This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for the proper prefixes to use in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the spec changes.
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The trackDefaults property of the SourceBuffer interface specifies the default values to use if kind, label, and/or language information is not available in the initialization segment of the media to be appended to the SourceBuffer.
var myTrackDefaults = sourceBuffer.trackDefaults; sourceBuffer.trackDefaults = myTrackDefaultList;
A TrackDefaultList object.
The following errors may be thrown when setting a new value for this property.
| Error | Explanation |
|---|---|
InvalidStateError | One or more of the SourceBuffer objects in MediaSource.sourceBuffers are being updated (i.e. their SourceBuffer.updating property is currently true), or this SourceBuffer has been removed from the MediaSource. |
TBD
| Specification | Status | Comment |
|---|---|---|
| Media Source Extensions The definition of 'trackDefaults' in that specification. | Candidate Recommendation | Initial definition. |
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | ? | Not supported | ? | ? | ? |
| Feature | Android | Firefox Mobile (Gecko) | Firefox OS (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | ? | Not supported | Not supported | ? | ? | Not supported |
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https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/trackDefaults