[core] Re-work format_note display in format list with abbreviated codec name

youtube_dl/YoutubeDL.py

@@ -2404,60 +2404,52 @@ class YoutubeDL(object):
         return res
 
     def _format_note(self, fdict):
-        res = ''
-        if fdict.get('ext') in ['f4f', 'f4m']:
-            res += '(unsupported) '
-        if fdict.get('language'):
-            if res:
-                res += ' '
-            res += '[%s] ' % fdict['language']
-        if fdict.get('format_note') is not None:
-            res += fdict['format_note'] + ' '
-        if fdict.get('tbr') is not None:
-            res += '%4dk ' % fdict['tbr']
+
+        def simplified_codec(f, field):
+            assert field in ('acodec', 'vcodec')
+            codec = f.get(field)
+            return (
+                'unknown' if not codec
+                else '.'.join(codec.split('.')[:4]) if codec != 'none'
+                else 'images' if field == 'vcodec' and f.get('acodec') == 'none'
+                else None if field == 'acodec' and f.get('vcodec') == 'none'
+                else 'audio only' if field == 'vcodec'
+                else 'video only')
+
+        res = join_nonempty(
+            fdict.get('ext') in ('f4f', 'f4m') and '(unsupported)',
+            fdict.get('language') and ('[%s]' % (fdict['language'],)),
+            fdict.get('format_note') is not None and fdict['format_note'],
+            fdict.get('tbr') is not None and ('%4dk' % fdict['tbr']),
+            delim=' ')
+        res = [res] if res else []
         if fdict.get('container') is not None:
-            if res:
-                res += ', '
-            res += '%s container' % fdict['container']
-        if (fdict.get('vcodec') is not None
-                and fdict.get('vcodec') != 'none'):
-            if res:
-                res += ', '
-            res += fdict['vcodec']
-            if fdict.get('vbr') is not None:
-                res += '@'
+            res.append('%s container' % (fdict['container'],))
+        if fdict.get('vcodec') not in (None, 'none'):
+            codec = simplified_codec(fdict, 'vcodec')
+            if codec and fdict.get('vbr') is not None:
+                codec += '@'
         elif fdict.get('vbr') is not None and fdict.get('abr') is not None:
-            res += 'video@'
-        if fdict.get('vbr') is not None:
-            res += '%4dk' % fdict['vbr']
+            codec = 'video@'
+        else:
+            codec = None
+        codec = join_nonempty(codec, fdict.get('vbr') is not None and ('%4dk' % fdict['vbr']))
+        if codec:
+            res.append(codec)
         if fdict.get('fps') is not None:
-            if res:
-                res += ', '
-            res += '%sfps' % fdict['fps']
-        if fdict.get('acodec') is not None:
-            if res:
-                res += ', '
-            if fdict['acodec'] == 'none':
-                res += 'video only'
-            else:
-                res += '%-5s' % fdict['acodec']
-        elif fdict.get('abr') is not None:
-            if res:
-                res += ', '
-            res += 'audio'
-        if fdict.get('abr') is not None:
-            res += '@%3dk' % fdict['abr']
-        if fdict.get('asr') is not None:
-            res += ' (%5dHz)' % fdict['asr']
+            res.append('%sfps' % (fdict['fps'],))
+        codec = (
+            simplified_codec(fdict, 'acodec') if fdict.get('acodec') is not None
+            else 'audio' if fdict.get('abr') is not None else None)
+        if codec:
+            res.append(join_nonempty(
+                '%-4s' % (codec + (('@%3dk' % fdict['abr']) if fdict.get('abr') else ''),),
+                fdict.get('asr') and '(%5dHz)' % fdict['asr'], delim=' '))
         if fdict.get('filesize') is not None:
-            if res:
-                res += ', '
-            res += format_bytes(fdict['filesize'])
+            res.append(format_bytes(fdict['filesize']))
         elif fdict.get('filesize_approx') is not None:
-            if res:
-                res += ', '
-            res += '~' + format_bytes(fdict['filesize_approx'])
-        return res
+            res.append('~' + format_bytes(fdict['filesize_approx']))
+        return ', '.join(res)
 
     def list_formats(self, info_dict):
         formats = info_dict.get('formats', [info_dict])

youtube_dl/extractor/youtube.py

@@ -1669,10 +1669,12 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         '_rtmp': {'protocol': 'rtmp'},
 
         # av01 video only formats sometimes served with "unknown" codecs
-        '394': {'acodec': 'none', 'vcodec': 'av01.0.05M.08'},
-        '395': {'acodec': 'none', 'vcodec': 'av01.0.05M.08'},
-        '396': {'acodec': 'none', 'vcodec': 'av01.0.05M.08'},
-        '397': {'acodec': 'none', 'vcodec': 'av01.0.05M.08'},
+        '394': {'acodec': 'none', 'vcodec': 'av01.0.00M.08'},
+        '395': {'acodec': 'none', 'vcodec': 'av01.0.00M.08'},
+        '396': {'acodec': 'none', 'vcodec': 'av01.0.01M.08'},
+        '397': {'acodec': 'none', 'vcodec': 'av01.0.04M.08'},
+        '398': {'acodec': 'none', 'vcodec': 'av01.0.05M.08'},
+        '399': {'acodec': 'none', 'vcodec': 'av01.0.08M.08'},
     }
 
     _PLAYER_JS_VARIANT_MAP = (