AVAssetTrackGroup Class Reference
Available in iOS 7.0 and later.
AVAssetTrackGroup class encapsulates a single group of related tracks in an asset.
AVAssetTrackGroup describe a single group of related alternate tracks, only one of which should be played at a time. Groups of alternate tracks typically contain variations of the same content, such as subtitles in multiple translations.
Getting Track ID Values
The IDs of the tracks in the group. (read-only)
- Available in iOS 7.0 and later.