记录一个基于C++实现的将视频流帧转换为图片

/*  avi2jpg 函数，将摄像头当前帧保存为jpg格式照片 */ void Video_to_image(CvCapture* capture){//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] = "1";//读取和显示while(1){img = cvQueryFrame(capture); //获取一帧图片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;}}