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 ... ---------------- "); //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(" video height : %d video width : %d fps : %d frame numbers : %d ", 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 ... ---------------- "); //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(" video height : %d video width : %d fps : %d ", 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... "); 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; } //--------------------------------------------------------------------------------