【OpenCV学习】摄像头显示、录像、拍照程序

/*
 * =====================================================================================
 *
 *       Filename:  videocapture.cpp
 *
 *    Description:  A Program of Capture the video Camrea
 *
 *        Version:  1.0
 *        Created:  02/02/2009 09:48:27 AM
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Futuredaemon (BUPT), gnuhpc@gmail.com
 *        Company:  BUPT_UNITED
 *
 * =====================================================================================
 */

#include "cv.h"
#include "highgui.h"
#include <stdio.h>
#include <ctype.h>
#include  <time.h>

IplImage *frame=0;

void mouseHandler(int event,int x,int y,int flags,void *param);

int main(int argc , char **argv)
{
    CvCapture *capture = 0;

    int flag= 1;

    int iscolor=1;
    int fps=15;
    int frameW=320;
    int frameH=240;
    int press=0;
    CvVideoWriter    *writer=cvCreateVideoWriter("out.avi",CV_FOURCC('D','I','V','X'),
            fps,cvSize(frameW,frameH),iscolor);

    if (argc==1|| (argc==2 && strlen(argv[1])==1 && isdigit(argv[1][0])))
    {
        capture = cvCaptureFromCAM(-1);
    }
    else if(argc==2)
    {
        capture = cvCaptureFromAVI(argv[1]);
    }

    if (!capture)
    {
        fprintf(stderr,"Could not initialize capturing.../n");
        return -1;
    }

    cvNamedWindow("main",0);

    cvSetMouseCallback("main",mouseHandler,NULL);
    for (;;)
    {

        frame = cvQueryFrame(capture);
        if (!frame)
        {
            break;
        }

        if( flag==0 )
        {
            cvWriteFrame(writer,frame);
        }

        cvShowImage("main",frame);

        if ((press=cvWaitKey(20))=='r')
        {
             if( flag==1 )
             {
                 printf("Starting Record the Video!/n");
                 flag = 0;
             } else
             {
                 printf("Stop the recording!/n");
                 flag = 1;
             }
        }
        else if(press==27)
        {
            break;
        }

    }
   
    cvReleaseCapture(&capture);
    cvDestroyWindow("main");
    return 0;
}

void mouseHandler(int event,int x,int y,int flags,void *param)
{
    time_t curtime=time(NULL);
    char *date=ctime(&curtime);

    switch ( event )
    {
        case CV_EVENT_LBUTTONDOWN :
            printf("Get a picrure named %s/n",date+11);
            sprintf(date,"%s.jpg",date+11);
            cvSaveImage(date,frame);
            break;
        default :
            break;
    }
}