- 'title': '%s - %s' % (a.performer, title) if a.performer else title,
- 'thumbnail': a.cover_url.split(',') if a.cover_url else None,
- 'duration': a.duration,
+ 'title': '%s - %s' % (performer, title) if performer else title,
+ 'thumbnails': [{'url': c_url} for c_url in a.cover_url.split(',')] if a.cover_url else None,
+ 'duration': int_or_none(a.duration),