AVPlayer 在长时间延迟后开始重现视频

Question

延迟大约10秒。我的代码片段。它是 HomeController 的 *.m 文件：

@interface HomeController ()
@property(nonatomic, strong) AVPlayerViewController *playerViewController;
@implementation HomeController
- (void)viewDidLoad
{
    [super viewDidLoad];
    ...
    self.playerViewController = [[AVPlayerViewController alloc] init];
}
- (IBAction)watchDemoToggle:(id)sender {
    NSURL *url = [NSURL URLWithString:@"http://blahblahblah.com/demo.mp4"];
        AVURLAsset *asset = [AVURLAsset assetWithURL: url];
        AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:asset];
    if(playerItem)
    {
        AVPlayer *player = [[AVPlayer alloc] initWithPlayerItem:playerItem];
        self.playerViewController.player = player;
        [self.playerViewController.player addObserver:self forKeyPath:@"status" options:0 context:nil];
        [self.playerViewController setShowsPlaybackControls:NO];
        [self presentViewController:self.playerViewController animated:YES completion:^{
            [self.playerViewController.player play];
            self.playerViewController.showsPlaybackControls = YES;
        }];
    }
}

#pragma mark - KVO
- (void)observeValueForKeyPath:(NSString *)keyPath
                      ofObject:(id)object
                        change:(NSDictionary *)change
                       context:(void *)context {
        if ([keyPath isEqualToString:@"status"]) {
            AVPlayerStatus status = [change[NSKeyValueChangeNewKey] integerValue];
            NSLog(@"status = %ld", (long)status);
        }
}

我添加了KVO，点击播放后播放器状态为AVPlayerStatusUnknown。之后，尽管视频正在重现，但它并没有改变。有人知道吗？

Answer 1

将 AVPlayer 的 automaticallyWaitsToMinimizeStalling 属性设置为 false 以便立即开始播放。

AVPlayer *player = [[AVPlayer alloc] initWithPlayerItem:playerItem];
player.automaticallyWaitsToMinimizeStalling = false;

但是如果没有足够的内容可供播放，那么播放器可能会停止。

有关详细信息，请参阅此 Apple 文档。

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