AVPlayerItemStatusFailed原因

错误日志：

ErrorDomain=AVFoundationErrorDomainCode=-11800

代码：

playerItem=[AVPlayerItemplayerItemWithURL:[NSURL fileURLWithPath:filePath.path]];

if(!self.avPlayer){

avPlayer=[AVPlayer playerWithPlayerItem:playerItem];

}

[avPlayer.currentItem addObserver:selfforKeyPath:@"status"options:0context:nil];

if(self.avPlayer.currentItem!=self.playerItem){

[self.avPlayer replaceCurrentItemWithPlayerItem:playerItem];

}

AVPlayerLayer *avPlayerLayer=[AVPlayerLayer playerLayerWithPlayer:avPlayer];

avPlayerLayer.frame=self.bounds;

[self.layer addSublayer:avPlayerLayer];

出现失败的原因：

1、可能是地址错误（重写输出文件的路径NSURL）

2、addSublayer:avPlayerLayer,添加了多个层。（判断唯一性）