为什么WIN7下DirectShow摄像头打不开

[Strong08]

为什么WIN7下DirectShow摄像头打不开，注释如下代码就可以打开了，但是注释这段代码应该有问题哦
// Fix upsidedown video // If we are using a still pin, ask for a picture
if (videoControl != null)
{
VideoControlFlags pCapsFlags;

IPin pPin = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
hr = videoControl.GetCaps(pPin, out pCapsFlags);
DsError.ThrowExceptionForHR(hr);

if ((pCapsFlags & VideoControlFlags.FlipVertical) > 0)
{
hr = videoControl.GetMode(pPin, out pCapsFlags);
DsError.ThrowExceptionForHR(hr);
hr = videoControl.SetMode(pPin, 0);// Tell the camera to send an image
}
}

[Strong08]

自己给自己顶下哦，寻找高手~~