[FFmpeg-user] Which parameter for WEBM VP8/Vorbis quality depending on resolution?

[Lou]

On Wed, 3 Apr 2013 17:47:02 +0200 (CEST)
tag at gmx.com wrote:

> Tom Evans wrote:
> > You can use the -crf argument, which sets a quality setting for the
> > final video, not a bitrate. I believe this works with libvpx.
> 
> ffmpeg -i 12082012.mp4 -crf 10 12082012.mp4_crf10.webm
> ffmpeg -i 12082012.mp4 -crf 20 12082012.mp4_crf20.webm
> ffmpeg -i 12082012.mp4 -crf 40 12082012.mp4_crf40.webm
> 
> -crf 10: Filesize 11716 KB
> -crf 20: Filesize 11716 KB
> -crf 40: Filesize 11716 KB
> 
> Seems it does not work. Default 200 kb/s stays active all the time.
> 
> Are there other options?

See the vpx (WebM) Encoding Guide:
https://ffmpeg.org/trac/ffmpeg/wiki/vpxEncodingGuide