如何从防水相机获取视频输出

Question

[这里，我正在尝试记录视频并处理输出缓冲区，我正在使用avfoundation摄像机来记录视频，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。每件事都可以找到，但是如何从中保存视频这里可以有人请帮助我。

- (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;

   }

Answer 1

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https://developer.apple.com/library/ios/samplecode/RosyWriter/Listings/Classes_RosyWriterVideoProcessor_m.html#//apple_ref/doc/uid/DTS40011110-Classes_RosyWriterVideoProcessor_m-DontLinkElementID_8

Answer 2

我用Swift 5 AVFoundation编写了示例项目。一个控制器中的照片和摄像机。在前后摄像头之间具有切换器。通过this link进行检查>

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：

@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
    }
}