help='Convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)')
postproc.add_option(
'--audio-format', metavar='FORMAT', dest='audioformat', default='best',
help='Convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)')
postproc.add_option(
'--audio-format', metavar='FORMAT', dest='audioformat', default='best',