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
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.
Examples
TBD
Specifications
| Specification | Status | Comment |
|---|---|---|
| Media Source Extensions The definition of 'TrackDefault' in that specification. |
Recommendation | Initial definition. |
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.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome ? | Edge Full support Yes | Firefox No support No | IE ? | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Edge Mobile Full support Yes | Firefox Android No support No | Opera Android ? | Safari iOS No support No | Samsung Internet Android ? |
TrackDefault() constructor | Chrome ? | Edge Full support Yes | Firefox No support No | IE ? | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Edge Mobile Full support Yes | Firefox Android No support No | Opera Android ? | Safari iOS No support No | Samsung Internet Android ? |
byteStreamTrackID | Chrome ? | Edge Full support Yes | Firefox No support No | IE ? | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Edge Mobile Full support Yes | Firefox Android No support No | Opera Android ? | Safari iOS No support No | Samsung Internet Android ? |
kinds | Chrome ? | Edge Full support Yes | Firefox No support No | IE ? | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Edge Mobile Full support Yes | Firefox Android No support No | Opera Android ? | Safari iOS No support No | Samsung Internet Android ? |
label | Chrome ? | Edge Full support Yes | Firefox No support No | IE ? | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Edge Mobile Full support Yes | Firefox Android No support No | Opera Android ? | Safari iOS No support No | Samsung Internet Android ? |
language | Chrome ? | Edge Full support Yes | Firefox No support No | IE ? | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Edge Mobile Full support Yes | Firefox Android No support No | Opera Android ? | Safari iOS No support No | Samsung Internet Android ? |
type | Chrome ? | Edge Full support Yes | Firefox No support No | IE ? | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Edge Mobile Full support Yes | 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.
See also
Document Tags and Contributors
Tags:
Contributors to this page:
fscholz,
chrisdavidmills
Last updated by:
fscholz,