TrackDefault

Draft
This page is not complete.

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The TrackDefault interface provides a SourceBuffer with kind, label, and language information for tracks that do not contain this information in the initialization segments of a media chunk.

A TrackDefault object is provided to a SourceBuffer object by setting its SourceBuffer.trackDefaults property.

Constructor

TrackDefault(): Constructs and returns a new TrackDefault object.

Properties

TrackDefault.type Read only: Returns the type of track that this SourceBuffer's media segment data relates to (i.e. audio, video, or text track.)
TrackDefault.byteStreamTrackID Read only: Returns the ID of the specific track that the SourceBuffer should apply to.
TrackDefault.language Read only: Returns the default language to use when an initialization segment does not contain language information for a new track.
TrackDefault.label Read only: Returns the default label to use when an initialization segment does not contain label information for a new track.
TrackDefault.kinds Read only: Returns the default kinds used when an initialization segment does not contain kind information for a new track.

Examples

TBD

Specifications

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

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`TrackDefault` ExperimentalNon-standard	Chrome ?	Edge Full support Yes	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android No support No	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
`TrackDefault()` constructor ExperimentalNon-standard	Chrome ?	Edge Full support Yes	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android No support No	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
`byteStreamTrackID` ExperimentalNon-standard	Chrome ?	Edge Full support Yes	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android No support No	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
`kinds` ExperimentalNon-standard	Chrome ?	Edge Full support Yes	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android No support No	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
`label` ExperimentalNon-standard	Chrome ?	Edge Full support Yes	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android No support No	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
`language` ExperimentalNon-standard	Chrome ?	Edge Full support Yes	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android No support No	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
`type` ExperimentalNon-standard	Chrome ?	Edge Full support Yes	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android No support No	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.: Non-standard. Expect poor cross-browser support.