submitted 1 year ago by smalitro@lemmy.world to c/av1@lemmy.world

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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.

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[-] kwm1800@lemmy.world 1 points 1 year ago

It really depends on the encoder, but it seems 18~20 is good for SVT-AV1.

[-] b1tstremist0@lemmy.world 1 points 1 year ago* (last edited 1 year ago)

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.

this post was submitted on 19 Jul 2023

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