- preference using slashes: -f 22/17/18 . -f
- mp4 , -f m4a and -f flv are also
- supported. You can also use the special
- names "best", "bestvideo", "bestaudio",
- "worst", "worstvideo" and "worstaudio". By
+ 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, and vbr
+ 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