- help='subtitle format [srt/sbv/vtt] (default=srt) (currently youtube only)', default='srt')
- video_format.add_option('--sub-lang', '--srt-lang',
- action='store', dest='subtitleslang', metavar='LANG',
- help='language of the subtitles to download (optional) use IETF language tags like \'en\'')
+ help='subtitle format (default=srt) ([sbv/vtt] youtube only)', default='srt')
+ subtitles.add_option('--sub-lang', '--sub-langs', '--srt-lang',
+ action='callback', dest='subtitleslangs', metavar='LANGS', type='str',
+ default=[], callback=_comma_separated_values_options_callback,
+ help='languages of the subtitles to download (optional) separated by commas, use IETF language tags like \'en,pt\'')
+
+ downloader.add_option('-r', '--rate-limit',
+ dest='ratelimit', metavar='LIMIT', help='maximum download rate in bytes per second (e.g. 50K or 4.2M)')
+ downloader.add_option('-R', '--retries',
+ dest='retries', metavar='RETRIES', help='number of retries (default is %default)', default=10)
+ downloader.add_option('--buffer-size',
+ dest='buffersize', metavar='SIZE', help='size of download buffer (e.g. 1024 or 16K) (default is %default)', default="1024")
+ downloader.add_option('--no-resize-buffer',
+ action='store_true', dest='noresizebuffer',
+ help='do not automatically adjust the buffer size. By default, the buffer size is automatically resized from an initial value of SIZE.', default=False)
+ downloader.add_option('--test', action='store_true', dest='test', default=False, help=optparse.SUPPRESS_HELP)