yt_dlp/postprocessor/embedthumbnail.py

@@ -96,10 +96,12 @@ class EmbedThumbnailPP(FFmpegPostProcessor):
                 try:
                     self._report_run('mutagen', filename)
                     audio = mutagen.id3.ID3(filename)
+                    if 'APIC' in audio:
+                        del audio['APIC']
                     with open(thumbnail_filename, 'rb') as thumbfile:
                         audio['APIC'] = mutagen.id3.APIC(
-                            encoding=mutagen.id3.Encoding.UTF8, mime=f'image/{thumbnail_ext}',
+                            encoding=mutagen.id3.Encoding.UTF8, mime='image/%s' % thumbnail_ext, type=3,
-                            type=mutagen.id3.PictureType.COVER_FRONT, desc='Cover (front)', data=thumbfile.read())
+                            desc=u'Cover (front)', data=thumbfile.read())
                     audio.save()
                     temp_filename = filename  # Mutagen saves to the original file
                 except Exception as err:

yt_dlp/postprocessor/ffmpeg.py

@@ -674,15 +674,17 @@ class FFmpegEmbedSubtitlePP(FFmpegPostProcessor):
         if len(sub_dict) > 1:
             self.report_warning('More than one subtitle file found. Your media player will likely be unable to display all of them.')
 
-        if not all(sub['ext'] == 'lrc' for sub in sub_dict.values()):
+        if sub_dict[list(sub_dict.keys())[0]]['ext'] != 'lrc':
             raise PostProcessingError('LRC subtitles required. Use "--convert-subs lrc" to convert')
 
-        lyrics_list = [sub['data'] for sub in sub_dict.values()]
+        lyrics_list = []
+        for lyrics in sub_dict.keys():
+            lyrics_list.append(sub_dict[lyrics]['data'])
         if audio_file.endswith('.mp3'):
-            audio = mutagen.id3.ID3(audio_file)
             for lyrics in lyrics_list:
-                audio.add(mutagen.id3.USLT(encoding=mutagen.id3.Encoding.UTF8, lang='und', text=lyrics))
+                audio = mutagen.id3.ID3(audio_file)
-            audio.save()
+                audio.add(mutagen.id3.USLT(encoding=3, lang='und', desc='', text=lyrics))
+                audio.save()
         else:
             metadata = mutagen.File(audio_file)
             metadata['©lyr' if audio_file.endswith('.m4a') else 'lyrics'] = lyrics_list