Emgu.CV.Capture.Grab C# (CSharp) Метод

      public virtual bool Grab()
      {
         bool grabbed = CvInvoke.cvGrabFrame(_ptr);
         if (grabbed && ImageGrabbed != null)
            ImageGrabbed(this, new EventArgs());
         return grabbed;
      }

        private void run()
        {
            Image<Bgr, Byte> image = new Image<Bgr, byte>("lena.jpg"); //Read the files as an 8-bit Bgr image
            Capture vid = new Capture("kw.avi");
            vid.FlipVertical = true;
            int x = 0;
            TimeSpan time = TimeSpan.Zero;
            MCvFont font = new MCvFont(Emgu.CV.CvEnum.FONT.CV_FONT_HERSHEY_COMPLEX, 1.0, 1.0);
            using (VideoWriter vw = new VideoWriter("out3.avi", 15, 640, 480, true))
            {

                while (vid.Grab())
                {
                    //if (++x % 1 != 0) continue;

                    image = vid.RetrieveBgrFrame();

                    long detectionTime;
                    List<Rectangle> faces = new List<Rectangle>();
                    List<Rectangle> eyes = new List<Rectangle>();
                    DetectFace.Detect(image, "haarcascade_frontalface_default.xml", "supersmile.xml", faces, eyes, out detectionTime);
                    foreach (Rectangle face in faces)
                        image.Draw(face, new Bgr(Color.Red), 2);
                    foreach (Rectangle eye in eyes)
                        image.Draw(eye, new Bgr(Color.Blue), 2);
                    if (eyes.Count > 0) time = time.Add(new TimeSpan(0, 0, 0, 0, 66));
                    //display the image
                    image.Draw(String.Format("{0}:{1}", time.Seconds, time.Milliseconds), ref font, new Point(50, 50), new Bgr(0, 0, 255));
                    setimage(image);
                    vw.WriteFrame<Bgr, Byte>(image);
                }
            }
        }