請問各位大大..    小弟現在用Direct Show做影像擷取卡的程式    先用direct X SDK提供的範例    可以compiler但Link時卻會發生Link Fatal Error:Expected a file name    請問是少了什麼東西嗎    以下是程式碼.. (應該是用VC寫的);        #include  #include #include #include #include "PlayCap.h" // An application can advertise the existence of its filter graph // by registering the graph with a global Running Object Table (ROT). // The GraphEdit application can detect and remotely view the running // filter graph, allowing you to 'spy' on the graph with GraphEdit. // // To enable registration in this sample, define REGISTER_FILTERGRAPH. // #define REGISTER_FILTERGRAPH // // Global data // HWND ghApp=0; DWORD g_dwGraphRegister=0; IVideoWindow *g_pVW = NULL; IMediaControl *g_pMC = NULL; IMediaEventEx *g_pME = NULL; IGraphBuilder *g_pGraph = NULL; ICaptureGraphBuilder2 * g_pCapture = NULL; PLAYSTATE g_psCurrent = Stopped; HRESULT CaptureVideo() { HRESULT hr; IBaseFilter *pSrcFilter=NULL; // Get DirectShow interfaces hr = GetInterfaces(); if (FAILED(hr)) { Msg(TEXT("Failed to get video interfaces! hr=0x%x"), hr); return hr; } // Attach the filter graph to the capture graph hr = g_pCapture->SetFiltergraph(g_pGraph); if (FAILED(hr)) { Msg(TEXT("Failed to set capture filter graph! hr=0x%x"), hr); return hr; } // Use the system device enumerator and class enumerator to find // a video capture/preview device, such as a desktop USB video camera. hr = FindCaptureDevice(&pSrcFilter); if (FAILED(hr)) { // Don't display a message because FindCaptureDevice will handle it return hr; } // Add Capture filter to our graph. hr = g_pGraph->AddFilter(pSrcFilter, L"Video Capture"); if (FAILED(hr)) { Msg(TEXT("Couldn't add the capture filter to the graph! hr=0x%x\r\n\r\n") TEXT("If you have a working video capture device, please make sure\r\n") TEXT("that it is connected and is not being used by another application.\r\n\r\n") TEXT("The sample will now close."), hr); pSrcFilter->Release(); return hr; } // Render the preview pin on the video capture filter // Use this instead of g_pGraph->RenderFile hr = g_pCapture->RenderStream (&PIN_CATEGORY_PREVIEW, &MEDIATYPE_Video, pSrcFilter, NULL, NULL); if (FAILED(hr)) { Msg(TEXT("Couldn't render the video capture stream. hr=0x%x\r\n") TEXT("The capture device may already be in use by another application.\r\n\r\n") TEXT("The sample will now close."), hr); pSrcFilter->Release(); return hr; } // Now that the filter has been added to the graph and we have // rendered its stream, we can release this reference to the filter. pSrcFilter->Release(); // Set video window style and position hr = SetupVideoWindow(); if (FAILED(hr)) { Msg(TEXT("Couldn't initialize video window! hr=0x%x"), hr); return hr; } #ifdef REGISTER_FILTERGRAPH // Add our graph to the running object table, which will allow // the GraphEdit application to "spy" on our graph hr = AddGraphToRot(g_pGraph, &g_dwGraphRegister); if (FAILED(hr)) { Msg(TEXT("Failed to register filter graph with ROT! hr=0x%x"), hr); g_dwGraphRegister = 0; } #endif // Start previewing video data hr = g_pMC->Run(); if (FAILED(hr)) { Msg(TEXT("Couldn't run the graph! hr=0x%x"), hr); return hr; } // Remember current state g_psCurrent = Running; return S_OK; } HRESULT FindCaptureDevice(IBaseFilter ** ppSrcFilter) { HRESULT hr; IBaseFilter * pSrc = NULL; CComPtr pMoniker =NULL; ULONG cFetched; if (!ppSrcFilter) return E_POINTER; // Create the system device enumerator CComPtr pDevEnum =NULL; hr = CoCreateInstance (CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC, IID_ICreateDevEnum, (void **) &pDevEnum); if (FAILED(hr)) { Msg(TEXT("Couldn't create system enumerator! hr=0x%x"), hr); return hr; } // Create an enumerator for the video capture devices CComPtr pClassEnum = NULL; hr = pDevEnum->CreateClassEnumerator (CLSID_VideoInputDeviceCategory, &pClassEnum, 0); if (FAILED(hr)) { Msg(TEXT("Couldn't create class enumerator! hr=0x%x"), hr); return hr; } // If there are no enumerators for the requested type, then // CreateClassEnumerator will succeed, but pClassEnum will be NULL. if (pClassEnum == NULL) { MessageBox(ghApp,TEXT("No video capture device was detected.