AVPlayer HLS直播IOS

Question

我正在嘗試使用HLS直播但我收到錯誤：

錯誤：可選（“操作無法完成”），錯誤：可選（錯誤域= AVFoundationErrorDomain代碼= -11800“媒體格式 - 樣本描述無效（例如無效大小）”UserInfo = {NSUnderlyingError = 0x60000005b510 {錯誤域= NSOSStatusErrorDomain代碼= -12714“（null）”}，NSLocalizedFailureReason =發生未知錯誤（-12714），NSDebugDescription =媒體格式 - 樣本描述無效（例如無效大小），NSLocalizedDescription =操作無法完成}）2018- 04-25 12：14：51.608117 + 0200 morethen2 [11681：374192]任務。<3>完成錯誤 - 代碼：-999

我不能分享鏈接到流，它的私人。

這是代碼：

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)")
} }

這是視頻細節：

同樣的流也適用於Android應用和網絡

Answer 1

我留下我的答案，以防其他人需要它。 經過研究，嘗試和錯誤我終於找到了讓AVPlayer與NGINX rtmp hls一起工作的方法。

發生這種情況的主要原因是服務器上視頻片段的元數據錯誤。 我們必須找到解決這個問題的方法。

這是我對macbook上游視頻的命令，這是典型的：

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

在服務器端，我在Ubuntu 18.10上配置了一個基本的Nginx RTMP HLS，可以通過googling找到它。 請注意，我使用fdk_aac重新編譯最新的ffmpeg。

RTMP有2個應用程序：一個用於接收上游，另一個用於轉碼HLS，這也是典型的。

為了解決元數據問題，我通過添加： -profile:v baseline -level 3.0調整ffmpeg transcode命令和基線配置文件。 由於顏色格式錯誤，這將導致錯誤，因此我還添加了： -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

我的AVPlayer代碼在swift中：

    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()