AVAssetTrackMBS.AVKeyValueStatusCancelled = 4

Type	Topic	Plugin	Version
const	AVFoundation	MBS AVFoundation Plugin	13.2

One of the constants to indicate the load status of a property.

Indicates that the attempt to load the property was cancelled.

AVAssetTrackMBS.AVKeyValueStatusFailed = 3

Type	Topic	Plugin	Version
const	AVFoundation	MBS AVFoundation Plugin	13.2

One of the constants to indicate the load status of a property.

Indicates that the attempt to load the property failed.

AVAssetTrackMBS.AVKeyValueStatusLoaded = 2

Type	Topic	Plugin	Version
const	AVFoundation	MBS AVFoundation Plugin	13.2

One of the constants to indicate the load status of a property.

Indicates that the property is ready for use.

AVAssetTrackMBS.AVKeyValueStatusLoading = 1

Type	Topic	Plugin	Version
const	AVFoundation	MBS AVFoundation Plugin	13.2

One of the constants to indicate the load status of a property.

Indicates that the property is not fully loaded.

AVAssetTrackMBS.AVKeyValueStatusUnknown = 0

Type	Topic	Plugin	Version
const	AVFoundation	MBS AVFoundation Plugin	13.2

One of the constants to indicate the load status of a property.

Indicates that the property status is unknown.