[VideoConvertor] Ensure all streams are copied

Closes #3200

diff --git a/yt_dlp/postprocessor/ffmpeg.py b/yt_dlp/postprocessor/ffmpeg.py
index ec618b0408b2e4947f2a81ab6332df110fde73c5..a5ed6d184a99acefb4c423ab1d798aa84f200ede 100644 (file)
--- a/yt_dlp/postprocessor/ffmpeg.py
+++ b/yt_dlp/postprocessor/ffmpeg.py
@@ -553,9 +553,9 @@ def _target_ext(self, source_ext):
 
     @staticmethod
     def _options(target_ext):
+        yield from FFmpegPostProcessor.stream_copy_opts(False)
         if target_ext == 'avi':
-            return ['-c:v', 'libxvid', '-vtag', 'XVID']
-        return []
+            yield from ('-c:v', 'libxvid', '-vtag', 'XVID')
 
     @PostProcessor._restrict_to(images=False)
     def run(self, info):