GitHub - Vanilagy/mp4-muxer: MP4 multiplexer in pure TypeScript with support for WebCodecs API, video & audio.
GitHub - DolbyLaboratories/dlb_mp4base: The Dolby MP4 streaming muxer (dlb_mp4base) is a software implementation of a muxer of fragmented or unfragmented ISO base media file format (mp4). It supports muxing of Dolby Digital (