Default to previous method of detecting MP3

Author: plotski

pythonbits/bb.py

@@ -456,7 +456,8 @@ def _render_video_codec(self):
 
     def _render_audio_codec(self):
         audio_track = self['tracks']['audio'][0]  # main audio track
-        if audio_track['codec_id_hint'] == 'MP3':
+        if (audio_track.get('codec_id_hint') == 'MP3' or
+            audio_track['codec_id'] in ('MPA1L3', '55')):
             return 'MP3'
         elif audio_track['codec_id'].lower().startswith('mp4a'):
             return 'AAC'