OpenCV学习：播放avi视频文件

#if 0
//播放avi视频文件（IplImage）
#include <opencv2/opencv.hpp>
using namespace std;  

#pragma comment(linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"")  

int main()
{
    const char *pstrAviFileName = ".\\Res\\Microsoft_split.avi";
    const char *pstrWindowsTitle = "OpenCV.avi";  

    // 从文件中读取图像
    CvCapture* pCapture = cvCaptureFromFile(pstrAviFileName);
    if (!pCapture)
    {
        cout << "Fail to capture avi file!" << endl;
        return -;
    }
    IplImage *pImage = NULL; 

    //创建窗口
    cvNamedWindow(pstrWindowsTitle, CV_WINDOW_AUTOSIZE);  

    while()
    {
        pImage = cvQueryFrame(pCapture);
        if (!pImage)
        {
            cout << "Fail to query avi frame image!" << endl;
            break;
        }
        //在指定窗口中显示图像
        cvShowImage(pstrWindowsTitle, pImage);
        if (cvWaitKey() >= )
        {
            break;
        }
    }

    cvReleaseCapture(&pCapture);
    cvDestroyWindow(pstrWindowsTitle);  

    return ;
}
#endif

#if 1
//播放avi视频文件（Mat）
#include <opencv2/opencv.hpp>
using namespace std;
using namespace cv;

#pragma comment(linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"")  

int main()
{
    const char *pstrAviFileName = ".\\Res\\AviDemo.avi";
    const char *pstrWindowsTitle = "OpenCV.avi";   

    VideoCapture cap(pstrAviFileName);
    //检查是否成功打开
    if(!cap.isOpened())
    {
        cerr << "Can not open a camera or file." << endl;
        return -;
    }
    Mat im;  

    //创建窗口
    cvNamedWindow(pstrWindowsTitle, CV_WINDOW_AUTOSIZE);
    while()
    {
        cap >> im;
        if (im.empty())
        {
            break;
        }
        //在指定窗口中显示图像
        imshow(pstrWindowsTitle, im);
        if(waitKey() >= )
        {
            break;
        }
    }
    //退出时会自动释放cap中占用资源

    return ;
}
#endif

运行结果：