实战深度学习OpenCV(二)：读取并播放本地或者摄像头的视频

一.读取并播放的代码如下：

#include "pch.h"
#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>

using namespace cv;

int main()
{
    VideoCapture a;
    a.open("C://Users//lenovo//Desktop//geeksong.mp4");
    while ()
    {
        Mat frame;
        a >> frame;
        imshow("读取视频", frame);
        waitKey();

    }

    return ;
}

二.获取摄像头里的视频，只需要将读取视频的路径改为0就可以了：

#include "pch.h"
#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>

using namespace cv;

int main()
{
    VideoCapture a;
    a.open();
    while ()
    {
        Mat frame;
        a >> frame;
        imshow("读取视频", frame);
        waitKey();

    }

    return ;
}