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   Gianni Rosato (gianni@disobey.net)'s status on Thursday, 10-Jul-2025 04:59:33 JST Gianni Rosato

   in reply to

   @kornel Thank you! Hoping it will provide value for someone :)

   The chroma subsampling is difficult … I’ve done a couple of things in Iris to mitigate its negative impact, but it remains a challenge.

   As for testing, I think the most valuable test would be the one on the Iris webpage (https://halide.cx/iris/index.html).

   Daala’s subset2 source images are all 4:2:0 which is unfortunate, but the numbers look similar with 4:4:4 subset1 (couldn’t find the same for subset2) favoring AVIF a bit.