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[extractor/common] Add ability to specify custom field preference for _sort_formats

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This commit is contained in:
Sergey M․ 2015-04-20 21:13:31 +06:00
parent b524a001d6
commit 3ded7bac16
1 changed files with 4 additions and 1 deletions
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5
youtube_dl/extractor/common.py
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@ -708,7 +708,7 @@ def _twitter_search_player(self, html):
return self._html_search_meta('twitter:player', html,
'twitter card player')
def _sort_formats(self, formats):
def _sort_formats(self, formats, field_preference=None):
if not formats:
raise ExtractorError('No video formats found')
@ -718,6 +718,9 @@ def _formats_key(f):
if not f.get('ext') and 'url' in f:
f['ext'] = determine_ext(f['url'])
if isinstance(field_preference, (list, tuple)):
return tuple(f.get(field) if f.get(field) is not None else -1 for field in field_preference)
preference = f.get('preference')
if preference is None:
proto = f.get('protocol')