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xiph / rav1e

The fastest and safest AV1 encoder.
BSD 2-Clause "Simplified" License
3.7k stars 252 forks source link

Support lossless mode! #151

Open ycho opened 6 years ago

ycho commented 6 years ago

Won't do this.

tdaede commented 5 years ago

Someone had an interesting use case of encoding MAME files, e.g. og.kervella.org/pt.7z

This is low priority but no reason not to implement it.

ycho commented 5 years ago

Sure, rav1e always can encode losslessly. I believe AV1 do that with only using 4x4 DCTs as transform, correct?

tdaede commented 5 years ago

There's a special 4x4 transform that we currently don't have. That's the main thing missing.

cryptomilk commented 4 years ago

I've implemented support for importing and exporting AVIF images in darktable using libavif. I would be interested to have lossless support using rav1e.

https://blog.cryptomilk.org/2019/11/26/avif-image-support-for-darktable/

cryptomilk commented 4 years ago

We have added support for importing and exporting AVIF files in darktable which will be released with version 3.0.1. It would be great to have this fixed in rav1e soon.

eclipseo commented 3 years ago

Any chance of this issue seeing some love?

CartoonFan commented 2 years ago

I'd like to voice my support for this feature as well :heart: :pray:

EDIT: I also realized that this issue is relevant to #2759, since aomenc can do lossless already.

CartoonFan commented 8 months ago

Just now seeing the recent commit here. Has there been any progress on lossless encoding? :eyes: