mutableTrack(compatibleWith:)
Provides a reference to a track from a mutable movie into which you can insert any time range.
Declaration
func mutableTrack(compatibleWith track: AVAssetTrack) -> AVMutableMovieTrack?Parameters
- track:
The Avassettrack containing the desired time range.
Return Value
An AVMutableMovieTrack object that can accommodate the time range insertion. Returns nil when no track is available.
Discussion
Keep the number of tracks in a movie to a minimum, corresponding to the number of tracks for which media data must be presented in parallel. If media data of the same type is presented serially, even from multiple assets, a single track of that media type should be used. This method can help the client to identify an existing target track for an insertion.