for source in video_data.findall('closedCaptions/source'):
for track in source.findall('track'):
track_url = track.get('url')
- if not track_url:
+ if not isinstance(track_url, compat_str) or track_url.endswith('/big'):
continue
lang = track.get('lang') or track.get('label') or 'en'
subtitles.setdefault(lang, []).append({