[opencv]3.获取摄像头的视频流

来源：互联网发布：软件实施过程文档编辑：程序博客网时间：2024/05/22 01:49

跟之前打开一段本地视频和一张图片一样，打开摄像头的视频流也是类似的。
这里就直接贴出代码块了。

#include "opencv2/highgui/highgui.hpp"#include <iostream>using namespace cv;using namespace std;int main(int argc, char* argv[]){    VideoCapture cap(0); // 打开摄像头0    if (!cap.isOpened())  // 异常处理    {        cout << "Cannot open the video cam" << endl;        waitKey(60000);        return -1;    }    double dWidth = cap.get(CV_CAP_PROP_FRAME_WIDTH); //输入流的宽    double dHeight = cap.get(CV_CAP_PROP_FRAME_HEIGHT); //输入流的高    cout << "Frame size : " << dWidth << " x " << dHeight << endl;    namedWindow("MyVideo", CV_WINDOW_AUTOSIZE); //创建一个窗体    while (1)    {        Mat frame;        bool bSuccess = cap.read(frame); // 获取一帧        if (!bSuccess) //异常处理        {            cout << "Cannot read a frame from video stream" << endl;            break;        }        imshow("MyVideo", frame); //显示获取到的视频帧        if (waitKey(30) == 27) //按键退出        {            cout << "esc key is pressed by user" << endl;            break;        }    }    waitKey(60000);    return 0;}

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