问Intel图形硬件H264 MFT ProcessInput调用在输入少量示例后失败，同样适用于Nvidia硬件MFT。

EN

void SetD3dManager() {

    HRESULT hr = S_OK;

    if (!deviceManager) {

        // Create device manager
        hr = MFCreateDXGIDeviceManager(&resetToken, &deviceManager);
    }

    if (SUCCEEDED(hr)) 
    {
        if (!pD3dDevice) {

            pD3dDevice = GetDeviceDirect3D(0);
        }
    }

    if (pD3dDevice) {

        // NOTE: Getting ready for multi-threaded operation
        const CComQIPtr<ID3D10Multithread> pMultithread = pD3dDevice;
        pMultithread->SetMultithreadProtected(TRUE);

        hr = deviceManager->ResetDevice(pD3dDevice, resetToken);
        CHECK_HR(_pTransform->ProcessMessage(MFT_MESSAGE_SET_D3D_MANAGER, reinterpret_cast<ULONG_PTR>(deviceManager.p)), "Failed to set device manager.");
    }
    else {
        cout << "Failed to get d3d device";
    }
}

CComPtr<ID3D11Device> GetDeviceDirect3D(UINT idxVideoAdapter)
{
    // Create DXGI factory:
    CComPtr<IDXGIFactory1> dxgiFactory;
    DXGI_ADAPTER_DESC1 dxgiAdapterDesc;

    // Direct3D feature level codes and names:

    struct KeyValPair { int code; const char* name; };

    const KeyValPair d3dFLevelNames[] =
    {
        KeyValPair{ D3D_FEATURE_LEVEL_9_1, "Direct3D 9.1" },
        KeyValPair{ D3D_FEATURE_LEVEL_9_2, "Direct3D 9.2" },
        KeyValPair{ D3D_FEATURE_LEVEL_9_3, "Direct3D 9.3" },
        KeyValPair{ D3D_FEATURE_LEVEL_10_0, "Direct3D 10.0" },
        KeyValPair{ D3D_FEATURE_LEVEL_10_1, "Direct3D 10.1" },
        KeyValPair{ D3D_FEATURE_LEVEL_11_0, "Direct3D 11.0" },
        KeyValPair{ D3D_FEATURE_LEVEL_11_1, "Direct3D 11.1" },
    };

    // Feature levels for Direct3D support
    const D3D_FEATURE_LEVEL d3dFeatureLevels[] =
    {
        D3D_FEATURE_LEVEL_11_1,
        D3D_FEATURE_LEVEL_11_0,
        D3D_FEATURE_LEVEL_10_1,
        D3D_FEATURE_LEVEL_10_0,
        D3D_FEATURE_LEVEL_9_3,
        D3D_FEATURE_LEVEL_9_2,
        D3D_FEATURE_LEVEL_9_1,
    };

    constexpr auto nFeatLevels = static_cast<UINT> ((sizeof d3dFeatureLevels) / sizeof(D3D_FEATURE_LEVEL));

    CComPtr<IDXGIAdapter1> dxgiAdapter;
    D3D_FEATURE_LEVEL featLevelCodeSuccess;
    CComPtr<ID3D11Device> d3dDx11Device;

    std::wstring_convert<std::codecvt_utf8<wchar_t>> transcoder;

    HRESULT hr = CreateDXGIFactory1(IID_PPV_ARGS(&dxgiFactory));
    CHECK_HR(hr, "Failed to create DXGI factory");

    // Get a video adapter:
    dxgiFactory->EnumAdapters1(idxVideoAdapter, &dxgiAdapter);

    // Get video adapter description:
    dxgiAdapter->GetDesc1(&dxgiAdapterDesc);

    CHECK_HR(hr, "Failed to retrieve DXGI video adapter description");

    std::cout << "Selected DXGI video adapter is \'"
        << transcoder.to_bytes(dxgiAdapterDesc.Description) << '\'' << std::endl;

    // Create Direct3D device:
    hr = D3D11CreateDevice(
        dxgiAdapter,
        D3D_DRIVER_TYPE_UNKNOWN,
        nullptr,
        (0 * D3D11_CREATE_DEVICE_SINGLETHREADED) | D3D11_CREATE_DEVICE_VIDEO_SUPPORT,
        d3dFeatureLevels,
        nFeatLevels,
        D3D11_SDK_VERSION,
        &d3dDx11Device,
        &featLevelCodeSuccess,
        nullptr
    );

    // Might have failed for lack of Direct3D 11.1 runtime:
    if (hr == E_INVALIDARG)
    {
        // Try again without Direct3D 11.1:
        hr = D3D11CreateDevice(
            dxgiAdapter,
            D3D_DRIVER_TYPE_UNKNOWN,
            nullptr,
            (0 * D3D11_CREATE_DEVICE_SINGLETHREADED) | D3D11_CREATE_DEVICE_VIDEO_SUPPORT,
            d3dFeatureLevels + 1,
            nFeatLevels - 1,
            D3D11_SDK_VERSION,
            &d3dDx11Device,
            &featLevelCodeSuccess,
            nullptr
        );
    }

