AV1

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AV1 CRF default? (lemmy.world)

submitted 1 year ago by [email protected] to c/[email protected]

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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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[–] [email protected] 2 points 1 year ago

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

[–] [email protected] 2 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.

[–] [email protected] 0 points 1 year ago

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.

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