This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The duration
property of the MediaSource
interface gets and sets the duration of the current media being presented.
Syntax
mediaSource.duration = 5.5; // 5.5 seconds var myDuration = mediaSource.duration;
Value
A double. A value in seconds is expected.
Exceptions
The following exceptions may be thrown when setting a new value for this property.
Exception | Explanation |
---|---|
InvalidAccessError |
An attempt was made to set a duration value that was negative, or NaN . |
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 based on a simple example written by Nick Desaulniers (view the full demo live, or download the source for further investigation.)
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();
mediaSource.duration = 120;
video.play();
//console.log(mediaSource.readyState); // ended
});
sourceBuffer.appendBuffer(buf);
});
};
...
Specifications
Specification | Status | Comment |
---|---|---|
Media Source Extensions The definition of 'duration' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
duration | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 25 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 1.5 |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.