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codec-string

decode the codec= string in a media mime type

supports

  • HEVC (hvc1, hev1)
  • AVC (avc1)
  • AAC (mp4a)
  • AV1 (av01)
  • E-AC3 (ec-3) - no processing required
  • VP9 - see https://www.webmproject.org/vp9/mp4/
  • EVC - refer annex E.9 of ISO/IEC 14496-15:2022
  • VVC - refer annex E.6 of ISO/IEC 14496-15:2022
  • MPEG-H
  • AVS3 video and audio
  • AVS2 audio
  • LCEVC - refer to ISO/IEC 14496-15:2022 Amd.1

Installation

  • Install nodejs
  • Install required packages:
npm ci

Create the codec-string.js bundles:

npm run build

This will produce a dist directory with three different flavors of package:

  • ESM module (in the dist/esm directory)
  • CommonJS module (in the dist/cjs directory)
  • Legacy global namespace (in the dist/script directory)

Each directory will contain a codec-string.js file containing the library and an example application (app.js and index.html).

Usage

ESM module

import { decode } from 'esm/codec-string.js';

console.log(decode('avc1.64002A'));

CommonJS module

const { decode } = require('cjs/codec-string.js');

console.log(decode('avc1.64002A'));

Legacy

<!doctype html>
<html>
<head>
<script src="script/codec-string.js"></script>
</head>
<body>
<script type="application/javascript">
console.log(window.CodecString.decode('avc1.64002A'));
</script>
</body>
</html>

License

This software is distributed under the terms of the Simplified BSD License. See the file LICENSE.txt for details.

Copyright (c) 2021-2024, Paul Higgs
All rights reserved