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Fixed comments and added more supported formats

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sergeidanilov 2023-11-12 23:40:55 -08:00
parent fc46f24dc5
commit 523c7e1d44
1 changed files with 19 additions and 8 deletions
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27
yt_dlp/postprocessor/ffmpeg.py
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@ -1047,21 +1047,32 @@ class FFmpegSplitChaptersPP(FFmpegPostProcessor):
['-ss', str(chapter['start_time']),
'-t', str(chapter['end_time'] - chapter['start_time'])])
# Extends opts with chapter specific metadata for the supported formats.
#
# Tested and supported on opus, m4a, webm and mp4.
def _set_metadata_arg(self, opts, ext, key, value):
if ext == 'opus':
# opus file requires a stream to keep title, artist etc metadata.
# FFmpegMetadataPP already set metadata and created that stream.
# Futher metadata updates should be set on the stream(:s)
# -metadata will do nothing and needs to be -metadata:s
opts.extend(['-metadata:s', f'{key}={value}'])
elif ext in ['m4a', 'webm', 'mp4']:
opts.extend(['-metadata', f'{key}={value}'])
# FFmpeg adds metadata about all chapters from parent file to all split m4a files.
# This is incorrect since there must be only single chapter in each file after split.
# Such behavior confuses players who think multiple chapters present
def _set_out_opts(self, ext, chapter_title):
def _set_out_opts(self, ext, chapter_title, track_number):
out_opts = [*self.stream_copy_opts()]
out_opts.extend(['-map_metadata', '0'])
# exclude chapters metadata but keep everything else
out_opts.extend(['-map_chapters', '-1'])
if not chapter_title:
return out_opts
# replace global title with chapter specific title in split files
if ext == 'm4a':
out_opts.extend(['-metadata', 'title={}'.format(chapter_title)])
if ext == 'opus':
out_opts.extend(['-metadata:s', 'title={}'.format(chapter_title)])
if chapter_title:
self._set_metadata_arg(out_opts, ext, "title", chapter_title)
self._set_metadata_arg(out_opts, ext, "track", track_number)
return out_opts
@PostProcessor._restrict_to(images=False)
@ -1078,7 +1089,7 @@ class FFmpegSplitChaptersPP(FFmpegPostProcessor):
self.to_screen('Splitting video by chapters; %d chapters found' % len(chapters))
for idx, chapter in enumerate(chapters):
destination, opts = self._ffmpeg_args_for_chapter(idx + 1, chapter, info)
out_file_opts = self._set_out_opts(info['ext'], chapter.get('title', ''))
out_file_opts = self._set_out_opts(info['ext'], chapter.get('title', ''), str(idx + 1))
self.real_run_ffmpeg([(in_file, opts)], [(destination, out_file_opts)])
if in_file != info['filepath']:
self._delete_downloaded_files(in_file, msg=None)