播放视频向后

Question

我想要什么，基本上扭转了AVAsset和输出的视频文件，我发现这个链接 - https://github.com/tempire/ReverseAVAsset/blob/master/AVAsset.swift

这是我做过什么：

import UIKit 
import AVFoundation 
import AVKit 

class ViewController: UIViewController { 

    var playerViewController = AVPlayerViewController() 
    var playerView = AVPlayer() 


    override func viewDidAppear(_ animated: Bool) { 
     super.viewDidAppear(animated) 

     let path = Bundle.main.path(forResource: "video", ofType: "mov") 
     let outputUrl = URL(fileURLWithPath: "\(NSUUID().uuidString)video.mov") 

     let originalAsset = AVAsset(url: URL(fileURLWithPath: path!)) 
     let reversedAsset = originalAsset.reversedAsset(outputUrl) 



     playerView = AVPlayer(playerItem: AVPlayerItem(asset: reversedAsset!)) 
     playerViewController.player = playerView 

     present(playerViewController, animated: true) { 
      self.playerViewController.player?.play() 
     } 

    } 


} 

但其没有工作，这是我结束了：

我觉得我做的事情错outputURL，请帮助，如果你知道该怎么做

Answer 1

问题是与输出URL，这是做

import UIKit 
import AVFoundation 
import AVKit 

class ViewController: UIViewController { 

    var playerViewController = AVPlayerViewController() 
    var playerView = AVPlayer() 


    override func viewDidAppear(_ animated: Bool) { 
     super.viewDidAppear(animated) 

     let path = Bundle.main.path(forResource: "video", ofType: "mov") 

     //Correct way 
     var outputURL: URL? 
     do { 
      let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first! 
      outputURL = documentsURL.appendingPathComponent("\(NSUUID().uuidString)newvideo.mp4") 

     } 

     let originalAsset = AVAsset(url: URL(fileURLWithPath: path!)) 
     let reversedAsset = originalAsset.reversedAsset(outputUrl) 



     playerView = AVPlayer(playerItem: AVPlayerItem(asset: reversedAsset!)) 
     playerViewController.player = playerView 

     present(playerViewController, animated: true) { 
      self.playerViewController.player?.play() 
     } 

    } 


}