Prism - H.264 decoder in pure javascript
Logo by Jiangnan Zhuang
Prism is a H.264 decoder written in javascript(ES5), which is used in browser to decode H.264 stream data into RGBA/YCbCr format frames.
Prism can run in browsers support javascript ES5 or higher standard, and support H.264 realtime decoding profile which contains I/P frames.
Prism is a project of CloudwareHub, aiming at providing cross platform video stream decoder.
Build
Prism depends on Node.js, npm, gruntjs. Execute commands below to build prism, and the built file prism.min.js should be generated in build/ folder.
$ npm install
$ bower install
$ grunt
Usage
Prism uses requirejs/almod to package, and export window.prism if not in AMD context.
The typical usage of prism should work with websocket, just read raw H.264 nal data from server via websocket and feed into prism, than prism will decode every frame into RGBA/YCbCr format pictures.
Sample code is as follows:
ws.onmessage = function(msg) {
prism.decodeNal(msg);
console.log(prism.SL) // decoded frame luma in xy format
console.log(prism.SCb, prism.SCr) //decoded frame chroma cb/cr in xy format
}
The demo effect of prism is available at CloudwareHub.
License
BSD-2-Clause