DirectX运行问题，老是运行出错，有谁遇到同样问题？

[BenLeak]

定义 CComPtr< IGraphBuilder > m_pGraph;

使用
... ...

// run the graph
CComQIPtr< IMediaControl, &IID_IMediaControl > pControl(m_pGraph);
hr = pControl->Run();
if(FAILED(hr))
{
... // 老是运行到这里，出错，视频采集窗口没有任何数据
return hr;
}
return 0;

原来是好的，重装系统之后就不行了
WinXP SP2、DirectX 9.0C，我还重装了 DirectX 8.1、9.0C 还是不行
同样的程序在 Vista 下运行正常

有谁遇到过同样的问题呀？怎么解决呢？

[蒋晟]

graph里面有些什么？
可能是音视频解码器没装

[BenLeak]

HRESULT TStillCapDlg::InitStillGraph( )
{
HRESULT hr;

// create a filter graph
// ShowMessage("InitStillGraph Function");
hr = m_pGraph.CoCreateInstance( CLSID_FilterGraph );
if( !m_pGraph )
{
Error( "错误(1):Could not create filter graph" );
return E_FAIL;
}

// get whatever capture device exists
CComPtr< IBaseFilter > pCap;
GetDefaultCapDevice( &pCap );
if( !pCap )
{
Error( "错误(2):No video capture device was detected on your system.\r\n\r\n"
"This sample requires a functional video capture device, such\r\n"
"as a USB web camera." );
return E_FAIL;
}

// add the capture filter to the graph
hr = m_pGraph->AddFilter( pCap, L"Cap" );
if( FAILED( hr ) )
{
Error( "错误(3):Could not put capture device in graph" );
return E_FAIL;
}

// create a sample grabber
hr = m_pGrabber.CoCreateInstance( CLSID_SampleGrabber );
if( !m_pGrabber )
{
Error( "错误(4):Could not create SampleGrabber (is qedit.dll registered?)" );
return hr;
}
CComQIPtr< IBaseFilter, &IID_IBaseFilter > pGrabBase( m_pGrabber );

// force it to connect to video, 24 bit
CMediaType VideoType;
VideoType.SetType( &MEDIATYPE_Video );
VideoType.SetSubtype( &MEDIASUBTYPE_RGB24 );
//VideoType.SetSubtype( &MEDIASUBTYPE_Overlay);
hr = m_pGrabber->SetMediaType( &VideoType ); // shouldn't fail
if( FAILED( hr ) )
{
Error( "错误(5):Could not set media type" );
return hr;
}

// add the grabber to the graph
hr = m_pGraph->AddFilter( pGrabBase, L"Grabber" );
if( FAILED( hr ) )
{
Error( "错误(6):Could not put sample grabber in graph" );
return hr;
}
// find the two pins and connect them
IPin * pCapOut = GetOutPin( pCap, 0 ); // 这里出错
SetupRecordingFormat(pCapOut);
IPin * pGrabIn = GetInPin( pGrabBase, 0 );
hr = m_pGraph->Connect( pCapOut, pGrabIn );
if( FAILED( hr ) )
{
Error( "错误(7):Could not connect capture pin #0 to grabber.\r\n"
"Is the capture device being used by another application?" );
return hr;
}

// render the sample grabber output pin, so we get a preview window
IPin * pGrabOut = GetOutPin( pGrabBase, 0 );
hr = m_pGraph->Render( pGrabOut );
if( FAILED( hr ) )
{
Error( "错误(8):Could not render sample grabber output pin" );
return hr;
}

// ask for the connection media type so we know how big
// it is, so we can write out bitmaps
AM_MEDIA_TYPE mt;
m_pGrabber->GetConnectedMediaType( &mt );
VIDEOINFOHEADER * vih = (VIDEOINFOHEADER*) mt.pbFormat;
//vih->bmiHeader.biWidth=g_VideoWidth;
//vih->bmiHeader.biHeight=g_VideoHeight;
//m_pGrabber->SetMediaType( &mt );
// m_pGrabber->GetConnectedMediaType( &mt );

mCB.m_pOwner = this;
mCB.m_lWidth = vih->bmiHeader.biWidth;
mCB.m_lHeight = vih->bmiHeader.biHeight;

