- help=(
- 'video format code, specify the order of preference using'
- ' slashes, as in -f 22/17/18 . '
- ' Instead of format codes, you can select by extension for the '
- 'extensions aac, m4a, mp3, mp4, ogg, wav, webm. '
- 'You can also use the special names "best",'
- ' "bestvideo", "bestaudio", "worst". '
- ' You can filter the video results by putting a condition in'
- ' brackets, as in -f "best[height=720]"'
- ' (or -f "[filesize>10M]"). '
- ' This works for filesize, height, width, tbr, abr, vbr, asr, and fps'
- ' and the comparisons <, <=, >, >=, =, !='
- ' and for ext, acodec, vcodec, container, and protocol'
- ' and the comparisons =, != .'
- ' Formats for which the value is not known are excluded unless you'
- ' put a question mark (?) after the operator.'
- ' You can combine format filters, so '
- '-f "[height <=? 720][tbr>500]" '
- 'selects up to 720p videos (or videos where the height is not '
- 'known) with a bitrate of at least 500 KBit/s.'
- ' By default, youtube-dl will pick the best quality.'
- ' Use commas to download multiple audio formats, such as'
- ' -f 136/137/mp4/bestvideo,140/m4a/bestaudio.'
- ' You can merge the video and audio of two formats into a single'
- ' file using -f <video-format>+<audio-format> (requires ffmpeg or'
- ' avconv), for example -f bestvideo+bestaudio.'))