AV1

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AV1 CRF default? (lemmy.world)

submitted 2 years 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 2 points 2 years ago

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

[–] b1tstremist0@lemmy.world 2 points 2 years ago* (last edited 2 years 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.

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