TrackDefault

Obsolete
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

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.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
TrackDefault
ExperimentalNon-standard
Chrome ? Edge Full support ā‰¤18Firefox No support NoIE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android No support NoOpera Android ? Safari iOS No support NoSamsung Internet Android ?
TrackDefault() constructor
ExperimentalNon-standard
Chrome ? Edge Full support ā‰¤18Firefox No support NoIE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android No support NoOpera Android ? Safari iOS No support NoSamsung Internet Android ?
byteStreamTrackID
ExperimentalNon-standard
Chrome ? Edge Full support ā‰¤18Firefox No support NoIE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android No support NoOpera Android ? Safari iOS No support NoSamsung Internet Android ?
kinds
ExperimentalNon-standard
Chrome ? Edge Full support ā‰¤18Firefox No support NoIE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android No support NoOpera Android ? Safari iOS No support NoSamsung Internet Android ?
label
ExperimentalNon-standard
Chrome ? Edge Full support ā‰¤18Firefox No support NoIE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android No support NoOpera Android ? Safari iOS No support NoSamsung Internet Android ?
language
ExperimentalNon-standard
Chrome ? Edge Full support ā‰¤18Firefox No support NoIE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android No support NoOpera Android ? Safari iOS No support NoSamsung Internet Android ?
type
ExperimentalNon-standard
Chrome ? Edge Full support ā‰¤18Firefox No support NoIE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android No support NoOpera Android ? Safari iOS No support NoSamsung Internet Android ?

Legend

Full support Ā 
Full support
No support Ā 
No support
Compatibility unknown Ā 
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.

See also