图像处理---视频<->图片

缺乏、安全感 2023-06-01 08:42 13阅读 0赞

**图像处理---视频<->图片**

// 该程序实现视频和图片的相互转换.
    // Image_to_video()函数将一组图片合成AVI视频文件.
    // Video_to_image()函数将AVI视频文件读入，将每一帧存储为jpg文件.
    //
    
    #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)
    {
        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[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
            char key = cvWaitKey(20);
    
            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 
    
            if(i == NUM_FRAME) break;
        }
        cvReleaseCapture(&capture);
        cvDestroyWindow("mainWin");
    }
    void Image_to_video()
    {
        int i = 0;
        IplImage* img = 0;
        char image_name[13];
        printf("------------- image to video ... ----------------\n");
        //初始化视频编写器，参数根据实际视频文件修改
        CvVideoWriter *writer = 0;
        int isColor = 1;
        int fps = 30; // or 25
        int frameW = 400; // 744 for firewire cameras
        int frameH = 240; // 480 for firewire cameras
        writer=cvCreateVideoWriter("out.avi",CV_FOURCC('X','V','I','D'),fps,cvSize(frameW,frameH),isColor);
        printf("\tvideo height : %d\n\tvideo width : %d\n\tfps : %d\n", frameH, frameW, fps);
        //创建窗口
        cvNamedWindow( "mainWin", CV_WINDOW_AUTOSIZE );
        while(i<NUM_FRAME)
        {
            sprintf(image_name, "%s%d%s", "image", ++i, ".jpg");
            img = cvLoadImage(image_name);
            if(!img)
            {
                printf("Could not load image file...\n");
                exit(0);
            }
            cvShowImage("mainWin", img);
            char key = cvWaitKey(20);
            cvWriteFrame(writer, img);
        }
        cvReleaseVideoWriter(&writer);
        cvDestroyWindow("mainWin");
    }
    
    int main(int argc, char *argv[])
    {
        char filename[13] = "infile.avi";
        Video_to_image(filename); //视频转图片
        Image_to_video(); //图片转视频
        return 0;
    }
    //--------------------------------------------------------------------------------

转载于:https://www.cnblogs.com/carle-09/p/11589705.html