AVPlayer 没有播放本地保存的视频文件

Posted 2023-02-23

【中文标题】AVPlayer 没有播放本地保存的视频文件

【英文标题】：AVPlayer is not playing a locally saved video file

【发布时间】：2020-12-19 09:42:27

【问题描述】：

我有这段代码试图播放以前保存的文件（存在），但我在播放视频时看到黑屏。

static func playVideo(from filename: String, vc: UIViewController, view: UIView) -> Bool 
    let filepath = videosDirectoryPath + filename
    if (MediaUtils.fileExists(filePath: filepath)) 
        Logging.logError("Playing video failed, file not found: \(filepath)")
        return false
    

    let player = AVPlayer(url: URL(fileURLWithPath: filepath))
    let playerViewController = AVPlayerViewController()
    playerViewController.player = player
    playerViewController.view.frame = view.frame
    view.addSubview(playerViewController.view)
    vc.present(playerViewController, animated: true) 
        player.play()
    
    return true

我确实看到了一个错误Unbalanced calls to begin/end appearance transitions for <AVPlayerViewController: 0x109010e00>.，但不确定这是否与这里有关。我可以用这个很好地播放一个 URL：

static func playVideo(videoUrl: String, vc: UIViewController, view: UIView) 
    Logging.logDebug("Playing video \(videoUrl)")
    let player = AVPlayer(url: URL(string: videoUrl)!)
    let playerViewController = AVPlayerViewController()
    playerViewController.player = player
    playerViewController.view.frame = view.frame
    view.addSubview(playerViewController.view)
    vc.present(playerViewController, animated: true) 
        player.play()
    

知道为什么无法播放本地保存的文件。希望player.play()有错误。

【参考方案1】：

你可以试一试?

func playVideo(videoUrl: String, vc: UIViewController, view: UIView) 
    let player = AVPlayer(url: NSURL(fileURLWithPath: videoUrl) as URL)
    let playerLayer = AVPlayerLayer(player: player)
    playerLayer.videoGravity = .resizeAspect
    playerLayer.frame = logoImageView.frame
    view.layer.addSublayer(playerLayer)
    vc.present(playerViewController, animated: true) 
        player?.play()