This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
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
var myTrackDefaults = sourceBuffer.trackDefaults; sourceBuffer.trackDefaults = myTrackDefaultList;
The following exceptions may be thrown when setting a new value for this property.
||One or more of the
BCD tables only load in the browser