QT 4.7.6 驱动 罗技C720摄像头

/*
*  filename: OpenCv_test.cpp 
*/ 

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <cv.hpp>
#include <cxcore.hpp>
#include <video/video.hpp>

using namespace cv;


int main()
{
    VideoCapture cap(0);
    if(!cap.isOpened())
    {
        return -1;
    }
    Mat frame;
    Mat edges;

    bool stop = false;
    while(!stop)
    {
        cap>>frame;
        cvtColor(frame, edges, /*CV_BGR2RGB*/CV_BGR2BGRA ); // 0


       // GaussianBlur(edges, edges, Size(7,7), 1.5, 1.5);
        //Canny(edges, edges, 0, 30, 3);
        imshow("Camera",edges);
        if(waitKey(30) >=0)
            stop = true;
    }
    return 0;
}

SOURCES +=     OpenCv_test.cpp

HEADERS +=

INCLUDEPATH += E:\OpenCv_3.0.0_build\include                 E:\OpenCv_3.0.0_build\include\opencv  E:\OpenCv_3.0.0_build\include\opencv2

LIBS += E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_calib3d300.dll.a         E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_core300.dll.a         E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_features2d300.dll.a         E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_flann300.dll.a        E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_hal300.a        E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_highgui300.dll.a        E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_imgproc300.dll.a        E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_imgcodecs300.dll.a         E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_ml300.dll.a        E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_objdetect300.dll.a        E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_photo300.dll.a         E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_video300.dll.a        E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_videoio300.dll.a         E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_videostab300.dll.a         E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_shape300.dll.a         E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_stitching300.dll.a         E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_superres300.dll.a         E:\OpenCv_3.0.0_build\x86\mingw\lib\libopencv_ts300.a