5,关于摄像头的操作,打开,拍照,录视频

接下来要准备开始玩摄像头了
直接上代码:

static void Main(string[] args)
{
    VideoCapture video = new VideoCapture(0);
    if (!video.IsOpened())
    {
        Console.WriteLine("摄像头打开失败");
        return;
    }
    Mat photo = new Mat();
    while (true)
    {
        Mat Camera = new Mat();
        Mat GaryMart = new Mat();
        video.Read(Camera);
        if (Camera.Empty())//读取视频文件时,判定帧是否为空,如果帧为空,则下方的图片处理会报异常
        {
            break;
        }
        //Cv2.CvtColor(Camera, GaryMart, ColorConversionCodes.RGBA2BGR);
        //Cv2.Canny(GaryMart, Camera, 100, 200); //边缘检测
          //Cv2.CvtColor(Camera, Camera, ColorConversionCodes.HSV2RGB_FULL);//将图像转为HSV2RGB_FULL
           Window Camera1 = new Window("Camera", WindowMode.Normal, Camera);
        if (Cv2.WaitKey(30)==27 || Cv2.WaitKey(30) == 32)//类似于拍照功能,按下Esc或空格键推出While并且将最后一帧照片显示
        {
            Camera.CopyTo(photo);
            break;
        }
    }
    Window photo1 = new Window("Photo", WindowMode.Normal, photo);
    Cv2.WaitKey(0);
}

VideoCapture video = new VideoCapture(0);
摄像机的index是如上图所示,依次为0.1.2…可以禁用排在前面的摄像头,来使得所需的摄像头index为0

视频录制
视频录制的大体跟拍照什么的都类似,只有下方加粗的部分有区别
特别注意的是 VideoWriter.FourCC,编码格式,请用”转到定义”看怎么定义这个转码格式

static void Main(string[] args)
{
    VideoCapture video = new VideoCapture(0);
   // FourCC fourCC = VideoWriter.FourCC(@"XVID");
    **VideoWriter videoWriter = new VideoWriter(@"out.avi", VideoWriter.FourCC(@"XVID"), 20, new Size(640,480),true);**
    if (!video.IsOpened())
    {
        Console.WriteLine("摄像头打开失败");
        return;
    }
    Mat photo = new Mat();
    while (true)
    {
        Mat Camera = new Mat();
        Mat GaryMart = new Mat();
        video.Read(Camera);
        if (Camera.Empty())//读取视频文件时,判定帧是否为空,如果帧为空,则下方的图片处理会报异常
        {
            break;
        }
        //Cv2.CvtColor(Camera, GaryMart, ColorConversionCodes.RGBA2BGR);
        //Cv2.Canny(GaryMart, Camera, 100, 200); //边缘检测
        //Cv2.CvtColor(Camera, Camera, ColorConversionCodes.HSV2RGB_FULL);//将图像转为HSV2RGB_FULL
        **videoWriter.Write(Camera);**
        Window Camera1 = new Window("Camera", WindowMode.Normal, Camera);
        if (Cv2.WaitKey(30)==27 || Cv2.WaitKey(30) == 32)//类似于拍照功能,按下Esc或空格键推出While并且将最后一帧照片显示
        {
            Camera.CopyTo(photo);
            break;
        }
    }
    Window photo1 = new Window("Photo", WindowMode.Normal, photo);
    Cv2.WaitKey(0);
}