Info for CQF

Question

Info for CQF

thx4ever opened this issue 5 months ago · 6 comments

thx4ever commented 5 months ago

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

Regards

Answer 1 · 2024-05-20T05:47:25.000Z

@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?

Answer 2 · 2024-05-21T08:13:09.000Z

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

Answer 3 · 2024-05-22T02:09:23.000Z

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?

Answer 4 · 2024-05-22T09:22:16.000Z

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.

Answer 5 · 2024-05-22T18:35:42.000Z

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

Regards

Answer 6 · 2024-05-23T08:00:43.000Z

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.