decode the codec= string in a media mime type
supports
- HEVC (hvc1, hev1)
- AVC (avc1)
- AAC (mp4a)
- AV1 and IAMF from AOMedia
- E-AC3 (ec-3)
- VP9
- 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
- HDR Vivid - refer to T/UWA 005-2.1
- Install nodejs
- Install required packages:
npm ciCreate the codec-string.js bundles:
npm run buildThis will produce a dist directory with three different flavors of
package:
- ESM module (in the
dist/esmdirectory) - CommonJS module (in the
dist/cjsdirectory) - Legacy global namespace (in the
dist/scriptdirectory)
Each directory will contain a codec-string.js file containing the
library and an example application (app.js and index.html).
import { decode } from 'esm/codec-string.js';
const result = decode('avc1.64002A');
console.dir(result);
const elt = document.createElement('div');
elt.innerHTML = result.toHTML();
document.body.append(elt);See index.d.ts for Typescript types for this library.
import { decode } from 'codec-string';
interface CodecDetails {
label: string;
error?: string;
details: string[];
}
interface CodecInformation {
codec: string;
error?: string;
details: CodecDetails[];
}
const codec = 'avc1.64002A';
const { error, decodes } = decode(codec);
const ci: CodecInformation = {
codec,
error,
details: decodes.map(({parsed, error, label}) => ({
label,
error,
details: parsed.map(p => p.decode),
})),
};const { decode } = require('cjs/codec-string.cjs');
console.dir(decode('avc1.64002A'));To run the Node.js example after building this library:
(cd dist/cjs/ && node ./node_app.cjs )<!doctype html>
<html>
<head>
<script src="script/codec-string.js"></script>
</head>
<body>
<script type="application/javascript">
const result = CodecString.decode('avc1.64002A');
console.dir(result);
const elt = document.createElement('div');
elt.innerHTML = result.toHTML();
document.body.append(elt);
</script>
</body>
</html>Unit tests:
npm run testBrowser based tests:
npm run startIn a browser go to the page http://localhost:8080/tests/index.html this will list all of the available browser-based tests.
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