AVFoundation - Video didn't play in AVMutablecomposition with AVplayer - ios

Question

I am working on playing a online video file with AVplayer using AVMutablecomposition. The Video plays very fine when I play it on browser but I just cant get it play on my iPad.
Here's the code:
self.composition = [AVMutableComposition composition];
NSURL *urlVideo = [NSURL URLWithString:#"{video location}"];
AVURLAsset *videoAsset = [[AVURLAsset alloc]initWithURL:urlVideo options:nil];
AVMutableCompositionTrack *compositionVideoTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
NSError *error = NULL;
AVAssetTrack *videoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo]objectAtIndex:0];
CMTimeRange x = CMTimeRangeMake(kCMTimeZero, [videoAsset duration]);
[compositionVideoTrack insertTimeRange:x ofTrack:videoTrack atTime:kCMTimeZero error:nil];
And the code to set the AVPlayer:
AVPlayerItem *playerItem = [[AVPlayerItem alloc]initWithAsset:composition];
self.player = [[AVPlayer alloc]initWithPlayerItem:playerItem];
AVPlayerLayer *layerVideo = [AVPlayerLayer playerLayerWithPlayer:self.player];
layerVideo.frame = self.view.layer.bounds;
layerVideo.backgroundColor = [UIColor orangeColor].CGColor;
layerVideo.position = CGPointMake(1024/2, 768/2-10);
[self.view.layer addSublayer:layerVideo];
[self.player play];
If I use "AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:videoAsset];" instead of "AVPlayerItem *playerItem = [[AVPlayerItem alloc]initWithAsset:composition];" then I can see the video playing.
Anyone know how to play the video using AVplayer with AVMutablecomposition ?

Answer 1

Your code lacks a couple error checkings but it works as is.
Unless you're in an iPad this line will send the player off-screen:
layerVideo.position = CGPointMake(1024/2, 768/2-10);
If that's the case, try with the right position.