Brightness (colors) of AVIF file depends on viewer application about cavif HOT 6 OPEN

firefox currently has a bug where all AVIF appear to be darker, even if they're lossless. It's the same for all encoders (gimp as well) it is a firefox issue. No idea about the others.

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I agree that it's probably the problem of Firefox. Viewing on chrome seems normal.

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Firefox AVIF dev here:

out-cavif.avif from the attached demo archive is full range, BT.2020 primaries, BT.2020 10-bit transfer function, identity matrix.

out-internet.avif is limited range and primaries, transfer function and matrix are all "unspecified", which defaults to BT.709 per MIAF.

With regards to Firefox's rendering of the first there are two issues:

1. AVIF files tagged with full range are decoded as limited range
2. AVIF support for 10-bit or 12-bit channels (full pipeline support is a bigger issue, but this issue is for tone-mapping, so that things look more correct when putting 10-bit into a 8-bit space)

The full-range issue should hopefully be addressed soon, the tonemapping is likely to take longer. In the meantime, you should get better results using bt709 and/or limited range.

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@baumanj Thanks for you comment!

I've abandoned AVIF for quite some time now, because Linux and iOS support is still non-existent. I want AVIF to work on these platforms too before I make a full shift. JPEG XL has also arrived now, so it's all getting more heated up.

I made a post on Reddit, and essentially asked the same question as here: AVIF images color loss/change

You can view the post by heading to the link. I tested several scenarios, and the best settings for AVIF seem to be (YUV444, full) --cicp 1/13/1, which I've (admbot is my name there) also posted with an explanation as to why it is the best setting. I hope that things improve...

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@darkcharmander Linux "support is still non-existent" uhh I wouldn't go that far... what are you calling "support"? thumbnails work by default for over a year on several distros file managers (thunar, nemo, etc)... Windows requires an extension for it to work, which is provided on the windows store. No idea about iOS or OS X, they're pretty irrelevant, but I know they love HEIC.

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Apple hasn't released any information about their plans for official iOS or macOS support, but there is https://github.com/dreampiggy/AVIFQuickLook, which I've found useful.

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