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MediaSource: MediaSource() constructor - Web APIs | MDN
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MediaSource: MediaSource() constructor
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Note: This feature is available in Dedicated Web Workers.
The MediaSource() constructor of the
MediaSource interface constructs and returns a new
MediaSource object with no associated source buffers.
Syntax
js
new MediaSource()
Parameters
None.
Examples
The following snippet is taken from an example written by Nick Desaulniers (view the full demo live, or download the source for further investigation).
js
const video = document.querySelector("video");
const assetURL = "frag_bunny.mp4";
// Need to be specific for Blink regarding codecs
// ./mp4info frag_bunny.mp4 | grep Codec
const mimeCodec = 'video/mp4; codecs="avc1.42E01E, mp4a.40.2"';
if ("MediaSource" in window && MediaSource.isTypeSupported(mimeCodec)) {
const mediaSource = new MediaSource();
// console.log(mediaSource.readyState); // closed
video.src = URL.createObjectURL(mediaSource);
mediaSource.addEventListener("sourceopen", sourceOpen);
} else {
console.error("Unsupported MIME type or codec: ", mimeCodec);
}
// …
Specifications
| Specification |
|---|
| Media Source Extensions™ # dom-mediasource-constructor |
Browser compatibility
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