OpenCV学习之摄像头录制存储视频

从摄像头读取数据，显示视频，并保存视频

#include "cv.h"  #include "highgui.h"  #include "iostream"  using namespace std;int main(int argc, char* argv[]){    CvCapture *cap = cvCreateCameraCapture(0);//初始化相机捕获的指针      if (!cap)    {        cout << "create camera capture error..." << endl;        system("pause");        exit(-1);    }    IplImage *tempImg = cvQueryFrame(cap);    double fps = 20;    CvSize size = cvSize(        (int)cvGetCaptureProperty(cap, CV_CAP_PROP_FRAME_WIDTH),        (int)cvGetCaptureProperty(cap, CV_CAP_PROP_FRAME_HEIGHT)    );    CvVideoWriter *writer = cvCreateVideoWriter("test.avi", CV_FOURCC('X', 'V', 'I', 'D'), fps, size);    IplImage *img_out = cvCreateImage(size, 8, 3);    //新建窗口    cvNamedWindow("视频监控", CV_WINDOW_AUTOSIZE);    while ((tempImg = cvQueryFrame(cap)) != NULL)    {        //中值滤波        cvSmooth(tempImg, tempImg, CV_MEDIAN, 3, 3);        //显示视频        cvShowImage("视频监控", tempImg);        //存储视频        cvCopy(tempImg, img_out);        //TL意思是：TopLeft，即左上0;BL意思是：BottomLeft，即左下1        //摄像机origin为1，opencv显示origin为0，所以需要垂直翻转        if (img_out->origin == IPL_ORIGIN_BL)        {            cvFlip(img_out, img_out);            //cvFlip(img_out, NULL, 0);//-1表示水平、垂直翻转，0是垂直翻转，1是水平翻转        }        cvWriteFrame(writer, img_out);        char c = cvWaitKey(10);        if (c == 27) break;    }    //释放空间    cvReleaseImage(&img_out);    cvReleaseCapture(&cap);    cvDestroyWindow("视频监控");    cvReleaseVideoWriter(&writer);    system("pause");    return 0;}