jpg图片转换为avi视频

r囧r小猫 2022-08-02 14:42 330阅读 0赞

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;
    }