iphone - AVPlayer 不播放视频文件

Question

嗨，我正在使用 AVPlayer 逐帧缓慢播放视频。我为此使用了这个编码。我无法播放视频。请注意我的问题。

UIView *newView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 440)];
newView.backgroundColor = [UIColor yellowColor];

NSString *videoName = [fileNameArray objectAtIndex:indexPath.section];
NSString *url = [Utilities documentsPath:[NSString stringWithFormat:@"OSC/%@/%@.mov",videoName,videoName]];

AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:url]];
//AVPlayer *avPlayer = [[AVPlayer playerWithURL:[NSURL URLWithString:url]] retain];
AVPlayer *avPlayer = [[AVPlayer playerWithPlayerItem:playerItem] retain];
AVPlayerLayer *avPlayerLayer = [[AVPlayerLayer playerLayerWithPlayer:avPlayer] retain];

avPlayerLayer.frame = self.view.frame;
[newView.layer addSublayer:avPlayerLayer];
[self.view addSubview:newView];
[avPlayer play];

avPlayer.actionAtItemEnd = AVPlayerActionAtItemEndNone; 

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(playerItemDidReachEnd:)
                                             name:AVPlayerItemDidPlayToEndTimeNotification
                                           object:[avPlayer currentItem]];

Answer 1

因为您使用本地文件，所以最好使用 [NSURL fileURLWithPath:url] 将 NSString 转换为 NSURL。所以把代码改成:

AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:[NSURL fileURLWithPath:url]];