TrackDefault - Web APIs 编辑

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This feature is obsolete.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

BCD tables only load in the browser

See also

• MediaSource
• SourceBuffer
• TrackDefaultList