+ # Auto generate title fields corresponding to the *_number fields when missing
+ # in order to always have clean titles. This is very common for TV series.
+ for field in ('chapter', 'season', 'episode'):
+ if info_dict.get('%s_number' % field) is not None and not info_dict.get(field):
+ info_dict[field] = '%s %d' % (field.capitalize(), info_dict['%s_number' % field])
+
+ subtitles = info_dict.get('subtitles')
+ if subtitles:
+ for _, subtitle in subtitles.items():
+ for subtitle_format in subtitle:
+ if 'ext' not in subtitle_format:
+ subtitle_format['ext'] = determine_ext(subtitle_format['url']).lower()
+