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This feature is obsolete.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
TrackDefaultobject.
Properties
TrackDefault.typeRead only- Returns the type of track that this
SourceBuffer's media segment data relates to (i.e. audio, video, or text track.) TrackDefault.byteStreamTrackIDRead only- Returns the ID of the specific track that the
SourceBuffershould apply to. TrackDefault.languageRead only- Returns the default language to use when an initialization segment does not contain language information for a new track.
TrackDefault.labelRead only- Returns the default label to use when an initialization segment does not contain label information for a new track.
TrackDefault.kindsRead only- Returns the default kinds used when an initialization segment does not contain kind information for a new track.
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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
TrackDefault | Chrome ? | Edge Full support ≤18 | 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 | Chrome ? | Edge Full support ≤18 | 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 | Chrome ? | Edge Full support ≤18 | 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 | Chrome ? | Edge Full support ≤18 | 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 | Chrome ? | Edge Full support ≤18 | 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 | Chrome ? | Edge Full support ≤18 | 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 | Chrome ? | Edge Full support ≤18 | 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.