制作VLCMediaPlayer (MobileVLCKit)的快照

Question

我正在制作一个应用程序，显示流视频(由rtmp)。我已经开始用MobileVLCKit了。我需要一个功能，将使视频快照。我已经尝试了内置函数

    func saveVideoSnapshotAt(path: String!, withWidth: UInt32, andHeight: UInt32)

但是它不起作用。这是支持在videolan论坛上写的:

"此方法仅适用于OS X。虽然它在iOS上是暴露的(这是它应该做的)不是，我同意)，它不会在移动设备上工作。"

然后我尝试使用标准的iOS功能:

    @IBOutlet weak var videoView: UIView!
    var mediaPlayer = VLCMediaPlayer()
    if let url = NSURL(string: "rtmp://someurl") {
        let media = VLCMedia(URL: url)
        mediaPlayer.media = media
        mediaPlayer.drawable = videoView
        mediaPlayer.play()
    }
    UIGraphicsBeginImageContext(videoView.frame.size);
    guard let context = UIGraphicsGetCurrentContext() else {
        print("Couldn't get context")
        return
    }
    videoView.layer.renderInContext(context)
    guard let screenshot = UIGraphicsGetImageFromCurrentImageContext() else {
        UIGraphicsEndImageContext()
        return
    }
    UIGraphicsEndImageContext()

结果我只得到UIView背景截图，而不是视频。有没有人知道是否有任何解决方案，或者至少我应该继续寻找哪个方向?

Answer 1

解决方案比我想象的要简单。

    let size = mediaPlayer.drawable.frame.size
    UIGraphicsBeginImageContextWithOptions(size, false, UIScreen.mainScreen().scale)
    let rec = mediaPlayer.drawable.frame
    mediaPlayer.drawable.drawViewHierarchyInRect(rec, afterScreenUpdates: false)
    let image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

Answer 2

您是否像这样在代码中为mediaPlayer添加了委托https://github.com/maknapp/vlckitSwiftSample/blob/master/vlckitSwiftSample/ViewController.swift