Unable to play downloaded HLS content while internet is not available - swift

Question

I am working on Downloading and playing HLS content, To download the HLS I am using following code
func downloadTask() {
let videoUrl = URL(string: "https://bitdash-a.akamaihd.net/content/MI201109210084_1/m3u8s/f08e80da-bf1d-4e3d-8899-f0f6155f6efa.m3u8")!
configuration = URLSessionConfiguration.background(withIdentifier: downloadIdentifier)
downloadSession = AVAssetDownloadURLSession(configuration: configuration!, assetDownloadDelegate: self, delegateQueue: OperationQueue.main)
let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
destinationUrl = documentsDirectoryURL.appendingPathComponent(videoUrl.lastPathComponent)
var urlComponents = URLComponents(
url: videoUrl,
resolvingAgainstBaseURL: false
)!
urlComponents.scheme = "https"
do {
let asset = try AVURLAsset(url: urlComponents.url!)
asset.resourceLoader.setDelegate(self, queue: DispatchQueue(label: "com.example.AssetResourceLoaderDelegateQueue"))
if #available(iOS 10.0, *) {
assetDownloadTask = downloadSession!
.makeAssetDownloadTask(
asset: asset,
assetTitle: "RG-TVVideo",
assetArtworkData: nil,
options: nil
)
APP_DELEGATE.isProgressRunning = true
assetDownloadTask?.resume()
} else {
// Fallback on earlier versions
}
} catch { print("Erorr while parsing the URL.") }
}
Download finished
func urlSession(_ session: URLSession, assetDownloadTask: AVAssetDownloadTask, didFinishDownloadingTo location: URL) {
if #available(iOS 11.0, *) {
let storageManager = AVAssetDownloadStorageManager.shared()
let newPolicy = AVMutableAssetDownloadStorageManagementPolicy()
newPolicy.expirationDate = Date()
newPolicy.priority = .important
let baseURL = URL(fileURLWithPath: NSHomeDirectory())
let assetURL = baseURL.appendingPathComponent(location.relativePath)
storageManager.setStorageManagementPolicy(newPolicy, for: assetURL)
UserDefaults.standard.set(location.relativePath, forKey: "videoPath")
strDownloadStatus = "5"
let dictVideoInfo = ["strDownloadStatus" : "5","VideoID":self.strID]
// Here I am Storing Downloaded location in to database
DBManager.shared.updateVideoStatus(strVideoID: APP_DELEGATE.arrTempVideoIds.object(at: 0) as! String, strStatus: "5", strSavePath: location.relativePath) { (status) in }
DispatchQueue.main.async {
NotificationCenter.default.post(name: NSNotification.Name.init("UpdateProgress"), object: self.percentageComplete, userInfo: dictVideoInfo)
}
}
}
Now I am trying to get Video path from the location which is stored in Database and trying to play it offline(Without Internet) using following code
func setLocalPlayer(strDownloadPath: String) {
let strDownloadPath = “”
//Getting path from database
DBManager.shared.getDownloadedPath(videoID: VideoID) { (strPath) in
strDownloadPath = strPath
}
activityIndicator.isHidden = false
let baseURL = URL(fileURLWithPath: NSHomeDirectory())
let assetURL = baseURL.appendingPathComponent(strDownloadPath)
let asset = AVURLAsset(url: assetURL)
// if let cache = asset.assetCache, cache.isPlayableOffline {
// let videoAsset = AVURLAsset(url: assetURL)
asset.resourceLoader.preloadsEligibleContentKeys = true
asset.resourceLoader.setDelegate(self, queue: DispatchQueue(label: "com.example.AssetResourceLoaderDelegateQueue"))
let playerItem = AVPlayerItem(asset: asset)
avPlayer = AVPlayer(playerItem: playerItem)
avPlayerLayer = AVPlayerLayer()
avPlayerLayer.frame = CGRect(x: 0, y: 0, width: playerContainer.frame.width, height: playerContainer.frame.height)
avPlayerLayer.videoGravity = .resize
avPlayerLayer.player = avPlayer
playerContainer.layer.addSublayer(avPlayerLayer)
let interval = CMTime(seconds: 0.01, preferredTimescale: CMTimeScale(NSEC_PER_SEC))
timeObserver = avPlayer?.addPeriodicTimeObserver(forInterval: interval, queue: DispatchQueue.main, using: { elapsedTime in
self.updateVideoPlayerState()
if self.avPlayer != nil {
self.bufferState()
}
})
self.slider.setThumbImage(UIImage(named: "slider_dot"), for: UIControl.State.normal)
resetTimer()
avPlayer.play()
isPlaying = true
// }
}
NOTE: This code is working fine when internet is on
I have referred following links
https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/MediaPlaybackGuide/Contents/Resources/en.lproj/HTTPLiveStreaming/HTTPLiveStreaming.html
https://assist-software.net/snippets/how-play-encrypted-http-live-streams-offline-avfoundation-ios-using-swift-4
Downloading and playing offline HLS Content - iOS 10
Please guide what I am doing wrong.
Thanks

Answer 1

Well, I don't know if it's your error, but for further readings :
Don't do newPolicy.expirationDate = Date() it's a mistake. According to Advances in HTTP Live Streaming 2017 WWDC session, it will delete your file as soon as possible.
Before playing your offline playback, you can check if it's still on your device in Settings -> General -> Storage -> MyApp
The expiration date property is there in case your asset at some point
becomes no longer eligible to be played. For instance, you may find
that you may be in a situation where a particular show may be leaving
your catalog, you no longer have rights to stream it.
If that's the case you can set the expiration date and it will be sort of bumped up
in the deletion queue. So, using it is fairly straight forward.