Loop AVMutableCompositionTrack

Question

I have got two audio tracks on me that I combine with one another like this:

AVMutableComposition *composition = [[AVMutableComposition alloc] init];

AVMutableC         


        

Answer 1

On the Gaurav response you should change this line:
audioDuration = CMTimeSubtract(totalDuration,videoDuration);

to:
audioDuration = CMTimeSubtract(videoDuration,currentTime);

Otherwise the audiotrack will be longer than the video ( that will be just black )