如何在iOS（CUSTOM）中捕捉視頻？

Question

我用這來捕捉圖像

var captureDevice : AVCaptureDevice? 
var picker = UIImagePickerController() 
var captureSession = AVCaptureSession() 
var stillImageOutput = AVCaptureStillImageOutput() 
var captureVideoPreviewLayer = AVCaptureVideoPreviewLayer() 

func captureImage (sender:AnyObject?) { 

    isCapturingImage = true 
    var videoConnection :AVCaptureConnection? = nil 
    for connection:AVCaptureConnection in stillImageOutput.connections as! [AVCaptureConnection] { 

     for port:AVCaptureInputPort in connection.inputPorts as! [AVCaptureInputPort]{ 

      if(port.mediaType == AVMediaTypeVideo){ 

       videoConnection = connection 
       break; 

      } 


     } 

     if((videoConnection) != nil) {break} 

    } 

    stillImageOutput.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: { 
     (imageSampleBuffer:CMSampleBufferRef! , error :NSError!) in 

     if (imageSampleBuffer != nil) { 


      var imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(imageSampleBuffer) 
      let capturedImage = UIImage.init(data: imageData, scale:1) 

     } 
    }) 


} 

我怎樣才能實現捕獲視頻？我幾乎找不到有關自定義視頻捕獲的任何教程。任何人都可以實現捕捉視頻的功能？

Answer 1

使用下面的代碼使用AVFoundation

class ViewController: UIViewController,AVCaptureFileOutputRecordingDelegate { 

    @IBOutlet weak var cameraView: UIView! 

    var captureSession : AVCaptureSession! 
    var movieFileOutput : AVCaptureMovieFileOutput! 

    override func viewDidAppear(animated: Bool) { 
     super.viewDidAppear(animated) 
     beginSession() 

    } 

    func beginSession() { 
     captureSession = AVCaptureSession() 

     do { 

      captureSession.beginConfiguration() 

      let cameraDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo) as AVCaptureDevice 
      let cameraDeviceInput = try AVCaptureDeviceInput(device: cameraDevice) 
      if (captureSession.canAddInput(cameraDeviceInput) == true) { 
       captureSession.addInput(cameraDeviceInput) 
      } 

      let audioDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeAudio) as AVCaptureDevice 
      let audioDeviceInput = try AVCaptureDeviceInput(device: audioDevice) 
      if (captureSession.canAddInput(audioDeviceInput) == true) { 
       captureSession.addInput(audioDeviceInput) 
      } 

      movieFileOutput = AVCaptureMovieFileOutput() 
      if (captureSession.canAddOutput(movieFileOutput) == true) { 
       captureSession.addOutput(movieFileOutput) 
      } 

      captureSession.commitConfiguration() 
      captureSession.startRunning() 

      let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) 
      previewLayer.bounds = CGRect(x: 0, y: 0, width: self.view.bounds.width, height: self.view.bounds.height) 
      previewLayer.position = CGPoint(x: CGRectGetMidX(self.view.bounds), y: CGRectGetMidY(self.view.bounds)) 
      previewLayer.videoGravity = AVLayerVideoGravityResize 
      cameraView.layer.addSublayer(previewLayer) 

     } 

     catch let error as NSError { 
      print("\(error), \(error.localizedDescription)") 
     } 

    } 

    func startRecording() { 
     let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) 
     let documentsDirectory = paths[0] as NSString 
     let outputFile = documentsDirectory.stringByAppendingPathComponent("output.mov") 
     let outputURL = NSURL(fileURLWithPath:outputFile) 

     movieFileOutput.startRecordingToOutputFileURL(outputURL, recordingDelegate: self) 

    } 

    func stopRecording() { 
     movieFileOutput.stopRecording() 
     captureSession.stopRunning() 
    } 

    func captureOutput(captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAtURL outputFileURL: NSURL!, fromConnections connections: [AnyObject]!, error: NSError!) { 
     print("Video URL =\(outputFileURL)") 
    } 

} 

停止視頻通話AVFoundation委託didFinishRecordingToOutputFileAtURL與參數outputFileURL這是一個路徑錄製的視頻後錄製視頻。

希望這會有所幫助。