播放視頻向後

Question

我想要什麼，基本上扭轉了AVAsset和輸出的視頻文件，我發現這個鏈接 - https://github.com/tempire/ReverseAVAsset/blob/master/AVAsset.swift

這是我做過什麼：

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() 
     } 

    } 


} 

但其沒有工作，這是我結束了：

我覺得我做的事情錯outputURL，請幫助，如果你知道該怎麼做

Answer 1

問題是與輸出URL，這是做

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() 
     } 

    } 


}