AVPlayer 缓冲后停止播放视频

Question

当我从互联网加载视频（10-40MB 大）时，我无法提供流畅的播放体验。

我的 AVPlayer 要么加载整个视频然后播放它，要么播放 1 秒、缓冲然后停止播放。

我尝试了无穷无尽的库、缓冲区观察器方法和教程。似乎没有任何帮助。

    .
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    self.makeLoaderVisible()

    let playerItem = AVPlayerItem(url: url)
    playerItem.addObserver(self, forKeyPath: "playbackBufferEmpty", options: .new, context: nil)
    playerItem.addObserver(self, forKeyPath: "playbackLikelyToKeepUp", options: .new, context: nil)
    playerItem.addObserver(self, forKeyPath: "playbackBufferFull", options: .new, context: nil)

    avPlayer?.replaceCurrentItem(with: playerItem)
    avPlayer?.automaticallyWaitsToMinimizeStalling = false
    avPlayer?.playImmediately(atRate: 0)
//  avPlayer?.play()

    }


override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
    if object is AVPlayerItem {
        switch keyPath! {
        case "playbackBufferEmpty":
            // Show loader
            makeLoaderVisible()

        case "playbackLikelyToKeepUp":
            // Hide loader
            hideLoader()

        case "playbackBufferFull":
            // Hide loader
            hideLoader()

        default:
            return
        }
    }
}

Answer 1

从 iOS 10.x 开始，您可以进行一些缓冲设置，例如您可以决定缓冲视频需要多少秒：

    if #available(iOS 10.0, tvOS 10.0, OSX 10.12, *) {
        avPlayer?.automaticallyWaitsToMinimizeStalling = .playWhenBufferNotEmpty
        //preferredForwardBufferDuration -> default is 0, which means `AVPlayer` handle it independently, try more seconds like 5 or 10.
        playerItem.preferredForwardBufferDuration = TimeInterval(5) 
    }