format['url'] = sanitize_url(format['url'])
if format.get('ext') is None:
format['ext'] = determine_ext(format['url']).lower()
+ if format['ext'] in ('aac', 'opus', 'mp3', 'flac', 'vorbis'):
+ if format.get('acodec') is None:
+ format['acodec'] = format['ext']
if format.get('protocol') is None:
format['protocol'] = determine_protocol(format)
if format.get('resolution') is None: