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Avif YUV444 decoding support

Open kaixinol opened this issue 7 months ago • 2 comments

Is your feature request related to a problem? Please describe. I'm unable to view AVIF images encoded with YUV 4:4:4 chroma subsampling.

Describe the solution you'd like I would like the software to add support for decoding and displaying AVIF images encoded with YUV 4:4:4.

Describe alternatives you've considered As an alternative, the software could automatically fall back to displaying the image in YUV 4:2:2 when YUV 4:4:4 is not supported. This would allow the image to remain viewable, even if with slightly reduced quality.

Additional context

kaixinol avatar Jul 17 '25 05:07 kaixinol

Could you please share a sample (original without any modification)?

deckerst avatar Jul 17 '25 17:07 deckerst

Could you please share a sample (original without any modification)?

This is a test image I drew with krita, saved with YUV444 precision.

unnamed.zip

The preview image is not displayed

Image

Clicking on the image directly will render it white.

Image

However, if you open it from other applications(e.g. telegram) and select ave as the opening method, it can be rendered correctly

kaixinol avatar Jul 18 '25 02:07 kaixinol