AVPlayer视频空白但听到声音 [英] AVPlayer Video Blank but Hear Sound

问题描述

我正在从 MPMoviePlayerController 切换到 AVPlayer ，因为我需要对视频交换进行更精细的控制。我正在玩 MPMoviePlayerController 的 .mov 文件播放正常，但切换到 AVPlayer 我听到视频中的音频，但视频只显示我添加 AVPlayerLayer 的视图背景。这是我如何初始化 AVPlayer 。

I'm switching from MPMoviePlayerController to AVPlayer as I need finer grained control over video swapping. The .mov file I was playing with MPMoviePlayerController played fine, but after switching to AVPlayer I hear the audio from the video, but the video just shows the view background that I added the AVPlayerLayer to. Here's how I'm initializing the AVPlayer.

self.player = [[AVPlayer alloc] initWithURL:video];

AVPlayerLayer* playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];
playerLayer.frame = self.playerContainer.bounds;
[self.playerContainer.layer addSublayer:playerLayer];

然后我发出一个。

[self.player play];

视频播放时我听到了音频，但看不到视频。我也尝试将zPosition设置为没有运气。

When the video plays I hear the audio, but see no video. I also tried setting the zPosition to no luck.

playerLayer.zPosition = 1;

推荐答案

发现它是使用<$ c的结果$ C>自动版式。在 viewDidLoad 中， self.playerContainer.bounds 是 CGRectZero 。

Found out it was a result of using AutoLayout. In the viewDidLoad the self.playerContainer.bounds is a CGRectZero.

我必须在 viewDidAppear 中指定playerLayer帧以匹配playerContainer。

I had to assign the playerLayer frame in the viewDidAppear to match the playerContainer.

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