Before you can get output media type, you have to set input media type. I don't see you are doing this (SetInputType
is called with MFT_SET_TYPE_TEST_ONLY
).
GetOutputAvailableType() returns MF_E_TRANSFORM_TYPE_NOT_SET
-
14-01-2022 - |
Domanda
I am trying to decode h264 video from my camera I have configured the decoder as follows. I am not able to figure out why GetOutputAvailableType() function returns MF_E_TRANSFORM_TYPE_NOT_SET.I have also noticed that GetStreamIDs() returns E_NOTIMPL. I have checked in msdn it is given "MFT has a fixed number of streams, and \n the stream identifiers are consecutive starting from zero.".Can some body also explain what does this means?
HRESULT CH264_decodingDlg::ConfugureDecoder(IMFTransform *pDecoder)
{
HRESULT hr = S_OK;
IMFMediaType* pMediaTypeInput = NULL;
//Creating Input Media Type
hr = MFCreateMediaType(&pMediaTypeInput);
if (FAILED(hr)) return hr;
DWORD dwIn = 0,dwOut = 0;
hr = pDecoder->GetStreamCount(&dwIn,&dwOut);
if (FAILED(hr)) return hr;
if (dwIn)
{
DWORD dwInputID[2] ={0} ;
DWORD dwOutputID[2]= {0};
hr = pDecoder->GetStreamIDs(dwIn,dwInputID,dwOut,dwOutputID);
//if (FAILED(hr)) return hr;
GUID guidCurrent;
GUID guidMajor;
for (int i = 0; i< 8; i++)
{
hr = pDecoder->GetInputAvailableType(0,i,&pMediaTypeInput);
hr = pMediaTypeInput->GetGUID(MF_MT_MAJOR_TYPE, &guidMajor);
if (guidMajor == MFMediaType_Video) //safety check
{
if (hr == MF_E_NO_MORE_TYPES)
{
break;
}
hr = pMediaTypeInput->GetGUID( MF_MT_SUBTYPE, &guidCurrent );
if ( guidCurrent == MFVideoFormat_H264 ) //m_pVideoSubtype = MEDIASUBTYPE_WVC1
{
break;
}
}
}
// Set MF_MT_MAJOR_TYPE
hr = pMediaTypeInput->SetGUID(MF_MT_MAJOR_TYPE ,MFMediaType_Video);
if (FAILED(hr)) return hr;
// Set MF_MT_SUBTYPE
hr = pMediaTypeInput->SetGUID(MF_MT_SUBTYPE ,MFVideoFormat_H264);
if (FAILED(hr)) return hr;
// Set MF_MT_FRAME_RATE
UINT32 nNumerator = 30;
UINT32 nDenominator = 1;
hr = MFSetAttributeRatio(pMediaTypeInput,MF_MT_FRAME_RATE ,nNumerator,nDenominator);
if (FAILED(hr)) return hr;
// Set MF_MT_FRAME_SIZE
UINT32 nWidth = 640 ;
UINT32 nHeight = 480;
hr = MFSetAttributeSize(pMediaTypeInput, MF_MT_FRAME_SIZE, nWidth, nHeight);
if (FAILED(hr)) return hr;
// Set MF_MT_MPEG2_PROFILE
hr = pMediaTypeInput->SetUINT32(MF_MT_MPEG2_PROFILE, eAVEncH264VProfile_Base);
if (FAILED(hr)) return hr;
// Set MF_MT_INTERLACE_MODE
hr = pMediaTypeInput->SetUINT32(MF_MT_INTERLACE_MODE ,MFVideoInterlace_Progressive);
if (FAILED(hr)) return hr;
// Set MF_MT_PIXEL_ASPECT_RATIO
hr = MFSetAttributeRatio(pMediaTypeInput,MF_MT_PIXEL_ASPECT_RATIO,1,1);
if (FAILED(hr)) return hr;
//Set Input Media Type
hr = pDecoder->SetInputType(0,pMediaTypeInput,MFT_SET_TYPE_TEST_ONLY);
if (FAILED(hr)) return hr;
//Creating Output Media Type
IMFMediaType* pMediaTypeOutput = NULL;
hr = MFCreateMediaType(&pMediaTypeOutput);
if (FAILED(hr)) return hr;
hr = pDecoder->GetOutputAvailableType(0,0,&pMediaTypeOutput);
if (FAILED(hr)) return hr;`
Soluzione
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