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 = 1;
    CvCapture* capture;
    capture = cvCreateCameraCapture(1);//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', '5', '0'),
                15,//摄像头好像帧率获取出来为0，故设为15
                size
                );
    IplImage* imgWrite = cvCreateImage(size, 8, 3);
    while (1){
        frame = cvQueryFrame(capture);
        if (!frame)
            break;
        char c = cvWaitKey(10);
            if (c == 27) break;
        cvCopy(frame, imgWrite);
        cvWriteToAVI(writer, imgWrite);
        cvShowImage("camera", frame);
    }

    cvReleaseCapture(&capture);
    cvReleaseVideoWriter(&writer);
    cvDestroyWindow("camera");
    return 0;
}