def _sort_formats(self, formats):
def _formats_key(f):
+ # TODO remove the following workaround
+ from ..utils import determine_ext
+ if not f.get('ext') and 'url' in f:
+ f['ext'] = determine_ext(f['url'])
+
preference = f.get('preference')
if preference is None:
preference = 0 if f.get('url', '').startswith('http') else -0.1