Question

新手 关于opencv摄像头捕捉

版本是 vs2008+opencv2.4.5 配置都是好的 下面的代码是捕捉摄像头视频的 运行后大概能捕捉到两秒 然后就出现 “test.exe 停止工作” 新手求指教
#include "stdafx.h"
#include "opencv2/opencv.hpp"
#include <iostream>

using namespace std;
using namespace cv;

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

CvVideoWriter* writer = 0;
int isColor = 1;
int fps = 25;
int frameW = 640;
int frameH = 480;
writer = cvCreateVideoWriter("out.avi", CV_FOURCC('P', 'I', 'M', '1'), fps, cvSize(frameW, frameH), isColor);

IplImage* img = 0;
int nFrames = 50;

for(int i = 0; i < nFrames; i ++)
{
cvGrabFrame(capture);
img = cvRetrieveFrame(capture);
cvWriteFrame(writer, img);
}

cvNamedWindow("myWin", CV_WINDOW_AUTOSIZE);
cvShowImage("myWin", img);
cvWaitKey(20);

cvReleaseVideoWriter(&writer);
cvReleaseCapture(&capture);
cvReleaseImage(&img);
cvDestroyWindow("myWin");
return 0;
}

Answer 1

我好像没有找到你为生成的视频分配内存的语句