AVCompositionTrack Class Reference
Available in iOS 4.0 and later.
AVCompositionTrack object provides the low-level representation of tracks a track in an
AVComposition object, comprising a media type, a track identifier, and an array of
AVCompositionTrackSegment objects, each comprising a URL, and track identifier, and a time mapping.
timeMapping.target.start of the first track segment in a composition track is
kCMTimeZero, and the
timeMapping.target.start of each subsequent track segment equals
The AVFoundation framework also provides a mutable subclass,
Accessing Track Segments
The composition track’s track segments. (read-only)
- Available in iOS 4.0 and later.