244 lines
7.2 KiB
Python
244 lines
7.2 KiB
Python
# -*- coding: utf-8 -*-
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# This file is part of ffplayout.
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#
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# ffplayout is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# ffplayout is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with ffplayout. If not, see <http://www.gnu.org/licenses/>.
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# ------------------------------------------------------------------------------
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import math
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import os
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from .utils import _pre_comp
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# ------------------------------------------------------------------------------
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# building filters,
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# when is needed add individuell filters to match output format
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# ------------------------------------------------------------------------------
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def deinterlace_filter(probe):
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"""
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when material is interlaced,
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set deinterlacing filter
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"""
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filter_chain = []
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if 'field_order' in probe.video[0] and \
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probe.video[0]['field_order'] != 'progressive':
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filter_chain.append('yadif=0:-1:0')
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return filter_chain
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def pad_filter(probe):
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"""
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if source and target aspect is different,
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fix it with pillarbox or letterbox
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"""
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filter_chain = []
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if not math.isclose(probe.video[0]['aspect'],
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_pre_comp.aspect, abs_tol=0.03):
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if probe.video[0]['aspect'] < _pre_comp.aspect:
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filter_chain.append(
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'pad=ih*{}/{}/sar:ih:(ow-iw)/2:(oh-ih)/2'.format(_pre_comp.w,
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_pre_comp.h))
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elif probe.video[0]['aspect'] > _pre_comp.aspect:
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filter_chain.append(
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'pad=iw:iw*{}/{}/sar:(ow-iw)/2:(oh-ih)/2'.format(_pre_comp.h,
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_pre_comp.w))
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return filter_chain
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def fps_filter(probe):
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"""
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changing frame rate
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"""
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filter_chain = []
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if probe.video[0]['fps'] != _pre_comp.fps:
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filter_chain.append('fps={}'.format(_pre_comp.fps))
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return filter_chain
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def scale_filter(probe):
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"""
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if target resolution is different to source add scale filter,
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apply also an aspect filter, when is different
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"""
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filter_chain = []
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if int(probe.video[0]['width']) != _pre_comp.w or \
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int(probe.video[0]['height']) != _pre_comp.h:
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filter_chain.append('scale={}:{}'.format(_pre_comp.w, _pre_comp.h))
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if not math.isclose(probe.video[0]['aspect'],
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_pre_comp.aspect, abs_tol=0.03):
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filter_chain.append('setdar=dar={}'.format(_pre_comp.aspect))
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return filter_chain
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def fade_filter(duration, seek, out, track=''):
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"""
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fade in/out video, when is cutted at the begin or end
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"""
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filter_chain = []
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if seek > 0.0:
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filter_chain.append('{}fade=in:st=0:d=0.5'.format(track))
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if out != duration:
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filter_chain.append('{}fade=out:st={}:d=1.0'.format(track,
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out - seek - 1.0))
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return filter_chain
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def overlay_filter(duration, ad, ad_last, ad_next):
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"""
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overlay logo: when is an ad don't overlay,
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when ad is comming next fade logo out,
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when clip before was an ad fade logo in
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"""
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logo_filter = '[v]null[logo]'
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if _pre_comp.add_logo and os.path.isfile(_pre_comp.logo) and not ad:
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logo_chain = []
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opacity = 'format=rgba,colorchannelmixer=aa={}'.format(
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_pre_comp.opacity)
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loop = 'loop=loop=-1:size=1:start=0'
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logo_chain.append(
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'movie={},{},{}'.format(_pre_comp.logo, loop, opacity))
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if ad_last:
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logo_chain.append('fade=in:st=0:d=1.0:alpha=1')
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if ad_next:
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logo_chain.append('fade=out:st={}:d=1.0:alpha=1'.format(
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duration - 1))
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logo_filter = '{}[l];[v][l]{}:shortest=1[logo]'.format(
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','.join(logo_chain), _pre_comp.logo_filter)
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return logo_filter
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def add_audio(probe, duration, msg):
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"""
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when clip has no audio we generate an audio line
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"""
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line = []
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if not probe.audio:
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msg.warning('Clip "{}" has no audio!'.format(probe.src))
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line = [
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'aevalsrc=0:channel_layout=2:duration={}:sample_rate={}'.format(
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duration, 48000)]
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return line
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def add_loudnorm(probe):
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"""
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add single pass loudnorm filter to audio line
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"""
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loud_filter = []
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if probe.audio and _pre_comp.add_loudnorm:
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loud_filter = [('loudnorm=I={}:TP={}:LRA={}').format(
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_pre_comp.loud_i, _pre_comp.loud_tp, _pre_comp.loud_lra)]
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return loud_filter
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def extend_audio(probe, duration):
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"""
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check audio duration, is it shorter then clip duration - pad it
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"""
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pad_filter = []
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if probe.audio and 'duration' in probe.audio[0] and \
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duration > float(probe.audio[0]['duration']) + 0.3:
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pad_filter.append('apad=whole_dur={}'.format(duration))
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return pad_filter
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def extend_video(probe, duration, target_duration):
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"""
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check video duration, is it shorter then clip duration - pad it
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"""
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pad_filter = []
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if 'duration' in probe.video[0] and \
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target_duration < duration > float(
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probe.video[0]['duration']) + 0.3:
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pad_filter.append('tpad=stop_mode=add:stop_duration={}'.format(
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duration - float(probe.video[0]['duration'])))
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return pad_filter
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def build_filtergraph(duration, seek, out, ad, ad_last, ad_next, probe, msg):
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"""
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build final filter graph, with video and audio chain
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"""
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video_chain = []
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audio_chain = []
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video_map = ['-map', '[logo]']
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if out > duration:
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seek = 0
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if probe.video[0]:
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video_chain += deinterlace_filter(probe)
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video_chain += pad_filter(probe)
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video_chain += fps_filter(probe)
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video_chain += scale_filter(probe)
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video_chain += extend_video(probe, duration, out - seek)
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video_chain += fade_filter(duration, seek, out)
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audio_chain += add_audio(probe, out - seek, msg)
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if not audio_chain:
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audio_chain.append('[0:a]anull')
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audio_chain += add_loudnorm(probe)
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audio_chain += extend_audio(probe, out - seek)
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audio_chain += fade_filter(duration, seek, out, 'a')
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if video_chain:
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video_filter = '{}[v]'.format(','.join(video_chain))
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else:
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video_filter = 'null[v]'
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logo_filter = overlay_filter(out - seek, ad, ad_last, ad_next)
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video_filter = [
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'-filter_complex', '[0:v]{};{}'.format(
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video_filter, logo_filter)]
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if audio_chain:
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audio_filter = [
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'-filter_complex', '{}[a]'.format(','.join(audio_chain))]
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audio_map = ['-map', '[a]']
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else:
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audio_filter = []
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audio_map = ['-map', '0:a']
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if probe.video[0]:
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return video_filter + audio_filter + video_map + audio_map
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else:
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return video_filter + video_map + ['-map', '1:a']
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