On Mon, 27 Nov, 2023, 4:16 am Ferdi Scholten, <fe...@sttc-nlp.nl> wrote:
> What is the quality rate control when encoding in VBR mode ? > > I get message : > > > > Svt[warn]: The input q value is ignored in vbr mode 20 when I set the > -crf > > to 20 when enabling the -svtav1-params rc=1. > > When I set -qp 20, the conversion fails. > > > > Which mode to set quality when encoding in VBR mode ? > > > vbr encoding does not support quality setting, you get the maximum > quality that fits the specified bitrate and it uses lower bitrates if > possible if the content does not require high bitrates. > > > If you want CRF with a cap on the bitrate you need to set mbr > (MaximumBitRate) > > -crf 20 -svtav1-params mbr=5000k > > You do not need to specify rc=0, because that is default. You also do not > specify -b:v 5000k > > > Or if you want VBR > > -svtav1-params rc=1 -b:v 5000k > > No quality settings like crf or qp as they require rc=0 you can however > set -qmin (default 1) and -qmax (default 63) > > > OR if you want CQP > > -qp 20 -svtparams aq-mode=0 -b:v 5000k > > qp only works when aq-mode=0 (default aq-mode=2) > > > Hope that helps? > Yes, that helped me a lot. Thank you sir for your help 🙏 > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".