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A comment on The case against JPEG XL. Parent comment

Re:The case against JPEG XL by account42 on Monday September 14, 2026 @04:48AM (#49693805)
It's not lossless if you have to convert to YUV first.
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Re:The case against JPEG XL by jaffathecake on Monday September 14, 2026 @05:34AM (#49694155)
You are correct. However, AVIF does not require this conversion. For lossless it supports an "identity" matrix coefficient, which means no conversion.

It isn't particularly efficient in terms of file size, but as others have said, lossless images within a web page is extremely niche.

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Re:The case against JPEG XL by edflsafoiewq on Monday September 14, 2026 @06:00AM (#49694378)
It has YCgCo too, which should have the efficiency of YCbCr while being lossless.
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