連接IMPEG2DEMULTIPLEXER和ffdshow Directshow過濾器

本質上，我正在構建一個HDV捕獲圖。我在圖形生成器中運行圖形，並且運行良好。圖形生成器圖可以看到here。在代碼中，迄今爲止的圖應該是HDV Camera - > Demultiplexer - > FFDshow。但是我得到了一個VFW_E_NO_ACCEPTABLE_TYPES「這些引腳之間沒有公共媒體類型。」錯誤。我曾嘗試在mt結構中使用不同的子媒體類型，但沒有運氣。連接IMPEG2DEMULTIPLEXER和ffdshow Directshow過濾器

編輯澄清：錯誤是連接多路複用器和ffdshow解碼器。

相關的代碼（getPin枚舉在物體上的銷和返回名爲IPIN的LPCOLESTR）

HRESULT hr = S_OK; 

//graph builder 
CComPtr<ICaptureGraphBuilder2> pBuilder; 
hr = pBuilder.CoCreateInstance(CLSID_CaptureGraphBuilder2); 
CHECK_HR(hr, "Can't Create Capture Graph Builder"); 
hr = pBuilder->SetFiltergraph(pGraph); 

//add Canon XH A1S 
CComPtr<IBaseFilter> pCanonXHA1S = GetCaptureDevice(CLSID_VideoInputDeviceCategory, L"Canon XH A1S"); 
hr = pGraph->AddFilter(pCanonXHA1S, L"Canon XH A1S"); 
CHECK_HR(hr, "Can't add Canon XH A1 to Graph"); 

//add MPEG-2 Demultiplexer 
CComPtr<IBaseFilter> pMPEG2Demultiplexer; 
hr = pMPEG2Demultiplexer.CoCreateInstance(CLSID_MPEG2Demultiplexer); 
CHECK_HR(hr, "Can't create MPEG-2 Demultiplexer"); 
hr = pGraph->AddFilter(pMPEG2Demultiplexer, L"MPEG-2 Demultiplexer"); 
CHECK_HR(hr, "Can't add MPEG-2 Demultiplexer to graph"); 

//connect Canon XH A1S and MPEG-2 Demultiplexer 
hr = pGraph->ConnectDirect(GetPin(pCanonXHA1S, L"MPEG2TS Out"), GetPin(pMPEG2Demultiplexer, L"MPEG-2 Stream"), NULL); 
CHECK_HR(hr, "Can't connect Canon XH A1S and MPEG-2 Demultiplexer"); 

//This block configures the demultiplexer 
    IMpeg2Demultiplexer *pDemux;  
    IPin    *pDemuxPin; 
    IMPEG2PIDMap  *pPidMap; 
    AM_MEDIA_TYPE mt; 
    ZeroMemory(&mt, sizeof(AM_MEDIA_TYPE)); 
    mt.majortype = MEDIATYPE_Video; 

    pMPEG2Demultiplexer->QueryInterface(IID_IMpeg2Demultiplexer, (void**)&pDemux); 
    if(hrcheck(hr, "Can't find MPEG2 Demux interface")) 
     return E_FAIL; 

    hr = pDemux->CreateOutputPin(&mt, L"MPEG2 Out", &pDemuxPin); 
    if(hrcheck(hr, "Can't create Output Pin on MPEG2 Demux")) 
     return E_FAIL; 

    hr = pDemuxPin->QueryInterface(IID_IMPEG2PIDMap, (void**)&pPidMap); 
    if(hrcheck(hr, "Can't create PIDMap")) 
     return E_FAIL; 

    // Assign PID 0x31 to pin 0. Set the type to "PES payload." 
    ULONG Pid = 0x30; 
    hr = pPidMap->MapPID(1, &Pid, MEDIA_ELEMENTARY_STREAM); 
    if(hrcheck(hr, "Problem mapping PID pins")) 
     return E_FAIL; 

    CComPtr<IBaseFilter> pFFDshowVideoDecoder; 
    hr = pFFDshowVideoDecoder.CoCreateInstance(CLSID_FFDshowVideoDecoder); 
    CHECK_HR(hr, "Can't create ffdshow Video Decoder"); 
    hr = pGraph->AddFilter(pFFDshowVideoDecoder, L"ffdshow Video Decoder"); 
    CHECK_HR(hr, "ffdshow Video Decoder"); 

    hr = pGraph->ConnectDirect(pDemuxPin, GetPin(pFFDshowVideoDecoder, L"In"), &mt); 
    if(hrcheck(hr, "Problem with renderstream")) 
     return E_FAIL;

來源

2011-04-04 NotCoffeeTable

的問題被發現是在傳遞到上創建輸出引腳的AM_MEDIA_TYPE結構的聲明。我用的結構：

AM_MEDIA_TYPE mt; 
ZeroMemory(&mt, sizeof(AM_MEDIA_TYPE)); 
mt.majortype = MEDIATYPE_Video; 
mt.subtype = MEDIASUBTYPE_MPEG2_VIDEO; 
mt.formattype = FORMAT_MPEG2Video; 

mt.cbFormat = sizeof(MPEG2VIDEOINFO); 
mt.pbFormat = (BYTE*)CoTaskMemAlloc(mt.cbFormat); 
if (mt.pbFormat == NULL) 
{ 
} 
ZeroMemory(mt.pbFormat, mt.cbFormat); 

MPEG2VIDEOINFO *pMVIH = (MPEG2VIDEOINFO*)mt.pbFormat; 

RECT rcSrc = {0, 1080, 0, 1440};  // Source rectangle. 
pMVIH->hdr.rcSource = rcSrc; 
pMVIH->hdr.dwBitRate = 4000000;  // Bit rate. 
pMVIH->hdr.AvgTimePerFrame = 333667; // 29.97 fps. 
pMVIH->hdr.dwPictAspectRatioX = 16; // 4:3 aspect ratio. 
pMVIH->hdr.dwPictAspectRatioY = 9; 

pMVIH->dwLevel = AM_MPEG2Profile_Main; // MPEG-2 profile. 
pMVIH->dwProfile = AM_MPEG2Level_Main; // MPEG-2 level.

來源

2011-04-16 00:51:54 NotCoffeeTable

那麼最初有什麼問題呢？ – rogerdpack 2012-09-20 23:56:16

連接IMPEG2DEMULTIPLEXER和ffdshow Directshow過濾器

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