\r\n\r\n") TEXT("This sample requires a video capture device, such as a USB WebCam,\r\n") TEXT("to be installed and working properly. The sample will now close."), TEXT("No Video Capture Hardware"), MB_OK | MB_ICONINFORMATION); return E_FAIL; } // Use the first video capture device on the device list. // Note that if the Next() call succeeds but there are no monikers, // it will return S_FALSE (which is not a failure). Therefore, we // check that the return code is S_OK instead of using SUCCEEDED() macro. if (S_OK == (pClassEnum->Next (1, &pMoniker, &cFetched))) { // Bind Moniker to a filter object hr = pMoniker->BindToObject(0,0,IID_IBaseFilter, (void**)&pSrc); if (FAILED(hr)) { Msg(TEXT("Couldn't bind moniker to filter object! hr=0x%x"), hr); return hr; } } else { Msg(TEXT("Unable to access video capture device!")); return E_FAIL; } // Copy the found filter pointer to the output parameter. // Do NOT Release() the reference, since it will still be used // by the calling function. *ppSrcFilter = pSrc; return hr; } HRESULT GetInterfaces(void) { HRESULT hr; // Create the filter graph hr = CoCreateInstance (CLSID_FilterGraph, NULL, CLSCTX_INPROC, IID_IGraphBuilder, (void **) &g_pGraph); if (FAILED(hr)) return hr; // Create the capture graph builder hr = CoCreateInstance (CLSID_CaptureGraphBuilder2 , NULL, CLSCTX_INPROC, IID_ICaptureGraphBuilder2, (void **) &g_pCapture); if (FAILED(hr)) return hr; // Obtain interfaces for media control and Video Window hr = g_pGraph->QueryInterface(IID_IMediaControl,(LPVOID *) &g_pMC); if (FAILED(hr)) return hr; hr = g_pGraph->QueryInterface(IID_IVideoWindow, (LPVOID *) &g_pVW); if (FAILED(hr)) return hr; hr = g_pGraph->QueryInterface(IID_IMediaEvent, (LPVOID *) &g_pME); if (FAILED(hr)) return hr; // Set the window handle used to process graph events hr = g_pME->SetNotifyWindow((OAHWND)ghApp, WM_GRAPHNOTIFY, 0); return hr; } void CloseInterfaces(void) { // Stop previewing data if (g_pMC) g_pMC->StopWhenReady(); g_psCurrent = Stopped; // Stop receiving events if (g_pME) g_pME->SetNotifyWindow(NULL, WM_GRAPHNOTIFY, 0); // Relinquish ownership (IMPORTANT!) of the video window. // Failing to call put_Owner can lead to assert failures within // the video renderer, as it still assumes that it has a valid // parent window. if(g_pVW) { g_pVW->put_Visible(OAFALSE); g_pVW->put_Owner(NULL); } #ifdef REGISTER_FILTERGRAPH // Remove filter graph from the running object table if (g_dwGraphRegister) RemoveGraphFromRot(g_dwGraphRegister); #endif // Release DirectShow interfaces SAFE_RELEASE(g_pMC); SAFE_RELEASE(g_pME); SAFE_RELEASE(g_pVW); SAFE_RELEASE(g_pGraph); SAFE_RELEASE(g_pCapture); } HRESULT SetupVideoWindow(void) { HRESULT hr; // Set the video window to be a child of the main window hr = g_pVW->put_Owner((OAHWND)ghApp); if (FAILED(hr)) return hr; // Set video window style hr = g_pVW->put_WindowStyle(WS_CHILD | WS_CLIPCHILDREN); if (FAILED(hr)) return hr; // Use helper function to position video window in client rect // of main application window ResizeVideoWindow(); // Make the video window visible, now that it is properly positioned hr = g_pVW->put_Visible(OATRUE); if (FAILED(hr)) return hr; return hr; } void ResizeVideoWindow(void) { // Resize the video preview window to match owner window size if (g_pVW) { RECT rc; // Make the preview video fill our window GetClientRect(ghApp, &rc); g_pVW->SetWindowPosition(0, 0, rc.right, rc.bottom); } } HRESULT ChangePreviewState(int nShow) { HRESULT hr=S_OK; // If the media control interface isn't ready, don't call it if (!g_pMC) return S_OK; if (nShow) { if (g_psCurrent != Running) { // Start previewing video data hr = g_pMC->Run(); g_psCurrent = Running; } } else { // Stop previewing video data hr = g_pMC->StopWhenReady(); g_psCurrent = Stopped; } return hr; } #ifdef REGISTER_FILTERGRAPH HRESULT AddGraphToRot(IUnknown *pUnkGraph, DWORD *pdwRegister) { IMoniker * pMoniker; IRunningObjectTable *pROT; WCHAR wsz[128]; HRESULT hr; if (!pUnkGraph || !pdwRegister) return E_POINTER; if (FAILED(GetRunningObjectTable(0, &pROT))) return E_FAIL; wsprintfW(wsz, L"FilterGraph x pid x\0", (DWORD_PTR)pUnkGraph, GetCurrentProcessId()); hr = CreateItemMoniker(L"!", wsz, &pMoniker); if (SUCCEEDED(hr)) { // Use the ROTFLAGS_REGISTRATIONKEEPSALIVE to ensure a strong reference // to the object. Using this flag will cause the object to remain // registered until it is explicitly revoked with the Revoke() method. // // Not using this flag means that if GraphEdit remotely connects // to this graph and then GraphEdit exits, this object registration // will be deleted, causing future attempts by GraphEdit to fail until // this application is restarted or until the graph is registered again. hr = pROT->Register(ROTFLAGS_REGISTRATIONKEEPSALIVE, pUnkGraph, pMoniker, pdwRegister); pMoniker->Release(); } pROT->Release(); return hr; } // Removes a filter graph from the Running Object Table void RemoveGraphFromRot(DWORD pdwRegister) { IRunningObjectTable *pROT; if (SUCCEEDED(GetRunningObjectTable(0, &pROT))) { pROT->Revoke(pdwRegister); pROT->Release(); } } #endif void Msg(TCHAR *szFormat, ...) { TCHAR szBuffer[1024]; // Large buffer for long filenames or URLs const size_t NUMCHARS = sizeof(szBuffer) / sizeof(szBuffer[0]); const int LASTCHAR = NUMCHARS - 1; // Format the input string va_list pArgs; va_start(pArgs, szFormat); // Use a bounded buffer size to prevent buffer overruns. Limit count to // character size minus one to allow for a NULL terminating character. _vsntprintf(szBuffer, NUMCHARS - 1, szFormat, pArgs); va_end(pArgs); // Ensure that the formatted string is NULL-terminated szBuffer[LASTCHAR] = TEXT('\0'); MessageBox(NULL, szBuffer, TEXT("PlayCap Message"), MB_OK | MB_ICONERROR); } HRESULT HandleGraphEvent(void) { LONG evCode, evParam1, evParam2; HRESULT hr=S_OK; if (!g_pME) return E_POINTER; while(SUCCEEDED(g_pME->GetEvent(&evCode, (LONG_PTR *) &evParam1, (LONG_PTR *) &evParam2, 0))) { // // Free event parameters to prevent memory leaks associated with // event parameter data. While this application is not interested // in the received events, applications should always process them. // hr = g_pME->FreeEventParams(evCode, evParam1, evParam2); // Insert event processing code here, if desired } return hr; } LRESULT CALLBACK WndMainProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { switch (message) { case WM_GRAPHNOTIFY: HandleGraphEvent(); break; case WM_SIZE: ResizeVideoWindow(); break; case WM_WINDOWPOSCHANGED: ChangePreviewState(! (IsIconic(hwnd))); break; case WM_CLOSE: // Hide the main window while the graph is destroyed ShowWindow(ghApp, SW_HIDE); CloseInterfaces(); // Stop capturing and release interfaces break; case WM_DESTROY: PostQuitMessage(0); return 0; } // Pass this message to the video window for notification of system changes if (g_pVW) g_pVW->NotifyOwnerMessage((LONG_PTR) hwnd, message, wParam, lParam); return DefWindowProc (hwnd , message, wParam, lParam); } int PASCAL WinMain(HINSTANCE hInstance, HINSTANCE hInstP,LPSTR lpCmdLine,int nCmdShow) { MSG msg={0}; WNDCLASS wc; // Initialize COM if(FAILED(CoInitializeEx(NULL, COINIT_APARTMENTTHREADED))) { Msg(TEXT("CoInitialize Failed!\r\n")); exit(1); } // Register the window class ZeroMemory(&wc, sizeof wc); wc.lpfnWndProc = WndMainProc; wc.hInstance = hInstance; wc.lpszClassName = CLASSNAME; wc.lpszMenuName = NULL; wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_VIDPREVIEW)); if(!RegisterClass(&wc)) { Msg(TEXT("RegisterClass Failed! Error=0x%x\r\n"), GetLastError()); CoUninitialize(); exit(1); } // // Initialize COM - requires paired un-initialize // //CoInitialize( NULL ); /* IBaseFilter *pCapFilterBt848 = NULL; HANDLE hKsDriver = NULL; pCapFilterBt848 = FindFilter( "Conexant Capture", CLSID_VideoInputDeviceCategory ); hKsDriver = KsGetHandle( pCapFilterBt848 ); if (hKsDriver) { //Do whatever you want