jpg图片转换为avi视频

要用到视频序列，目前只有jpg图片，所以参考了一些网络资料，并做修改，转化测试成功。

程序：

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <cv.h>
#include <highgui.h>
#define NUM_FRAME 300 //只处理前300帧，根据视频帧数可修改

void Video_to_image(char* filename,const char* dirname)
{
	printf("------------- video to image ... ----------------\n");
	//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 : %d\n\tvideo width : %d\n\tfps : %d\n\tframe numbers : %d\n", frameH, frameW, fps, numFrames);
	//定义和初始化变量
	int i = 0;
	IplImage* img = 0;
	char image_name[130];

	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
		char key = cvWaitKey(20);

		sprintf(image_name, "%s%s%d%s", dirname,"outImage", i++, ".jpg");//保存的图片名

		cvSaveImage(image_name, img); //保存一帧图片

		if (i == NUM_FRAME) break;
	}
	cvReleaseCapture(&capture);
	cvDestroyWindow("mainWin");
}
void Image_to_video(const char* in,const char* out)
{
	int num = 1;
	CvSize size = cvSize(1024, 768);  //视频帧格式的大小
	double fps = 30; //每秒钟的帧率
	CvVideoWriter *writer = cvCreateVideoWriter(out, CV_FOURCC('D', 'I', 'V', 'X'), fps, size); //创建视频文件
	char cname[100];
	sprintf(cname,in , num); //加载图片的文件夹，图片的名称编号是1开始1，2,3,4,5.。。。
	IplImage *src = cvLoadImage(cname);
	if (!src)
	{
		return;
	}
	IplImage *src_resize = cvCreateImage(size, 8, 3); //创建视频文件格式大小的图片
	cvNamedWindow("avi");
	while (src)
	{
		cvShowImage("avi", src_resize);
		cvWaitKey(1);
		cvResize(src, src_resize); //将读取的图片设置为视频格式大小相同
		cvWriteFrame(writer, src_resize); //保存图片为视频流格式
		cvReleaseImage(&src); //释放空间
		num++;
		sprintf(cname,in, num);
		src = cvLoadImage(cname);       //循环读取数据
	}
	cvReleaseVideoWriter(&writer);
	cvReleaseImage(&src_resize);
}

int main(int argc, char *argv[])
{
	char infilename[130] = "C:/Users/jiang/Desktop/output/infile.avi";
	const char *dirname = "C:/Users/jiang/Desktop/output/tupian/";
	//Video_to_image(infilename,dirname); //视频转图片
	const char *outImagename = "C:/Users/jiang/Desktop/output/breakdancer/cam3/3pic (%d).jpg";
	const char *outVideoname = "C:/Users/jiang/Desktop/output/3outfile.avi";
	Image_to_video(outImagename,outVideoname ); //图片转视频
	return 0;
}