ios - AVPlayer 太长并且延迟到 readyToPlay 和快速播放服务器音乐

Question

我尝试用 swift 语言缓冲并立即播放 remote url 音频。

但问题是readyToPlay案例和播放时间过长。

例如，一个声音 url 大约需要 12 到 15 秒才能运行。

这是我的代码:

var asset: AVAsset!
var player: AVPlayer!
var playerItem: AVPlayerItem!

private var playerItemContext = 0

let requiredAssetKeys = [ "playable","hasProtectedContent"]

---

let url = URL(string: "http://sound_link.mp3")!
asset = AVAsset(url: url)

playerItem = AVPlayerItem(asset: asset,
                              automaticallyLoadedAssetKeys: requiredAssetKeys)
playerItem.addObserver(self,
                       forKeyPath: #keyPath(AVPlayerItem.status),
                       options: [.old, .new],
                       context: &playerItemContext)

player = AVPlayer(playerItem: playerItem)

根据这个(ExploringAVFoundation) documentation've done that

我使用 observeValue func 来处理玩家准备好玩的游戏:

override func observeValue(forKeyPath keyPath: String?,of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {

   guard context == &playerItemContext else {
        super.observeValue(forKeyPath: keyPath, of: object, change: change, context: context)
        return
    }

    if keyPath == #keyPath(AVPlayerItem.status) {
        let status: AVPlayerItemStatus
        if let statusNumber = change?[.newKey] as? NSNumber {
            status = AVPlayerItemStatus(rawValue: statusNumber.intValue)!
        } else {
            status = .unknown
        }
        // Switch over status value
        switch status {
        case .readyToPlay:
            print("readyToPlay \(status.rawValue)")
            player.play() // here play remote sound
        case .failed:
            print("readyToPlay \(status.rawValue)")
        case .unknown:
            print("failed \(status.rawValue)")
        }

    }
}

这是返回的日志:

2017-02-08 13:44:00.626036 [15144:3747850] [aqme] 255: AQDefaultDevice (1): skipping input stream 0 0 0x0
readyToPlay 1
2017-02-08 13:44:02.631182 [15144:3747850] [aqme] 255: AQDefaultDevice (173): skipping input stream 0 0 0x0

在上面的日志中，用 4 秒出现 readyToPlay 1 然后用 10 秒播放声音

服务器速度很好，我尝试在 Android 中播放服务器声音，缓冲和播放声音的最长时间约为 3 秒(在 Android 应用程序中)，但在IOS 完全缓冲和播放声音，总共需要大约 15 秒!

感谢您的关注

Answer 1

尝试使用这个:

player.automaticallyWaitsToMinimizeStalling = false