[FFmpeg-user] CBR with libvpx using latest ffmpeg

[Manas Bhatnagar]

Hello,

Just updating this in case anyone else tries to do something similar.
I have been working on this, trying to produce media files with predictable
filesizes/bitrates using ffmpeg/libvpx. I am able to get good results using
a 2-pass approach.

*************************************************
ffmpeg -i video.mkv -pass 1 -s 640x357 -c:v libvpx -b:v 450k -minrate:v
450k -maxrate:v 450k -bufsize 128k -threads 4 -f rawvideo -an -y /dev/null
ffmpeg -i video.mkv -pass 2 -s 640x357 -c:v libvpx -b:v 450k -minrate:v
450k -maxrate:v 450k -bufsize 128k -q:a -1 -threads 4 video.webm
*************************************************

This is what works to my satisfaction.

Thanks,
Manas