0
我有兩個不同的網絡攝像頭連接到我的電腦,但在運行下面的代碼時選擇它們時遇到問題。我包含了所有初始化例程,並且capDlgVideoSource調用的最後一行僅導致一個網絡攝像頭的視頻源對話框出現,而不是我可以在其中進行選擇的列表。 OS是WinXP的SP3capDlgVideoSource多個網絡攝像頭的問題
//Create invisible window to hold the capture window.
hwnd = CreateWindowEx(0, _T("webcampcapwindow"), _T(""), 0, 0, 0, 1, 1, HWND_DESKTOP, NULL, GetModuleHandle(NULL), NULL);
if(!hwnd)
throw FatalException(_T("main Capture window create failed"), _T(__FILE__), __LINE__);
//Create capture window.
capHwnd = capCreateCaptureWindow(_T("webcampcapwindowchild"), WS_CHILD, 0, 0, 1, 1, hwnd, 1);
if(!capHwnd)
throw FatalException(_T("secondary Capture window create failed"), _T(__FILE__), __LINE__);
CAPDRIVERCAPS caps;
if(capDriverConnect(capHwnd, 0)) {
connectedtoWc = true;
break;
}
if (!connectedtoWc)
throw FatalException(_T("Could not connect to capture driver."), _T(__FILE__), __LINE__);
//Attach our callback to the capture window.
if(!capSetCallbackOnVideoStream(capHwnd, videoCallback))
throw FatalException(_T("Unable to Attach our callback to the capture window."), _T(__FILE__), __LINE__);
//Make sure we can access this object from the callback.
if(!capSetUserData(capHwnd, this))
throw FatalException(_T("Could not associate user data with capture."), _T(__FILE__), __LINE__);
//Check everything's initialised.
caps.fCaptureInitialized = false;
if(!capDriverGetCaps(capHwnd, &caps, sizeof(CAPDRIVERCAPS)))
throw FatalException(_T("Unable to get driver caps"), _T(__FILE__), __LINE__);
if(!caps.fCaptureInitialized)
throw FatalException(_T("Unable to initialize capture driver"), _T(__FILE__), __LINE__);
if (caps.fHasDlgVideoSource)
capDlgVideoSource(capHwnd);
我怎麼改,所以我可以選擇視頻源對話框中的攝像頭?目前它顯示第二個攝像頭屬性。