I was thinking about j40. It's cool that there's a Rust implementation in progress. If it works out, it will make it much easier for me to support JXL. I've be

I was thinking about j40. It's cool that there's a Rust implementation in progress. If it works out, it will make it much easier for me to support JXL. I've been waiting to RIIR the j40 instead. AVIF (HEIF) container format is MP4, which browsers already parse for video. There is a bit of extra work to extract image-specific data, but it's minor compared to AV1 implementation. AVIF even contains a completely redundant copy of key AV1 metadata (av1C) to spare implementations from parsing the AV1 payload.