学步园

/*********************************************************************************************************************************************/<br /> //设置拍照分辨率<br /> HRESULT hr=0xff,hr1=0xff;<br /> int iCount,iSize;<br /> IAMStreamConfig *pConfig = NULL;<br /> VIDEO_STREAM_CONFIG_CAPS scc;</p> <p> CHK(m_pCaptureGraphBuilder->FindInterface(&PIN_CATEGORY_STILL, &MEDIATYPE_Video, m_pVideoCaptureFilter, IID_IAMStreamConfig, (void **) &pConfig)); </p> <p> CHK(pConfig->GetNumberOfCapabilities(&iCount, &iSize));</p> <p> AM_MEDIA_TYPE *pmt;<br /> //参数1: 0是320*240， 1是640*480， 2是1024*768， 3是2048*1536<br /> CHK(pConfig ->GetStreamCaps(2, &pmt, (BYTE*)&scc));<br /> CHK(pConfig->SetFormat(pmt));<br /> DeleteMediaType(pmt);<br /> /********************************************************************************************************************************************/</p> <p> //18,创建Still Pin，用于抓图<br /> CHK(m_pImageSinkFilter.CoCreateInstance(CLSID_IMGSinkFilter));<br /> CHK(m_pGraphBuilder->AddFilter(m_pImageSinkFilter, L"Still image filter" ));<br /> CHK(m_pCaptureGraphBuilder->RenderStream( &PIN_CATEGORY_STILL, &MEDIATYPE_Video, m_pVideoCaptureFilter, NULL, m_pImageSinkFilter ));

一定要在创建Still Pin之前选好分辨率；