diff --git a/ffplayout.py b/ffplayout.py
index 3dd63a11..dad1efb1 100755
--- a/ffplayout.py
+++ b/ffplayout.py
@@ -37,7 +37,7 @@ except ImportError:
     print('colorama import failed, no colored console output on windows...')
 
 _WINDOWS = os.name == 'nt'
-COPY_BUFSIZE = 1024 * 1024 if _WINDOWS else 64 * 1024
+COPY_BUFSIZE = 1024 * 1024 if _WINDOWS else 65424
 
 
 # ------------------------------------------------------------------------------