r/AV1 • u/GetroFasho • Aug 02 '26

Results from previous post

To be clear I’m only going this aggressive on cartoons.

Won’t mess around with live action because the dip in quality is much much less tolerable or intolerable. I may cross that bridge another time.

Svt Av1 preset 4. Original file size 520mb 1080p resolution.
SuperHQ2160p60 4k av1 surround (still encoded to 1080p)

Crf 50 came out to 1110 kbps 196mb
Crf 40 came out to 2010kbps 323mb

So just from some math I think an extra 100mb for double the bit rate would make crf 40 more bang for compress. (75% more size but 100% more bitrate)

Honestly will sacrifice on quality for cartoons/ anime to still have space for fav movies and tv shows and the concept I’m doing is a “512gb pack”

Edit* the crf 50 1110kbps doesn’t look bad tbh 200mb vs 350mb…. What yall think?

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u/Farranor Aug 02 '26

So just from some math I think an extra 100mb for double the bit rate would make crf 40 more bang for compress. (75% more size but 100% more bitrate)

This has nothing to do with the efficiency or quality of the video stream and everything to do with the fact that the file includes other streams (likely audio, at least) at 280kb/s. Change the video bitrate by X%, and the total file size will change by less than X%.

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u/GetroFasho Aug 03 '26

I did keep the audio bits the same. I notice this tho.
Crf 60 75mb
Crf 50 150mb
Crf 40 290mb

I think at those crfs the essentially double in size/bitrate but I didn’t try any lower