ICaptureGraphBuilder2 *pCaptureGraphBuilder2 error ?

[manzoor505]

i am writing a program to capture video from my webcam. every thing is fine except that the compiler gives error for ICaptureGraphBuilder2 *pCaptureGraphBuilder2.

error C2065: 'ICaptureGraphBuilder2' : undeclared identifier

i am using VC++ 6.0

[JohnnyMalaria]

More information please.

What SDKs do you have installed? You are probably missing strmif.h (or, if you have the right SDK, just haven't included it. Once you do, you'll probably get a whole load of missing symbol errors when linking, too).

Is that the only error you get?

Can you post your code and all the compiler output? It's hard to tell what's going wrong without it.

[manzoor505]

i have installed DirectMedia SDK 6.0

#include<stdio.h>
#include<dshow.h>
#include<strmif.h>



void main()

{


ULONG nFetched = 0;

IGraphBuilder *graphb;

ICaptureGraphBuilder2 *pCaptureGraphBuilder2;

IMediaControl *mediac;

ICreateDevEnum *listofdevices;

IEnumMoniker *devicecategory;

IMoniker *monik;

IPropertyBag *pPropertyBag;

IBaseFilter *filter;





CoInitialize(NULL);


CoCreateInstance(CLSID_FilterGraph,NULL,CLSCTX_INP ROC,IID_IGraphBuilder,(LPVOID*)&graphb);

CoCreateInstance(CLSID_CaptureGraphBuilder2,NULL,C LSCTX_INPROC,IID_ICaptureGraphBuilder,(LPVOID*)&pC aptureGraphBuilder2);


graphb->QueryInterface(IID_IMediaControl,(LPVOID*)&mediac );


CoCreateInstance(CLSID_SystemDeviceEnum,NULL,CLSCT X_INPROC,IID_ICreateDevEnum,(LPVOID*)&listofdevice s);


listofdevices->CreateClassEnumerator(CLSID_VideoInputDeviceCateg ory,&devicecategory,0);





while (devicecategory->Next(1, &monik, &nFetched) == S_OK)

{


TCHAR devname[128];


monik->BindToStorage(0, 0, IID_IPropertyBag,(void **)&pPropertyBag);


VARIANT varFriendlyName;

varFriendlyName.vt = VT_BSTR;


pPropertyBag->Read(L"FriendlyName", &varFriendlyName, 0);




#ifdef UNICODE

_tcscpy(devname, varFriendlyName.bstrVal);
#else

WideCharToMultiByte(CP_ACP, 0,varFriendlyName.bstrVal, -1, devname, sizeof(devname), 0, 0);
#endif

puts(devname);



VariantClear(&varFriendlyName);

monik->BindToObject(0, 0, IID_IBaseFilter,(void**)&filter);



monik->Release();
pPropertyBag->Release();

break;
}


pCaptureGraphBuilder2->SetFiltergraph(graphb);

graphb->AddFilter(filter, L"Device Filter");



pCaptureGraphBuilder2->RenderStream(&PIN_CATEGORY_PREVIEW,NULL, filter, NULL,NULL);





mediac->Run();


Sleep(100000000);





graphb->Release();
mediac->Release();


devicecategory->Release();
listofdevices->Release();

CoUninitialize();

}


errors :

error C2065: 'ICaptureGraphBuilder2' : undeclared identifier
error C2065: 'pCaptureGraphBuilder2' : undeclared identifier
error C2065: 'CLSID_CaptureGraphBuilder2' : undeclared identifier
error C2227: left of '->SetFiltergraph' must point to class/struct/union
error C2227: left of '->RenderStream' must point to class/struct/union
Error executing cl.exe.

[JohnnyMalaria]

Your SDK is out of date.

You need the current version of the DirectShow SDK. This is part of the latest Platform SDK or Windows SDK (they are different). Don't download the DirectX SDK - all the DirectShow stuff has been removed.

[manzoor505]

first of all thx for ur response.

i hve downloaded a new strmif.h from www.koders.com

the problem has solved but now it gives other errors

: error C2146: syntax error : missing ';' before identifier 'HSEMAPHORE'
: fatal error C1004: unexpected end of file found


when i click the errors it takes me to strmif.h file.

what is this ?

[JohnnyMalaria]

You need the current Windows Software Development Kit or Platform Software Development Kit. It contains everything that is required for DirectShow applications including lots of examples showing what libraries are needed etc. They come with Visual Studio solutions but they may not open in 6.0.

I recommend the Platform SDK:

http://www.microsoft.com/downloads/details.aspx?FamilyId=484269E2-3B89-47E3-8EB7-1F2BE...displaylang=en

It's big - 400MB but smaller than the other one (1.1GB).

Once installed, you will need to add the DirectShow base libraries and includes to your paths.

C:\Program Files\Microsoft Platform SDK for Windows Server 2003 R2\Samples\Multimedia\DirectShow\BaseClasses

[manzoor505]

the problem has solved.

thx for ur kind help.