@mediabunny/prores

Browsers have no support for Apple ProRes in their WebCodecs implementations. This extension package provides a decoder for use with Mediabunny, allowing you to decode ProRes directly in the browser at unprecedented speed. It is implemented using Mediabunny's custom coder API and uses TurboRes, an extremely fast WASM-based ProRes decoder, under the hood.

GitHub page

Installation

This library peer-depends on Mediabunny. Install both using npm:

npm install mediabunny @mediabunny/prores

Alternatively, directly include them using a script tag:

<script src="mediabunny.js"></script>
<script src="mediabunny-prores.js"></script>

This will expose the global objects Mediabunny and MediabunnyProres. Use mediabunny-prores.d.ts to provide types for these globals. You can download the built distribution files from the releases page.

Setup

@mediabunny/prores can make use of shared-memory multithreading to achieve maximum performance. To enable this in browsers, your website must be cross-origin isolated by setting the following response headers:

Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: require-corp

Alternatively, you can use:

Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: credentialless

which is generally more permissive but is not supported in Safari (of course).

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If you cannot enable cross-origin isolation, @mediabunny/prores will fall back to a slower multithreading algorithm.

Usage

import { registerProresDecoder } from '@mediabunny/prores';

registerProresDecoder();

That's it - Mediabunny now uses the registered ProRes decoder automatically.