请教用emgu CV怎么播放本地的视频文件并提取帧呢，用Capture类实现

请问用emgu CV如何播放本地的视频文件并提取帧呢，用Capture类实现
我在网上参考人家的写法：

private void button1_Click(object sender, EventArgs e)

        {




            Capture capture = new Capture("d:\\1.mp4");


            while (true)

            {

                Image<Bgr, Byte> frame = capture.QueryFrame();


                if (frame != null)

                {

                    Image<Gray,byte> grayFrame = frame.Convert<Gray,byte>();


                    grayFrame.Resize(this.Width,this.Height,INTER.CV_INTER_CUBIC);


                    this.imageBox1.Image = grayFrame;

                   // RefreshPictureBoxDelegate fresh = this.RefreshPictureBox;


                    //this.BeginInvoke(fresh,grayFrame.ToBitmap());



                    //imageBox1.Image = frame;

                }


                //Thread.Sleep(500);

            }


        }

        public delegate void RefreshPictureBoxDelegate(Bitmap frame);


        private void RefreshPictureBox(Bitmap frame)  

        {  

           this.pictureBox1.Image = frame;

           //this.imageBox1.Image = frame;

        } 

这样界面会卡死，请问怎么解决去播放视频，或者有个emgu CV播放视频文件的例子呢
------解决思路----------------------

public partial class Form1 : Form

{

    Capture _capture;

    public Form1()

    {

        InitializeComponent();

        _capture = new Capture();

        _capture.ImageGrabbed += _capture_ImageGrabbed;

        _capture.Start();

    }


    void _capture_ImageGrabbed(object sender, EventArgs e)

    {

        var frame = _capture.RetrieveBgrFrame();

        pic.Image = frame.Bitmap;

    }

}