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Check the Browser compatibility table carefully before using this in production.

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The byteStreamTrackID read-only property of the TrackDefault interface returns the ID of the specific track that the SourceBuffer should apply to.

If not specified in the constructor, this value will be an empty string and the SourceBuffer can contain any tracks of the specified TrackDefault.type.


var myID = TrackDefault.byteStreamTrackID;


A DOMString.




Specification Status Comment
Media Source Extensions
The definition of 'byteStreamTrackID' in that specification.
Recommendation Initial definition.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support ? No support ? ? ?
Feature Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ?

No support

No support ? ? No support

See also

Document Tags and Contributors

Contributors to this page: chrisdavidmills
Last updated by: chrisdavidmills,