& # 39; Emgu.CV.Invoke& # 39;抛出异常

我是一个相对较新的EmguCV，但我做了很多研究，阅读了一些教程，并通过这个网站寻找答案。所有其他有类似问题的人都被告知将未管理的dll添加到输出文件夹中。我已经这样做了，我仍然得到这个错误'Emgu.CV。Invoke抛出了一个异常。

using Emgu.CV;
using Emgu.Util;
using Emgu.CV.Structure;
using AForge;
using AForge.Video;
using AForge.Video.DirectShow;
using AForge.Video.VFW;
using System.Drawing.Imaging;
using System.IO;

namespace WindowsFormsApplication2
{
    public partial class SandBox : Form
    {
        private bool DeviceExist = false;
        public VideoCaptureDevice FinalVideoSource;
        public FilterInfoCollection VideoCaptureDevices;
        private Capture capture;
        private VideoWriter captureOutput;

        private void FinalVideoSource_NewFrame(object sender, AForge.Video.NewFrameEventArgseventArgs)
    {
        Bitmap image = (Bitmap)eventArgs.Frame.Clone();
        image.RotateFlip(RotateFlipType.Rotate180FlipY);
        pictureBox1.Image = image;
    }
    public SandBox()
    {
        InitializeComponent();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
        label1.Text = " ";
        FPS.Text = " ";
        try
        {
            VideoCaptureDevices = new FilterInfoCollection(AForge.Video.DirectShow.FilterCategory.VideoInputDevice);
            DeviceExist = true;
            foreach (AForge.Video.DirectShow.FilterInfo VideoCaptureDevice in VideoCaptureDevices)
            {
                comboBox1.Items.Add(VideoCaptureDevice.Name);
            }
            comboBox1.SelectedIndex = 0;
        }
        catch (ApplicationException)
        {
            DeviceExist = false;
            comboBox1.Items.Add("No device on your system");
        }
    }
    private void Start_Click(object sender, EventArgs e)
    {
        FinalVideoSource = new VideoCaptureDevice(VideoCaptureDevices[comboBox1.SelectedIndex].MonikerString);
        FinalVideoSource.NewFrame += new NewFrameEventHandler(FinalVideoSource_NewFrame);
        FinalVideoSource.Start();
        label1.Text = "Device running...";
        Start.Enabled = false;
        Stop.Enabled = true;
        timer1.Enabled = true;
        capture = new Capture();
        captureOutput = new VideoWriter("test.avi", 30, 1280, 720, true);
        Image<Bgr, Byte> ImageFrame = capture.QueryFrame();
        captureOutput.WriteFrame(ImageFrame);
    }
}

在capture = new Capture();行抛出错误。我不知道这个项目出了什么问题。澄清一下，我只是使用EmguCV来录制视频，而不是在屏幕上显示。