Why is h264 encoder included in webm version?

[davedoesdev]

https://github.com/Kagami/ffmpeg.js/blob/master/Makefile#L11

[1kilogram]

I think he's just too lazy to optimize it

@davedoesdev Maybe you know how to do your own assembly?

Tell me how to do or maybe there is a ready-made assembly, which translates video from .mp4 container into .gif animation, or outputs in an array of each frame, which can then be translated into a picture? Preferably without WASM but in pure js. No more than 5 mb in size.