Provides a reference to a track from a mutable movie into which any time range can be inserted.
- iOS 13.0+
- macOS 10.11+
- Mac Catalyst 13.0+
- watchOS 6.0+
AVAssetcontaining the desired time range.
AVMutable object that can accommodate the time range insertion. Returns nil when no track is available.
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.