* [WebVideo2NAS v2.3.0](https://github.com/asdfghj1237890/WebVideo2NAS) – Chrome extension plus NAS Docker backend to detect, queue, download, and convert M3U8/MP4 streams into MP4 files for NAS storage.

* [go-mp4 v1.6.0](https://github.com/abema/go-mp4) – Go library providing low-level read/write and box-level parsing/building of MP4 files.

* [mp4ff v0.52.0](https://github.com/Eyevinn/mp4ff) – Library and tools for parsing and writing fragmented and progressive MP4 files with support for multiple video, audio, subtitle, and metadata codecs.

* [xgplayer v3.0.25-alpha.1](https://github.com/bytedance/xgplayer) – Web video player library with detachable UI, staged MP4 loading, and FLV, HLS, and DASH live/on-demand support.