[unlord]

> While that most definitely is a consideration, AVIF lacks many features and much of the functionality offered by JPEG XL.

What features are these? You have not named a single concrete advantage. The places where AVIF out-performs JPEG XL are exactly where it make sense as an image format for the web: high fidelity images with bit rates at or below 1 bit/pixel. Nobody is browsing the web on a 16-bit panel and AVIF supports 12bpc images anyway.

Unfortunately, JPEG XL authors chose not include AVIF when they performed a subjective image comparison in 2020 under controlled viewing conditions (https://research.google/pubs/benchmarking-jpeg-xl-lossylossl...), but previous subjective studies showed AVIF outperforming PIK and FUIF over the evaluated bit-rates.

[janwas]

I'm curious what the evidence is for AVIF outperforming below 1bpp?

Have you seen this more recent data that includes AVIF? https://cloudinary.com/labs/cid22

[unlord]

> Have you seen this more recent data that includes AVIF? https://cloudinary.com/labs/cid22

The graph from Cloudinary uses libaom to do the encoding at speed preset 7 (aom s7), which is far from speed preset 0 and disables many AVIF coding tools. I do not know why this was chosen by the author, but it does not reflect AVIF performance. According to https://github.com/AOMediaCodec/libavif/issues/440#issuecomm... speed preset 8 loses 20-35% compression efficiency.

[redeeman]

how about a conversion path for regular legacy jpeg? and look at cloudinary, jpeg-xl is superior in quality to avif