Relation between bufsize and maxrate(minrate)

[TheFunkyDude]

Hi..

I use CRF for encoding and most to the times video output turns to be good but 2/10 video encodes get like really low bitrate and the quality turns out to be really bad. so i want to set minrate for a video...

Like whatever the encode is the video bitrate should not be lesser than 500kbps but not sure how to achieve that. I was going through x265 documentation and found out about --vbv-bufsize and --vbv-maxrate.

I want to use minrate instead of maxrate. Is it possible to do so? if yes what will be bufsize?

[jagabo]

Maybe you should be looking at qpmax.