    // Get name of Direct3D feature level that succeeded upon device creation:
    std::cout << "Hardware device supports " << std::find_if(
        d3dFLevelNames,
        d3dFLevelNames + nFeatLevels,
        [featLevelCodeSuccess](const KeyValPair& entry)
        {
            return entry.code == featLevelCodeSuccess;
        }
    )->name << std::endl;

done:

    return d3dDx11Device;
}

struct EncoderCallbacks : IMFAsyncCallback
{
    EncoderCallbacks(IMFTransform* encoder)
    {
        TickEvent = CreateEvent(0, FALSE, FALSE, 0);
        _pEncoder = encoder;
    }

    ~EncoderCallbacks()
    {
        eventGen = nullptr;
        CloseHandle(TickEvent);
    }

    bool Initialize() {

        _pEncoder->QueryInterface(IID_PPV_ARGS(&eventGen));

        if (eventGen) {

            eventGen->BeginGetEvent(this, 0);
            return true;
        }

        return false;
    }

    // dummy IUnknown impl
    virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject) override { return E_NOTIMPL; }
    virtual ULONG STDMETHODCALLTYPE AddRef(void) override { return 1; }
    virtual ULONG STDMETHODCALLTYPE Release(void) override { return 1; }

    virtual HRESULT STDMETHODCALLTYPE GetParameters(DWORD* pdwFlags, DWORD* pdwQueue) override
    {
        // we return immediately and don't do anything except signaling another thread
        *pdwFlags = MFASYNC_SIGNAL_CALLBACK;
        *pdwQueue = MFASYNC_CALLBACK_QUEUE_IO;
        return S_OK;
    }

    virtual HRESULT STDMETHODCALLTYPE Invoke(IMFAsyncResult* pAsyncResult) override
    {
        IMFMediaEvent* event = 0;
        eventGen->EndGetEvent(pAsyncResult, &event);
        if (event)
        {
            MediaEventType type;
            event->GetType(&type);
            switch (type)
            {
            case METransformNeedInput: InterlockedIncrement(&NeedsInput); break;
            case METransformHaveOutput: InterlockedIncrement(&HasOutput); break;
            }
            event->Release();
            SetEvent(TickEvent);
        }

        eventGen->BeginGetEvent(this, 0);
        return S_OK;
    }

    CComQIPtr<IMFMediaEventGenerator> eventGen = nullptr;
    HANDLE TickEvent;
    IMFTransform* _pEncoder = nullptr;

    unsigned int NeedsInput = 0;
    unsigned int HasOutput = 0;
};

bool GenerateSampleAsync() {

    DWORD processOutputStatus = 0;
    HRESULT mftProcessOutput = S_OK;
    bool frameSent = false;

    // Create sample
    CComPtr<IMFSample> currentVideoSample = nullptr;

    MFT_OUTPUT_STREAM_INFO StreamInfo;

    // wait for any callback to come in
    WaitForSingleObject(_pEventCallback->TickEvent, INFINITE);

    while (_pEventCallback->NeedsInput) {

        if (!currentVideoSample) {

            (pDesktopDuplication)->releaseBuffer();
            (pDesktopDuplication)->cleanUpCurrentFrameObjects();

            bool bTimeout = false;

            if (pDesktopDuplication->GetCurrentFrameAsVideoSample((void**)& currentVideoSample, waitTime, bTimeout, deviceRect, deviceRect.Width(), deviceRect.Height())) {

                prevVideoSample = currentVideoSample;
            }
            // Feed the previous sample to the encoder in case of no update in display
            else {
                currentVideoSample = prevVideoSample;
            }
        }

        if (currentVideoSample)
        {
            InterlockedDecrement(&_pEventCallback->NeedsInput);
            _frameCount++;

            CHECK_HR(currentVideoSample->SetSampleTime(mTimeStamp), "Error setting the video sample time.");
            CHECK_HR(currentVideoSample->SetSampleDuration(VIDEO_FRAME_DURATION), "Error getting video sample duration.");

            CHECK_HR(_pTransform->ProcessInput(inputStreamID, currentVideoSample, 0), "The resampler H264 ProcessInput call failed.");

            mTimeStamp += VIDEO_FRAME_DURATION;
        }
    }

    while (_pEventCallback->HasOutput) {

        CComPtr<IMFSample> mftOutSample = nullptr;
        CComPtr<IMFMediaBuffer> pOutMediaBuffer = nullptr;

        InterlockedDecrement(&_pEventCallback->HasOutput);

        CHECK_HR(_pTransform->GetOutputStreamInfo(outputStreamID, &StreamInfo), "Failed to get output stream info from H264 MFT.");

        CHECK_HR(MFCreateSample(&mftOutSample), "Failed to create MF sample.");
        CHECK_HR(MFCreateMemoryBuffer(StreamInfo.cbSize, &pOutMediaBuffer), "Failed to create memory buffer.");
        CHECK_HR(mftOutSample->AddBuffer(pOutMediaBuffer), "Failed to add sample to buffer.");

