How to implement AVMutableComposition to edit/merge AVAssets and display results using AVPlayer object in swift 3 w/ device auth check and alert actions
https://developer.apple.com/documentation/avfoundation/avmutablecomposition
How to implement AVMutableComposition to edit/merge AVAssets and display results using AVPlayer object in swift 3 w/ device auth check and alert actions
https://developer.apple.com/documentation/avfoundation/avmutablecomposition