Experimental
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
BCD tables only load in the browser