.filler = "assets/with_audio.mp4".into();
+    config.storage.filler = "assets/media_filler/filler_0.mp4".into();
     config.logging.log_to_file = false;
     config.logging.timestamp = false;
     config.logging.level = LevelFilter::Trace;
@@ -290,7 +366,7 @@ fn playlist_change_at_six() {
     config.playlist.length = "24:00:00".into();
     config.playlist.length_sec = Some(86400.0);
     config.playlist.path = "assets/playlists".into();
-    config.storage.filler = "assets/with_audio.mp4".into();
+    config.storage.filler = "assets/media_filler/filler_0.mp4".into();
     config.logging.log_to_file = false;
     config.logging.timestamp = false;
     config.out.mode = Null;