Opencv 视频转为图像序列

本系列文章由 @YhL_Leo 出品，转载请注明出处。
文章链接： http://blog.csdn.net/yhl_leo/article/details/50283303

基于OpenCV的视频转为图像序列方法：

• 基于C++版本

#include <iostream>

#include "cv.h"
#include "opencv2/opencv.hpp"

using namespace std;
using namespace cv;

void main()
{
    VideoCapture cap("C:\\Users\\Leo\\Desktop\\Megamind.avi");
    if ( !cap.isOpened() )
    {
        return ;
    }

    int imgIndex(0);
    for ( ; ; )
    {
        Mat frame;
        cap >> frame;
        if ( frame.empty() )
        {
            break;
        }

        char* imageSaveName = new char[64];
        sprintf( imageSaveName, "C:\\Users\\Leo\\Desktop\\new\\%05d.jpg", imgIndex );
        imwrite( imageSaveName, frame );
        delete[] imageSaveName;
        imgIndex++;
    }
    cout << "total frames: " << imgIndex << endl;
}

• 基于C版本

#include <iostream>

#include "cv.h"
#include "opencv2/opencv.hpp"

using namespace std;
using namespace cv;

void main()
{
    // video read
    CvCapture *capture = cvCreateFileCapture("C:\\Users\\Leo\\Desktop\\Megamind.avi");
    IplImage *frame;

    int imgIndex(0);
    while(1)
    {
        frame = cvQueryFrame(capture);
        if ( !frame )
        {
            break;
        }

        char* imageSaveName = new char[64];
        sprintf( imageSaveName, "C:\\Users\\Leo\\Desktop\\new\\%05d.jpg", imgIndex );
        cvSaveImage( imageSaveName, frame );
        delete[] imageSaveName;
        imgIndex++;
    }
    cout << "total frames: " << imgIndex << endl;
    cvDestroyWindow( "VideoImage" );
    cvReleaseCapture( &capture );
    cvReleaseImage( &frame );
}

测试数据为OpenCV自带的视频：Megamind.avi，可以在opencv\sources\samples\cpp\tutorial_code\HighGUI\video-input-psnr-ssim\video路径下查找，共270帧图像，运行结果部分截图如下：