        MFT_OUTPUT_DATA_BUFFER _outputDataBuffer;
        memset(&_outputDataBuffer, 0, sizeof _outputDataBuffer);
        _outputDataBuffer.dwStreamID = outputStreamID;
        _outputDataBuffer.dwStatus = 0;
        _outputDataBuffer.pEvents = nullptr;
        _outputDataBuffer.pSample = mftOutSample;

        mftProcessOutput = _pTransform->ProcessOutput(0, 1, &_outputDataBuffer, &processOutputStatus);

        if (mftProcessOutput != MF_E_TRANSFORM_NEED_MORE_INPUT)
        {
            if (_outputDataBuffer.pSample) {

                CComPtr<IMFMediaBuffer> buf = NULL;
                DWORD bufLength;
                CHECK_HR(_outputDataBuffer.pSample->ConvertToContiguousBuffer(&buf), "ConvertToContiguousBuffer failed.");

                if (buf) {

                    CHECK_HR(buf->GetCurrentLength(&bufLength), "Get buffer length failed.");
                    BYTE* rawBuffer = NULL;

                    fFrameSize = bufLength;
                    fDurationInMicroseconds = 0;
                    gettimeofday(&fPresentationTime, NULL);

                    buf->Lock(&rawBuffer, NULL, NULL);
                    memmove(fTo, rawBuffer, fFrameSize > fMaxSize ? fMaxSize : fFrameSize);

                    bytesTransfered += bufLength;

                    FramedSource::afterGetting(this);

                    buf->Unlock();

                    frameSent = true;
                }
            }

            if (_outputDataBuffer.pEvents)
                _outputDataBuffer.pEvents->Release();
        }
        else if (MF_E_TRANSFORM_STREAM_CHANGE == mftProcessOutput) {

            // some encoders want to renegotiate the output format. 
            if (_outputDataBuffer.dwStatus & MFT_OUTPUT_DATA_BUFFER_FORMAT_CHANGE)
            {
                CComPtr<IMFMediaType> pNewOutputMediaType = nullptr;
                HRESULT res = _pTransform->GetOutputAvailableType(outputStreamID, 1, &pNewOutputMediaType);

                res = _pTransform->SetOutputType(0, pNewOutputMediaType, 0);//setting the type again
                CHECK_HR(res, "Failed to set output type during stream change");
            }
        }
        else {
            HandleFailure();
        }
    }

    return frameSent;
}

bool GetCurrentFrameAsVideoSample(void **videoSample, int waitTime, bool &isTimeout, CRect &deviceRect, int surfaceWidth, int surfaceHeight)
{

FRAME_DATA currentFrameData;

m_LastErrorCode = m_DuplicationManager.GetFrame(&currentFrameData, waitTime, &isTimeout);

if (!isTimeout && SUCCEEDED(m_LastErrorCode)) {

    m_CurrentFrameTexture = currentFrameData.Frame;

    if (!pDstTexture) {

        D3D11_TEXTURE2D_DESC desc;
        ZeroMemory(&desc, sizeof(D3D11_TEXTURE2D_DESC));

        desc.Format = DXGI_FORMAT_NV12;
        desc.Width = surfaceWidth;
        desc.Height = surfaceHeight;
        desc.MipLevels = 1;
        desc.ArraySize = 1;
        desc.SampleDesc.Count = 1;
        desc.CPUAccessFlags = 0;
        desc.Usage = D3D11_USAGE_DEFAULT;
        desc.BindFlags = D3D11_BIND_RENDER_TARGET;

        m_LastErrorCode = m_Id3d11Device->CreateTexture2D(&desc, NULL, &pDstTexture);
    }

    if (m_CurrentFrameTexture && pDstTexture) {

        // Copy diff area texels to new temp texture
        //m_Id3d11DeviceContext->CopySubresourceRegion(pNewTexture, D3D11CalcSubresource(0, 0, 1), 0, 0, 0, m_CurrentFrameTexture, 0, NULL);

        HRESULT hr = pColorConv->Convert(m_CurrentFrameTexture, pDstTexture);

        if (SUCCEEDED(hr)) { 

            CComPtr<IMFMediaBuffer> pMediaBuffer = nullptr;

            MFCreateDXGISurfaceBuffer(__uuidof(ID3D11Texture2D), pDstTexture, 0, FALSE, (IMFMediaBuffer**)&pMediaBuffer);

            if (pMediaBuffer) {

                CComPtr<IMF2DBuffer> p2DBuffer = NULL;
                DWORD length = 0;
                (((IMFMediaBuffer*)pMediaBuffer))->QueryInterface(__uuidof(IMF2DBuffer), reinterpret_cast<void**>(&p2DBuffer));
                p2DBuffer->GetContiguousLength(&length);
                (((IMFMediaBuffer*)pMediaBuffer))->SetCurrentLength(length);

                //MFCreateVideoSampleFromSurface(NULL, (IMFSample**)videoSample);
                MFCreateSample((IMFSample * *)videoSample);

                if (videoSample) {

                    (*((IMFSample **)videoSample))->AddBuffer((((IMFMediaBuffer*)pMediaBuffer)));
                }

                return true;
            }
        }
    }
}

return false;
}