C / C++ / MFC

• If pSource is a filter, the method searches for an output pin on that filter. In that case, use the pCategory and pType parameters to narrow the search. For example, if a filter has separate pins for preview and capture, you can specify either PIN_CATEGORY_CAPTURE or PIN_CATEGORY_PREVIEW. If pSource is an output pin, set the pCategory and pType to NULL.
• File Sources. You can use this method to transcode or recompress a file. The following discussion assumes that the file has at most one video stream and one audio stream, or else a single interleaved stream. Otherwise, the method will not work correctly. A file source has one output pin, so set pCategory and pType to NULL. Call the method twice — once to render the video stream, and once to render the audio stream. The first call connects the source filter to a parser filter and renders one of the parser filter's output pins. The second call renders the parser's remaining output pin. If you are compressing one stream but not the other, make sure to specify the compressor filter in the first call. The method will automatically pick the correct stream based on the compression type.

//Add video file filter
IBaseFilter *pSrcFilter = NULL;
hr = m_pGraph->AddSourceFilter(fileName, L"Source Filter", &pSrcFilter);
if (FAILED(hr))
        return -3;

//Add Sample Grabber filter
IBaseFilter* pGrabberFilter = NULL;
hr = AddSampleGrabber(&pGrabberFilter);
if (FAILED(hr)) {
        pSrcFilter->Release();
        return -4;
}

IBaseFilter* pNullFilter = NULL;
hr = AddNullRenderer(&pNullFilter);
if (FAILED(hr)) {
        pGrabberFilter->Release();
        pSrcFilter->Release();
        return -5;
}        

// Render the preview pin on the video file filter
hr = m_pCapture->RenderStream(NULL, NULL,
                                pSrcFilter, pGrabberFilter, pNullFilter);

IBaseFilter* pFilter;
hr = CoCreateInstance(CLSID_NullRenderer, NULL, CLSCTX_INPROC_SERVER,
                        IID_IBaseFilter, (void **)&pFilter);        
if (FAILED(hr))
        return hr;

*ppNullFilter = pFilter;

hr = m_pGraph->AddFilter(pFilter, L"Null Renderer");
if (FAILED(hr)) {
        pFilter->Release();                
        return hr;
}

(*ppNullFilter)->AddRef();
        pFilter->Release();

• General Graph-Building Techniques (Windows)[^]
• Find an Unconnected Pin on a Filter (Windows)[^]
• Connect Two Filters (Windows)[^]

RenderStream(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video, pSrcFilter, pGrabberFilter, pNullFilter);

Chesnokov Yuriy wrote:

If I set those parameters it returns 0x80070057

RenderStream(&PIN_CATEGORY_CAPTURE, &MEDIASUBTYPE_MPEG1Video, pSrcFilter, pGrabberFilter, pNullFilter);

paul_71 wrote:

While each C++ compiler must be able to process C-code and