连接IMPEG2DEMULTIPLEXER和ffdshow Directshow过滤器

本质上，我正在构建一个HDV捕获图。我在图形生成器中运行图形，并且运行良好。图形生成器图可以看到here。在代码中，迄今为止的图应该是HDV Camera - > Demultiplexer - > FFDshow。但是我得到了一个VFW_E_NO_ACCEPTABLE_TYPES“这些引脚之间没有公共媒体类型。”错误。我曾尝试在mt结构中使用不同的子媒体类型，但没有运气。连接IMPEG2DEMULTIPLEXER和ffdshow Directshow过滤器

编辑澄清：错误是连接多路复用器和ffdshow解码器。

相关的代码（getPin枚举在物体上的销和返回名为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;

来源

2011-04-04 NotCoffeeTable

的问题被发现是在传递到上创建输出引脚的AM_MEDIA_TYPE结构的声明。我用的结构：

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.

来源

2011-04-16 00:51:54 NotCoffeeTable

那么最初有什么问题呢？ – rogerdpack 2012-09-20 23:56:16

连接IMPEG2DEMULTIPLEXER和ffdshow Directshow过滤器

回答

相关问题