string VideoSavePath = AppDomain.CurrentDomain.BaseDirectory;  
string videopath = "";
private void CreateVideo_Click(object sender, EventArgs e)
{
    //string VideoSavePath = AppDomain.CurrentDomain.BaseDirectory;            
    FolderBrowserDialog dlg = new FolderBrowserDialog();
    dlg.Description = "请选择视频保存路径";
    dlg.SelectedPath = VideoSavePath;
    if (DialogResult.OK == dlg.ShowDialog())
    {
        VideoSavePath = dlg.SelectedPath;
        SaveVideoPathDisplay.Text = VideoSavePath;
        videopath = VideoSavePath+"\\" + "OutputVideo.avi";
        string task_path = pImgFileDir;
        if (!Directory.Exists(task_path))
        {
            MessageBox.Show("未选择生成视频的源图片文件夹路径");
            return;
        }
        DirectoryInfo dir = new DirectoryInfo(task_path);
        int imagecount = 0; int width1 = 0; int height1 = 0;
        DateTime dt1 = DateTime.Now;
        foreach (FileInfo file in dir.GetFiles("*.bmp", SearchOption.AllDirectories))
        {
            imagecount = imagecount + 1;
            string Imagepath = file.FullName;
            //Bitmap image0 = file2img(Imagepath);
            //Mat matimg = OpenCvSharp.Extensions.BitmapConverter.ToMat(image0); 
            Mat mat_res_8 = Cv2.ImRead(Imagepath, ImreadModes.Grayscale);
            width1 = mat_res_8.Width; height1 = mat_res_8.Height;
            break;
        }
        if (imagecount > 0 & width1 > 0 & height1 > 0)
        {
            int fpsint = (Int32)numericUpDown3.Value;
            video = new VideoWriter(videopath, VideoWriter.FourCC('X', 'V', 'I', 'D'), fpsint,
                    new OpenCvSharp.Size((double)width1, (double)height1), false);
            OnNotifyShowRecieveMsg("开始生成视频");
            foreach (FileInfo file in dir.GetFiles("*.bmp", SearchOption.AllDirectories))
            {
                string Imagename = file.Name;
                string Imagepath = file.FullName;
                Mat mat_res_8 = Cv2.ImRead(Imagepath, ImreadModes.Grayscale);
                //CreateVideoFromImage(mat_res_8);
                video.Write(mat_res_8);
                if (Cv2.WaitKey(1) == 27)//隐藏指令：按ESC可停止生成视频
                {
                    break;
                }
            }
            video.Release();
            OnNotifyShowRecieveMsg("生成视频已完成");
            DateTime dt2 = DateTime.Now;
            TimeSpan ts = dt2.Subtract(dt1);
            double bb = (dt2 - dt1).Ticks / 10000000;//转换成秒
            Int32 NowMinu = (Int32)ts.TotalSeconds;
            OnNotifyShowRecieveMsg("生成时间:" + NowMinu+"S");
            string ExplorPath = VideoSavePath;
            //if (Directory.Exists(ExplorPath))
            //    System.Diagnostics.Process.Start(ExplorPath);
            if (Directory.Exists(ExplorPath))
            {
                if (File.Exists(videopath))
                {
                    OnNotifyShowRecieveMsg("自动打开视频路径");
                    string pathnew = "/select," + videopath;
                    System.Diagnostics.Process.Start("Explorer.exe", @pathnew);
                }                      
            }
        }
        else
        {
            MessageBox.Show("选择路径下无对应图片,无法生成视频");
        }
    }          
}