尝试使用m3u8中的AVAssetDownloadURLSession下载iOS视频时出错

Question

尝试使用.m3u8下载一个AVAssetDownloadURLSession视频文件(http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8)。当我在Xcode中运行代码时，会得到一个错误：

“错误Domain=AVFoundationErrorDomain代码=-11800\”操作无法完成\“UserInfo={NSLocalizedFailureReason=An未知错误发生(-12780)，NSLocalizedDescription=The操作无法完成}”

。我使用的代码：

import UIKit
import AVFoundation

class ViewController: UIViewController, AVAssetDownloadDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.setupAssetDownload()
        // Do any additional setup after loading the view, typically from a nib.
    }


    func setupAssetDownload() {
        // Create new background session configuration.
        let configuration = URLSessionConfiguration.background(withIdentifier: "AssetID")

        // Create a new AVAssetDownloadURLSession with background configuration, delegate, and queue
        let downloadSession = AVAssetDownloadURLSession(configuration: configuration,
                                                        assetDownloadDelegate: self,
                                                        delegateQueue: OperationQueue.main)

        let url = URL(string: "http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8")
        // let url = URL(string: "https://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/sl.m3u8")
        let asset = AVURLAsset(url: url!)

        // Create new AVAssetDownloadTask for the desired asset
        let downloadTask = downloadSession.makeAssetDownloadTask(asset: asset,
                                                                 assetTitle: "AssetTitle",
                                                                 assetArtworkData: nil,
                                                                 options: nil)
        // Start task and begin download
        downloadTask?.resume()
    }

    //MARK: Delegates
    public func urlSession(_ session: URLSession, assetDownloadTask: AVAssetDownloadTask, didFinishDownloadingTo location: URL){
        print("DownloadedLocation:\(location.absoluteString)")
    }

    public func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
        print("Error")
    }

    public func urlSession(_ session: URLSession, didBecomeInvalidWithError error: Error?) {
        print("Error")
    }

    public func urlSession(_ session: URLSession, taskIsWaitingForConnectivity task: URLSessionTask) {
        print("Waiting")
    }

    public func urlSession(_ session: URLSession, task: URLSessionTask, didFinishCollecting metrics: URLSessionTaskMetrics) {
        print("Finihs collecting metrics:")
    }
}

链接到Github：https://github.com/dep2k/m3u8download.git

Answer 1

我检查了您的代码，发现您没有在. NSAllowsArbitraryLoads plist文件中添加NSAppTransportSecurity字典中的YES中的键。

试着分享结果。

Answer 2

模拟器不支持下载HLS流。

你应该使用真正的设备。