This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The endOfStream()
method of the MediaSource
interface signals the end of the stream.
Syntax
mediaSource.endOfStream(endOfStreamError);
Parameters
- endOfStreamError Optional
- A
DOMString
representing an error to throw when the end of the stream is reached. The possible values are:network
: Terminates playback and signals that a network error has occured. This can be used create a custom error handler related to media streams. For example, you might have a function that handles media chunk requests, separate from other network requests. When you make an XMLHttpRequest call for a media chunk, andonabort
oronerror
triggers, you might want to callendOfStream('network')
, display a descriptive message in the UI, and maybe retry the network request immediately or wait until the network is back up (via some kind of polling.)decode
: Terminates playback and signals that a decoding error has occured. This can be used to indicate that a parsing error has occured while fetching media data; maybe the data is corrupt, or is encoded using a codec that the browser doesn't know how to decode.
Returns
Void.
Errors
The following errors may be thrown when setting a new value for this property.
Error | Explanation |
---|---|
InvalidStateError |
MediaSource.readyState is not equal to open , or one or more of the SourceBuffer objects in MediaSource.sourceBuffers are being updated (i.e. their SourceBuffer.updating property is true .) |
Example
The following snippet is from a simple example written by Nick Desaulniers (view the full demo live, or download the source for further investigation.)
var assetURL = 'frag_bunny.mp4';
// Need to be specific for Blink regarding codecs
// ./mp4info frag_bunny.mp4 | grep Codec
var mimeCodec = 'video/mp4; codecs="avc1.42E01E, mp4a.40.2"';
if ('MediaSource' in window && MediaSource.isTypeSupported(mimeCodec)) {
var 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);
}
function sourceOpen (_) {
//console.log(this.readyState); // open
var mediaSource = this;
var sourceBuffer = mediaSource.addSourceBuffer(mimeCodec);
fetchAB(assetURL, function (buf) {
sourceBuffer.addEventListener('updateend', function (_) {
mediaSource.endOfStream();
video.play();
//console.log(mediaSource.readyState); // ended
});
sourceBuffer.appendBuffer(buf);
});
};
Specifications
Specification | Status | Comment |
---|---|---|
Media Source Extensions The definition of 'endOfStream()' in that specification. |
Candidate Recommendation | Initial definition. |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | 23 | (Yes) | 25.0 (25.0)[1] 42.0 (42.0) |
11[2] | 15 | 8 |
Feature | Android | Edge | Firefox Mobile (Gecko) | Firefox OS (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|
Basic support | 4.4.4 | (Yes) |
No support |
No support | 11 | 30 | No support |
[1] Available after switching the about:config
preference media.mediasource.enabled
to true
. In addition, support was limited to a whitelist of sites, for example YouTube, Netflix, and other popular streaming sites. The whitelist was removed and Media Source Extensions was enabled by default in 42+ for all sites.
[2] Only works on Windows 8+.