findUnusedTrackID(completionHandler:)
Loads an identifier that no other track in the asset uses.
Declaration
func findUnusedTrackID(completionHandler: @escaping @Sendable (CMPersistentTrackID, (any Error)?) -> Void)func findUnusedTrackID() async throws -> CMPersistentTrackIDParameters
- completionHandler:
A completion handler the system calls after it finishes the request.