FreeMediaType( mt );
// GetVideoInput();

// don't buffer the samples as they pass through
m_pGrabber->SetBufferSamples( FALSE );
//m_pGrabber->SetBufferSamples( TRUE );

// only grab one at a time, stop stream after
// grabbing one sample
m_pGrabber->SetOneShot( FALSE );
//m_pGrabber->SetOneShot( TRUE );

// set the callback, so we can grab the one sample
// 0 = Use the SampleCB callback method
// 1 = Use the BufferCB callback method
m_pGrabber->SetCallback( &mCB, 1 );
//m_pGrabber->SetCallback( &mCB, 0 );//maoguanli_test

// find the video window and stuff it in our window
//CComQIPtr< IVideoWindow, &IID_IVideoWindow > pWindow = m_pGraph;
CComQIPtr< IVideoWindow, &IID_IVideoWindow > pWindow(m_pGraph);

/*/这样在重新连接时会出问题
IVideoWindow *pWindow;
m_pGraph->QueryInterface(IID_IVideoWindow, (void **)&pWindow);
//*/

if( !pWindow )
{
Error( "错误(9):Could not get video window interface" );
return E_FAIL;
}


// set up the preview window to be in our dialog
// instead of floating popup
HWND hwndPreview = NULL;
//GetDlgItem( IDC_PREVIEW, &hwndPreview );
hwndPreview=VIDEOHANDLE;
RECT rc;
::GetWindowRect( hwndPreview, &rc );
pWindow->put_Owner( (long) hwndPreview );
pWindow->put_Left( 0 );
pWindow->put_Top( 0 );
pWindow->put_Width( rc.right - rc.left );
pWindow->put_Height( rc.bottom - rc.top );
pWindow->put_Visible( OATRUE );
pWindow->put_WindowStyle( WS_CHILD | WS_CLIPSIBLINGS );
#ifdef BUILDER_CAPTURE_DLL // 编译为 Dll
pWindow->put_MessageDrain((OAHWND)g_hCallDLLWnd);
#else//#ifdef BUILDER_CAPTURE_DLL
pWindow->put_MessageDrain((OAHWND)Handle);
#endif//#ifdef BUILDER_CAPTURE_DLL


/*#ifndef BUILDER_CAPTURE_DLL
BSTR bstrCaption;
WriteBSTR(&bstrCaption, L"VideoWnd");
pWindow->put_Caption(bstrCaption);
FreeBSTR(&bstrCaption);
#endif
*/
//pWindow->get_Caption(&vv);
// Add our graph to the running object table, which will allow
// the GraphEdit application to "spy" on our graph
#ifdef REGISTER_FILTERGRAPH
hr = AddGraphToRot(m_pGraph, &g_dwGraphRegister);
if (FAILED(hr))
{
Error(TEXT("错误(10):Failed to register filter graph with ROT!"));
g_dwGraphRegister = 0;
}
#endif

// run the graph
//
//CComQIPtr< IMediaControl, &IID_IMediaControl > pControl = m_pGraph;
CComQIPtr< IMediaControl, &IID_IMediaControl > pControl(m_pGraph);
/*
//这样在重新连接时会出问题
IMediaControl *pControl;
m_pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);
//*/
hr = pControl->Run();
if( FAILED( hr ) )
{
// 都是在这里运行出错, getLastError()=0
DWORD dwErr = GetLastError();
/* LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dwErr,
0, // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL
);
// ::MessageBox(NULL, (LPCTSTR)lpMsgBuf, "Information", MB_OK| MB_ICONINFORMATION);
ShowMessage((LPCTSTR)lpMsgBuf);
LocalFree(lpMsgBuf); */

// ShowMessage(IntToStr(hr)); // hr = 0xF33E41CF
Error( "错误(11):Could not run graph" );
return hr;
}

// UpdateStatus(_T("Previewing Live Video"));
return 0;
}

[rageliu]

返回错误值hr是什么？

[BenLeak]

还是没有明白究竟差了哪些程序没有安装
在家里的电脑 WinXP 是可以的

[rulera]

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