Badhan Ganesh Badhan Ganesh - 1 month ago 80
Objective-C Question

iOS 10 - AVPlayer shows black screen when playing video

Here I have a method that adds the video layer to the UIView that I have setup in IB:

-(void)loadPlayer{
self.asset = [AVAsset assetWithURL:url];

AVPlayerItem *item = [AVPlayerItem playerItemWithAsset:self.asset];

self.player = [AVPlayer playerWithPlayerItem:item];
self.playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];
self.playerLayer.contentsGravity = AVLayerVideoGravityResizeAspect;
self.player.actionAtItemEnd = AVPlayerActionAtItemEndNone;

item.videoComposition = [AVVideoComposition videoCompositionWithPropertiesOfAsset:self.asset];

[self.player pause];
[self.player addObserver:self forKeyPath:@"status" options:0 context:nil];

dispatch_async(dispatch_get_main_queue(), ^{
[self.videoLayer.layer addSublayer:self.playerLayer];
});
}


The above method gets called in the viewDidAppear of the View Controller, so each time the current View Controller loads, the video should start to play.

Here I check for the player status and play the asset if ready:

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
change:(NSDictionary *)change context:(void *)context {
if (object == self.player && [keyPath isEqualToString:@"status"]) {
if (self.player.status == AVPlayerStatusReadyToPlay) {
[self.player play];
}
}
}


The problem is that the view did appear, the video starts playing, but only the audio, not video. All I get is black screen in the place of video. Audio is playing back fine, but it does not seem to render the video frames for some reason unknown.

This happens only on iOS 10 devices, the same code when run on a iOS 9 devices, works like a charm. The video shows up as expected.

Is there anything that is changed in the AVFoundation framework for iOS 10 in terms of AVPlayer or so? Or is there anything that I am missing here, coz iOS 9 plays it good.

If anyone has faced this issue, and if you have solved it, please post your solution. It would be helpful.

Thanks.

Answer

Thanks for your replies! I just found that, for some reason in iOS 10 the viewDidLayoutSubviews did get called as it was in iOS 9. Actually I was setting the player layer's frame in the viewdidlayoutsubviews method. Since it didn't get called, I was not able to see the player on screen. What I did was, set the player layer's frame in the loadPlayer method above.And it works fine. Thanks! Hope this helps someone.