mux.js
A collection of lightweight utilities for inspecting and manipulating video container formats.
canvas-record
Record a video in the browser or directly on the File System from a canvas (2D/WebGL/WebGPU) as MP4, WebM, MKV, GIF, PNG/JPG Sequence using WebCodecs and wasm when available.
node-video-lib
Node.js Video Library / MP4 & FLV parser / MP4 builder / HLS muxer