ios - AVPlayer HLS实时流IOS

我正在尝试使用HLS直播视频，但出现错误:

错误:可选(“操作无法完成”)，错误:
可选(错误域= AVFoundationErrorDomain代码= -11800“媒体
格式-样本说明无效(例如大小无效)”
UserInfo = {NSUnderlyingError = 0x60000005b510 {Error
Domain = NSOSStatusErrorDomain Code = -12714“(null)”}，
NSLocalizedFailureReason =发生未知错误(-12714)，
NSDebugDescription =媒体格式-样本说明无效(例如
大小无效)，NSLocalizedDescription =无法执行该操作
已完成})2018-04-25 12:14:51.608117 + 0200 morethen2 [11681:374192]
任务。完成并出现错误-
码:-999

我无法分享链接以进行私密直播。

这是代码:

class ViewController: UIViewController {

var player = AVPlayer()

override func viewDidLoad() {
    super.viewDidLoad()
    let url = URL(string: "https:can-t-share-it/LIVE-008900021A-LIP-0-channelNo2_360p/manifest.m3u8")!

    let asset = AVURLAsset(url: url)

    let playerItem = AVPlayerItem(asset: asset)

    player = AVPlayer(url: url)
    let layer = AVPlayerLayer(player: player)
    layer.frame = view.layer.frame
    view.layer.addSublayer(layer)


    self.player.addObserver(self, forKeyPath: #keyPath(AVPlayer.status), options: [.new, .initial], context: nil)
    self.player.addObserver(self, forKeyPath: #keyPath(AVPlayer.currentItem.status), options:[.new, .initial], context: nil)

    // Watch notifications
    let center = NotificationCenter.default
    center.addObserver(self, selector:"newErrorLogEntry:", name: .AVPlayerItemNewErrorLogEntry, object: player.currentItem)
    center.addObserver(self, selector:"failedToPlayToEndTime:", name: .AVPlayerItemFailedToPlayToEndTime, object: player.currentItem)


    player.play()

    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func dismiss(_ sender: Any) {
    UIApplication.shared.keyWindow?.rootViewController?.dismiss(animated: true, completion: nil)
}


// Observe If AVPlayerItem.status Changed to Fail
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey: Any]?, context: UnsafeMutableRawPointer?) {
    if let player = object as? AVPlayer, keyPath == #keyPath(AVPlayer.currentItem.status) {
        let newStatus: AVPlayerItemStatus
        if let newStatusAsNumber = change?[NSKeyValueChangeKey.newKey] as? NSNumber {
            newStatus = AVPlayerItemStatus(rawValue: newStatusAsNumber.intValue)!
        } else {
            newStatus = .unknown
        }
        if newStatus == .failed {
            NSLog("Error: \(String(describing: player.currentItem?.error?.localizedDescription)), error: \(String(describing: player.currentItem?.error))")
        }
    }
}

// Getting error from Notification payload
func newErrorLogEntry(_ notification: Notification) {
    guard let object = notification.object, let playerItem = object as? AVPlayerItem else {
        return
    }
    guard let errorLog: AVPlayerItemErrorLog = playerItem.errorLog() else {
        return
    }
    NSLog("Error: \(errorLog)")
}

func failedToPlayToEndTime(_ notification: Notification) {
    let error = notification.userInfo!["AVPlayerItemFailedToPlayToEndTimeErrorKey"]
    NSLog("error: \(error)")
} }

以下是视频详情:


同样的流也可以在Android应用和网络上使用

最佳答案

我将答案留在这里，以防万一其他人需要它。经过研究，尝试和错误，我终于找到了使NVP rtmp hls与AVPlayer一起工作的方法。

发生这种情况的主要原因是服务器上视频片段的元数据错误。我们必须找到一种解决方法。

这是我从我的Macbook到上游视频的命令，通常是:

ffmpeg -f avfoundation -framerate 30  -i "0:0" -f flv -s 360x240 -vcodec libx264 -c:a aac -async 1 -vsync 1 -preset slower rtmp://127.0.0.1/live/xyz

在服务器端，我在Ubuntu 18.10上配置了一个基本的Nginx RTMP HLS，可以通过谷歌搜索找到它。请注意，我使用fdk_aac重新编译了最新的ffmpeg。

RTMP有2个应用程序:一个用于接收上游，另一个用于对HLS进行转码(这也是典型的)。

为了解决元数据问题，我通过添加-profile:v baseline -level 3.0来对ffmpeg transcode命令进行了基线配置调整。由于错误的颜色格式，这将导致错误，因此我还添加了:-vf "scale=480:trunc(ow/a/2)*2,format=yuv420p"。

最后，我的nginx配置有效:
https://gist.github.com/chung-nguyen/d88e73e3cc8788878f5ffb8c232b4729

以及我的AVPlayer代码:

    let videoURL = URL(string: "http://blogchange.live/hls/xyz_low/index.m3u8")

    let playerItem = AVPlayerItem(url: videoURL!)
    let adID = AVMetadataItem.identifier(forKey: "X-TITLE", keySpace: .hlsDateRange)
    let metadataCollector = AVPlayerItemMetadataCollector(identifiers: [adID!.rawValue], classifyingLabels: nil)
    metadataCollector.setDelegate(self, queue: DispatchQueue.main)
    playerItem.add(metadataCollector)


    let player = AVPlayer(playerItem: playerItem)
    let playerLayer = AVPlayerLayer(player: player)
    playerLayer.frame = self.view.bounds
    self.view.layer.addSublayer(playerLayer)
    self.player = player
    player.play()

关于ios - AVPlayer HLS实时流IOS，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/50020778/