Opencv——将摄像头拍摄写成视频文件

这里主要利用了Opencv打开摄像头的代码，以及写入视频的函数，只是这里要注意的是摄像头好像没有帧率，在cvCreateVideoWriter，时要自己设置

 #include"cv.h"
 #include"highgui.h"

 int main(int argc, char** argv)
 {
     cvNamedWindow("camera", CV_WINDOW_AUTOSIZE);
     argc = ;
     CvCapture* capture;
     capture = cvCreateCameraCapture();//如果不行换成-1,0,1试试
     assert(capture != NULL);
     IplImage* frame;
     CvSize size = cvSize((int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH),
         (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT));

     double fps = cvGetCaptureProperty(
                 capture,
                 CV_CAP_PROP_FPS//帧率
                 );
     CvVideoWriter* writer = cvCreateVideoWriter(  // On linux Will only work if you've installed ffmpeg development files correctly,
                 "D:\\Opencv\\testData\\camera.avi",                               // otherwise segmentation fault.  Windows probably better.
                 CV_FOURCC('D', 'X', '', ''),
                 ,//摄像头好像帧率获取出来为0，故设为15
                 size
                 );
     IplImage* imgWrite = cvCreateImage(size, , );
     while (){
         frame = cvQueryFrame(capture);
         if (!frame)
             break;
         char c = cvWaitKey();
             if (c == ) break;
         cvCopy(frame, imgWrite);
         cvWriteToAVI(writer, imgWrite);
         cvShowImage("camera", frame);
     }

     cvReleaseCapture(&capture);
     cvReleaseVideoWriter(&writer);
     cvDestroyWindow("camera");
     return ;
 }