AVMutableComposition - Blank/Black frame between videos assets

Question

I\'m currently trying to put 5 videos back to back using AVMutableComposition like so:

[mixComposition insertTimeRange:CMTimeRangeMake(kCMTimeZero, asset1.du         


        

Answer 1

I just met the same problem. Turn out the solution is using AVMutableCompositionTrack and compositing the video tracks, something like this.

AVMutableCompositionTrack * videoTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];

[videoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, asset.duration) ofTrack:[[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:composition.duration error:&error];

For the audio part I think you must add a separate track with AVMediaTypeAudio type.