vvenc icon indicating copy to clipboard operation
vvenc copied to clipboard

Published 20 hours ago • verified publisher icon fraunhoferhhi

Info for CQF

Open thx4ever opened this issue 1 year ago • 6 comments

Hi, can u show some examples How to use CQF mode?

Regards

thx4ever avatar May 19 '24 11:05 thx4ever

@thx4ever I don't see any paramerters in --fullhelp yet. It would be for next version.

@adamjw24 Anyway I also want to ask: Does CQF work similarly to x264/x265 CRF?

ZenKiyoshi avatar May 20 '24 05:05 ZenKiyoshi

CQF is similar to CRF in x265/x264, which means it is rate capped constant quality encoding.

Constant quality, i.e. --qp XY --qpa 1. Capped, i.e. --maxrate YZ. So thats the three params you use for CQF. --qpa 1 is the default, so can be skipped.

Best, Adam

adamjw24 avatar May 21 '24 08:05 adamjw24

CQF is similar to CRF in x265/x264, which means it is rate capped constant quality encoding.

Constant quality, i.e. --qp XY --qpa 1. Capped, i.e. --maxrate YZ. So thats the three params you use for CQF. --qpa 1 is the default, so can be skipped.

Best, Adam

You mean --qp -qpa 1 --MaxBitrate?

thx4ever avatar May 22 '24 02:05 thx4ever

You mean --qp -qpa 1 --MaxBitrate?

No, I mean --qp A --qpa 1 --maxrate B, thats for vvencapp tho. For the vvencFFapp the params are different.

adamjw24 avatar May 22 '24 09:05 adamjw24

Im currently using vvencFFapp can u show me how to do it?

Regards

thx4ever avatar May 22 '24 18:05 thx4ever

You mean --qp -qpa 1 --MaxBitrate?

For vvencFFapp, --QP=A -qpa 1 --MaxBitrate=B (-qpa 1 is the same as --PerceptQPA=1) seems the way to go. Mind that -qpa 1 is not the default, so this has to be specified.

adamjw24 avatar May 23 '24 08:05 adamjw24