How to check if AVPlayer has Video or just Audio?

I try to play some "media" but at the time the AVPlayer starts I don't know if it is audio or Video.

I connected the player Layer and it works fine.

self.avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:[[PCPlayerManager sharedManager] audioPlayer]];
avPlayerLayer.videoGravity = AVLayerVideoGravityResizeAspect;
avPlayerLayer.frame = CGRectMake(0, 0, videoView.frame.size.width, videoView.frame.size.height);
[videoView.layer addSublayer:avPlayerLayer];

But how can I check if there is Video so I can add/remove some Options?