Iphone 如何从avfoundation摄像头获取视频输出

在这里，我尝试录制视频并处理输出缓冲区，我使用avfoundation摄像头录制视频并以示例缓冲区委托方法收集输出，并在图像视图中显示该输出。每件事情都可以找到，但如何从这里保存视频，任何人都可以帮助我

- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection;{
  UIImage *image = [self imageFromSampleBuffer:sampleBuffer];
  UIImage *fImage = [self addText:image text:@"u r text here"];//image will be processed   here
   self.dispFrames.image = fImage;

   }

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您必须使用音频/视频输入设置AVAssetWriter，并附加示例缓冲区。您可以签出此示例代码RosyWriterVideoProcessor类

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我用Swift 5 AVFoundation编写了一个示例项目。一个控制器中的照片和摄像机。前后摄像头之间带有切换开关。 核对一下

来自项目的视频输出代码：

func fileOutput(_ output: AVCaptureFileOutput, didFinishRecordingTo outputFileURL: URL, from connections: [AVCaptureConnection], error: Error?) {
    let showMediaController = ShowMediaController()
    showMediaController.url = outputFileURL
    navigationController?.pushViewController(showMediaController, animated: true)
}

在ShowMediaConroller中，我获取新视频的url并可以播放它：

@objc private func handlePlay() {
    if let url = url {
        player = AVPlayer(url: url)
        playerLayer = AVPlayerLayer(player: player)
        playerLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
        playerLayer?.frame = view.frame
        view.layer.insertSublayer(playerLayer!, at: 2)
        player?.play()
        playButton.isHidden = true
    }
}