IAMAnalogVideoDecoder * pDecoder = NULL;
pCapture->QueryInterface(IID_IAMAnalogVideoDecoder, (void **)&pDecoder);//pCapture为摄像头Filter
if (pDecoder)
{
pDecoder->Release();
MessageBox("DT_Analog_WDM");
}
无法获得!!!!!!!!Why??
pCapture->QueryInterface(IID_IAMAnalogVideoDecoder, (void **)&pDecoder);//pCapture为摄像头Filter
if (pDecoder)
{
pDecoder->Release();
MessageBox("DT_Analog_WDM");
}
无法获得!!!!!!!!Why??
可以通过返回的HRESULT来确定