AV1 CRF default?
AV1 CRF default?
Ffmpeg AV1 is a fantastic codec. Open and promising a better compression ratio than HEVC / AVC.
However I am unclear right now about the possible CRF settings.
x264 defaults to a CRF of 23 x265 defaults to a CRF to 28
These two seem to have a similar visual quality for me.
What is the corresponding CRF for AV1 – what CRF has a similar quality and what is the default?
Please excuse if this question was asked before. I googled and searched reddit. However I only found complicated answers wits PSNR etc but no simply estimate answer.
It really depends on the encoder, but it seems 18~20 is good for SVT-AV1.
The default is 35. My rule is to use 4 points greater value than the CRF of x265. However, AV1 isn't good with fine details, so consider using lower CRF accordingly if compression isn't affected by it much.
I'm trying a 1080 bluray rip I did at crf 30. I read somewhere that I should using preset 4.1 and between 28 and 35 for 1080... I'll let you how how it comes out in 15 hours lol.