Use field_preference parameter.

youtube_dl/extractor/youtube.py

@@ -769,69 +769,6 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         """Indicate the download will use the RTMP protocol."""
         self.to_screen('RTMP download detected')
 
-    def _sort_formats(self, formats, field_preference=None):
-        if not formats:
-            raise ExtractorError('No video formats found')
-
-        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'])
-
-            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')
-                if proto is None:
-                    proto = compat_urllib_parse_urlparse(f.get('url', '')).scheme
-
-                preference = 0 if proto in ['http', 'https'] else -0.1
-                if f.get('ext') in ['f4f', 'f4m']:  # Not yet supported
-                    preference -= 0.5
-
-            if f.get('vcodec') == 'none':  # audio only
-                if self._downloader.params.get('prefer_free_formats'):
-                    ORDER = ['aac', 'mp3', 'm4a', 'webm', 'ogg', 'opus']
-                else:
-                    ORDER = ['webm', 'opus', 'ogg', 'mp3', 'aac', 'm4a']
-                ext_preference = 0
-                try:
-                    audio_ext_preference = ORDER.index(f['ext'])
-                except ValueError:
-                    audio_ext_preference = -1
-            else:
-                if self._downloader.params.get('prefer_free_formats'):
-                    ORDER = ['flv', 'mp4', 'webm']
-                else:
-                    ORDER = ['webm', 'flv', 'mp4']
-                try:
-                    ext_preference = ORDER.index(f['ext'])
-                except ValueError:
-                    ext_preference = -1
-                audio_ext_preference = 0
-
-            return (
-                preference,
-                f.get('language_preference') if f.get('language_preference') is not None else -1,
-                f.get('quality') if f.get('quality') is not None else -1,
-                f.get('height') if f.get('height') is not None else -1,
-                f.get('width') if f.get('width') is not None else -1,
-                f.get('tbr') if f.get('tbr') is not None else -1,
-                f.get('filesize') if f.get('filesize') is not None else -1,
-                f.get('vbr') if f.get('vbr') is not None else -1,
-                ext_preference,
-                f.get('abr') if f.get('abr') is not None else -1,
-                audio_ext_preference,
-                f.get('fps') if f.get('fps') is not None else -1,
-                f.get('filesize_approx') if f.get('filesize_approx') is not None else -1,
-                f.get('source_preference') if f.get('source_preference') is not None else -1,
-                f.get('format_id') if f.get('format_id') is not None else '',
-            )
-        formats.sort(key=_formats_key)
-
     def _signature_cache_id(self, example_sig):
         """ Return a string representation of a signature """
         return '.'.join(compat_str(len(part)) for part in example_sig.split('.'))
@@ -1614,7 +1551,10 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                     if f.get('vcodec') != 'none':
                         f['stretched_ratio'] = ratio
 
-        self._sort_formats(formats)
+        # YouTube reports total bitrate inaccurately for some videos. Compensate by prioritizing picture size.
+        self._sort_formats(formats, field_preference=('preference', 'language_preference', 'quality', 'height', 'width',
+            'ext_preference', 'tbr', 'filesize', 'vbr', 'abr', 'audio_ext_preference', 'fps', 'filesize_approx',
+            'source_preference'))
 
         return {
             'id': video_id,