opencv打开摄像头无画面显示

[CN_Wallece]

编程环境：WIN10+OpenCV3.1.0+Qt5.7.1
使用USB3.0双目视觉相机，免装驱动，
编译通过，程序运行，提示“frame success”弹出窗口,但画面一片黑

int main()
{
Mat frame;
VideoCapture capture(1);
if (!capture.isOpened())
{
cout<<"open camera1 failed"<<endl;
return -1;
}
while(1)
{
capture>>frame;
if(frame.empty())
{
cout<<"NO frame!"<<endl;
break;
}
else cout<<"frame success"<<endl;
imshow("1",frame);
if(waitKey(33)==27)
break;
}
return 0;
}

[w1ng]

防火墙？360卫士？