with the Driver // For instance hr=I2CWrite(hKsDriver, 0x2A, buf, 3); } ReleaseFilter( pCapFilterBt848 ); // // Uninitialize COM - or pay // //CoUninitialize( ); */ // Create the main window. The WS_CLIPCHILDREN style is required. ghApp = CreateWindow(CLASSNAME, APPLICATIONNAME, WS_OVERLAPPEDWINDOW | WS_CAPTION | WS_CLIPCHILDREN, CW_USEDEFAULT, CW_USEDEFAULT, DEFAULT_VIDEO_WIDTH, DEFAULT_VIDEO_HEIGHT, 0, 0, hInstance, 0); if(ghApp) { HRESULT hr; // Create DirectShow graph and start capturing video hr = CaptureVideo(); if (FAILED (hr)) { CloseInterfaces(); DestroyWindow(ghApp); } else { // Don't display the main window until the DirectShow // preview graph has been created. Once video data is // being received and processed, the window will appear // and immediately have useful video data to display. // Otherwise, it will be black until video data arrives. ShowWindow(ghApp, nCmdShow); } // Main message loop while(GetMessage(&msg,NULL,0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); } } // Release COM CoUninitialize(); return (int) msg.wParam; } IBaseFilter *FindFilter( char * szFilterName, REFCLSID clsidDeviceClass) { HRESULT hr; UINT uIndex = 0; BOOL bMatchFound = FALSE; IBaseFilter *pBaseFilter; char achFriendlyName[120]; // // Create the system device enumerator. This will let you create // enumerators for specific filter classes. // ICreateDevEnum *pCreateDevEnum; hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, (void**)&pCreateDevEnum); if (FAILED(hr)) { //printf("%s(%d): HRESULT indicates failure\n", __FILE__, __LINE__); return NULL; } // // Create the filter class enumerator. We'll use it to find all filters // in the class "clsidDeviceClass" specified as a parameter. // IEnumMoniker *pEm; hr = pCreateDevEnum->CreateClassEnumerator( clsidDeviceClass, &pEm, 0 ); // // We don't need the device enumerator any more // pCreateDevEnum->Release(); if (FAILED(hr)) { //printf("%s(%d): HRESULT indicates failure\n", __FILE__, __LINE__); return NULL; } // // Reset the class enumerator so we can begin // pEm->Reset(); ULONG cFetched; IMoniker *pM; pBaseFilter = NULL; // // Loop through each of the filters that the class enumerator produces // and try to find the one whose name matches "szFilterName" // while( hr = pEm->Next(1, &pM, &cFetched), hr==S_OK) { // // Get the propery bag for the moniker that allows us to // check things like the filter's name. // IPropertyBag *pBag; achFriendlyName[0] = 0; // initialize the string to empty hr = pM->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pBag); // // If we were able to get the property bag, compare the names. // if(SUCCEEDED(hr)) { VARIANT var; var.vt = VT_BSTR; // // Look up the name for the filter // hr = pBag->Read(L"FriendlyName", &var, NULL); if (hr == NOERROR) { // // Convert the name to ASCII // WideCharToMultiByte(CP_ACP, 0, var.bstrVal, -1, achFriendlyName, 80, NULL, NULL); //printf("found %s\n", achFriendlyName); // // See if the names match // if ( strcmp ( achFriendlyName, szFilterName ) == 0 ) { //printf("*** matched [%s]\n", achFriendlyName); bMatchFound = TRUE; } // // We don't need the unicode string anymore // SysFreeString(var.bstrVal); } // // We're done with the property bag. // pBag->Release(); } if ( bMatchFound ) { hr = pM->BindToObject(0, 0, IID_IBaseFilter, (void**)&pBaseFilter); pM->Release(); break; } // // We haven't found a match yet. Release this moniker and have the // enumerator give us the next one. // pM->Release(); uIndex ; } // // We're done with the enumerator. // pEm->Release(); // // If we didn't find the filter, return NULL. // if (pBaseFilter == NULL) { //printf("Error %x: Cannot create video capture filter", hr); return NULL; } // // Ahhh. Success. // //printf("pBaseFilter = %x\n", pBaseFilter); return pBaseFilter; }

引言: 請問各位大大.. 小弟現在用Direct Show做影像擷取卡的程式 先用direct X SDK提供的範例 可以compiler但Link時卻會發生Link Fatal Error:Expected a file name 請問是少了什麼東西嗎 以下是程式碼.. (應該是用VC寫的);

paul67 你好: 參考看看是不是這個問題呢??

RaynorPao 兄 謝謝你.. 我會研究研究..