help='"best", "aac", "vorbis", "mp3", "m4a", "opus", or "wav"; best by default')
postproc.add_option('--audio-quality', metavar='QUALITY', dest='audioquality', default='5',
help='ffmpeg/avconv audio quality specification, insert a value between 0 (better) and 9 (worse) for VBR or a specific bitrate like 128K (default 5)')
help='"best", "aac", "vorbis", "mp3", "m4a", "opus", or "wav"; best by default')
postproc.add_option('--audio-quality', metavar='QUALITY', dest='audioquality', default='5',
help='ffmpeg/avconv audio quality specification, insert a value between 0 (better) and 9 (worse) for VBR or a specific bitrate like 128K (default 5)')