Error on RenderStream in Direcshow Capture

Question

I am making an Directshow Application to Capture MP4 video. I use below graph to do so. i create the require filters and connect them on graph , at end i do file writer operation and redder stream using pin as capture. that part of my code is as below. GUID guid; guid = MEDIASUBTYPE_x264; hr = gcap.pBuilder->SetOutputFileName(&guid, gcap.wszCaptureFile,                                       &g_mp4mux, &gcap.pSink); hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_CAPTURE,                                      &MEDIATYPE_Interleaved,                                      gcap.pVCap, pVcompFilter, NULL); if(hr != NOERROR) {     hr = gcap.pBuilder->RenderStream(&PIN_CATEGORY_CAPTURE,                                         &MEDIATYPE_Video,                                         gcap.pVCap, pVcompFilter, NULL);     if(hr != NOERROR)     {         ErrMsg(TEXT("Cannot render video capture stream"));         TearDownGraph();         return FALSE;     } } On above code g_mp4mux is GDCL MPEG-4 Muliplexrer filer PVcompFilter is x264vfw H.264/MPEG-4 AVC codec Filter when i run above code i get HR = E_INVALIDARG . no idea what is wrong in above code. Plz help. Thanks.

Answer 1

Meghana Ravani wrote:

>

>I am making an Directshow Application to Capture MP4 video. I use below

>graph to do so.

>

>

>i create the require filters and connect them on graph , at end i do

>file writer operation and redder stream using pin as capture. that

>part of my code is as below.

>

>GUID guid;

>guid = MEDIASUBTYPE_x264;

>

>hr = gcap.pBuilder->SetOutputFileName(&guid, gcap.wszCaptureFile,

>                                      &g_mp4mux, &gcap.pSink);

>...

>g_mp4mux is GDCL MPEG-4 Muliplexrer filer

 

That won't work.  Did you read the documentation for SetOutputFileName?  If

you specify a mediasubtype, it must be either MEDIASUBTYPE_Avi or

MEDIASUBTYPE_Asf.  The graph doesn't know how to handle MEDIASUBTYPE_x264.

 

What you should do here is pass the CLSID for the GDCL MPEG4 mux filter.

SetOutputFileName will then create the mux and return it to you in

g_mp4Mux.

--

Tim Roberts, [e-mail]

Providenza & Boekelheide, Inc.

 

---

Tim Roberts, VC++ MVP Providenza & Boekelheide, Inc.

Answer 2

Hi, @Tim Roberts.. Thanks for your reply.

I also tried by setting media subtype to  MEDIASUBTYPE_Avi , it is giving me HRESULT = 'E_INVALIDARG' .

i came to know from your post that SetOutputFileName should return me the mux filter , but where i should pass the CLSID of it , so it return me the GDLC Mux filter which i need.  i am new to directshow and vc++ code so forgive me if i asked stupid question .
I insert my code block for creating GDLC mux filter as below.and then pass it to SetOutputFileName method .

// Create instance of mp4mux
	IBaseFilter *g_mp4mux=NULL;
	hr = CoCreateInstance(CLSID_GDCLMp4Mux, NULL, CLSCTX_INPROC_SERVER,
							IID_IBaseFilter, ( void **) &g_mp4mux);

	if (FAILED(hr)){
		ErrMsg(TEXT("Cannot create MJpeg Decommpression Filter"));
		return FALSE;
	}

	// add mp4mux to graph
	gcap.pFg->AddFilter(g_mp4mux, L"Mux Filter");

Answer 3

Meghana Ravani wrote:

>

>i came to know from your post that SetOutputFileName should return me the mux

>filter , but where i should pass the CLSID of it , so it return me the GDLC

>Mux filter which i need.

 

Did you read the documentation at all?  The description of the pType

parameter says what you need to know.  You EITHER provide the GUID of the

media type you want, or the CLSID of the mux you want.

 

>I insert my code block for creating GDLC mux filter as below.and then pass it to SetOutputFileName method .

>// Create instance of mp4mux

>        IBaseFilter *g_mp4mux=NULL;

>        hr = CoCreateInstance(CLSID_GDCLMp4Mux, NULL, CLSCTX_INPROC_SERVER,

>                                                        IID_IBaseFilter, ( void **) &g_mp4mux);

>...

>        // add mp4mux to graph

>        gcap.pFg->AddFilter(g_mp4mux, L"Mux Filter");

 

Nope, skip ALL of that.

 

    ICaptureGraphBuilder2* pcgb;

    ...

    pcgb->SetOutputFileName(

        CLSID_GDCLMp4Mux, L"name.mp4", &g_mp4mux, NULL

    );

--

Tim Roberts, [e-mail]

Providenza & Boekelheide, Inc.

 

---

Tim Roberts, VC++ MVP Providenza & Boekelheide, Inc.