Animated avif

Demo

source: https://www.youtube.com/watch?v=rVJOfnMrF_s

Convert from any video

Local

1. ffmpeg -i any.{mp4,mkv,...} -o tmp.y4m
2. avifenc -j all tmp.y4m any.avif

In browser // TODO

Previous art:

1. @ffmpeg/wasm
2. @saschazar/wasm-avif
3. GoogleChromeLabs/squoosh/blob/dev/codecs/avif

Existing libavif's wasm build doesn't seem to support y4m input yet. It looks doable via adapting

1. GoogleChromeLabs/squoosh/blob/dev/codecs/avif/enc/avif_enc.cpp
2. AOMediaCodec/libavif/apps/avifenc.c
3. AOMediaCodec/libavif/apps/shared/y4m.c