opencv视频转图像&图像转视频

#include<stdlib.h>
#include<stdio.h>
#include<imgproc\imgproc.hpp>
#include<highgui\highgui.hpp>
#include<windows.h>
using namespace cv;

#define NUM_FRAME 600
#define IMAGE2VIDEO 1
#define VIDEO2IMAGE 0

void Video2Image(char* filename)
{
    //初始化一个视频文件捕捉器
    CvCapture* capture = cvCaptureFromAVI(filename);
    //获取视频信息
    cvQueryFrame(capture);
    int frameH = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT);
    int frameW = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH);
    int fps = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FPS);
    int numFrames = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT);
    printf("tvideo height : %dntvideo width : %dntfps : %dntframe numbers : %dn", frameH, frameW, fps, numFrames);
    //定义和初始化变量
    int i = 0;
    IplImage* img = 0;
    char image_name[13];
    cvNamedWindow( "mainWin", CV_WINDOW_AUTOSIZE );
    //读取和显示
    while(1)
    {
        img = cvQueryFrame(capture);    //获取一帧图片
        cvShowImage( "mainWin", img );    //将其显示
        cvWaitKey(1);
        sprintf(image_name, "%s%d%s", "image", ++i, ".jpg");//保存的图片名
        cvSaveImage(image_name, img); //保存一帧图片
        Sleep(1000);
        if(i == NUM_FRAME)
            break;
    }
    cvReleaseCapture(&capture);
    cvDestroyWindow("mainWin");
}

void Image2Video()
{
    int i = 0;
    IplImage* img = NULL;
    char image_name[13];
    char key = 0;
    //初始化视频编写器，参数根据实际视频文件修改
    CvVideoWriter *writer = NULL;
    int isColor = 1;
    int fps = 30;
    int frameW = 320;
    int frameH = 240;
    writer = cvCreateVideoWriter("out.avi",CV_FOURCC('X','V','I','D'),fps,cvSize(frameW,frameH),isColor);
    VideoCapture cap(0);    //打开默认摄像头
    if(!cap.isOpened())
        exit(1);

    //创建窗口
    cvNamedWindow( "mainWin", CV_WINDOW_AUTOSIZE );
    Mat Image(cvSize(320,240),CV_8UC3);
    while(i < NUM_FRAME)
    {
#if 0
        sprintf(image_name, "%s%d%s", "image", ++i, ".jpg");
        img = cvLoadImage(image_name);
#endif

        cap>>Image;
        imshow("mainWin", Image);
        key = cvWaitKey(20);

        img = &IplImage(Image);

        cvWriteFrame(writer, img);
        i++;
    }
    cvReleaseVideoWriter(&writer);
    cvDestroyWindow("mainWin");
}

int main(int argc, char *argv[])
{
    char filename[13] = "out.avi";
#if IMAGE2VIDEO
    Image2Video();
#else if VIDEO2IMAGE
    Video2Image(filename);
#endif
    return 0;
}