Play Matroska (MKV) files inside your browser.
Modern web browsers only support the WebM container format that is based on Matroska, but limited to royalty-free codecs. Even when the MKV file contains media encoded by a codec that the browser is able to decode, most browsers are unable to play media in such a container. This project copies the underlying media streams to containers that are supported by most browsers (e.g. mp4, webm) inside the browser without third-party extensions or programs. This is achieved by remuxing media segments with ffmpeg compiled to webassembly (thanks to the ffmpeg.wasm project) using web workers. Remuxed chunks are sent from the Web Worker to the main thread and appended to the HTML5 video element using Media Source Extensions.
This project uses SharedArrayBuffer, for which the following COOP/COEP HTTP headers need to be returned by the server hosting the web page to enable the JavaScript feature:
Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: require-corp