mp4box.js

mp4box.js is a JavaScript port of the GPAC MP4Box tool, enabling developers to parse, demux, and manipulate MP4 files directly in the browser or Node.js without server-side dependencies. It is designed for web developers and media engineers who need to inspect or repackage video files client-side, such as for adaptive streaming or custom playback workflows. Its interest lies in bringing a powerful, traditionally command-line multimedia tool into the browser, unlocking new possibilities for in-browser video processing and analysis.