Convert frame with FFMPEG about win32capturesample HOT 4 CLOSED

auto surfaceTexture = GetDXGIInterfaceFromObject<ID3D11Texture2D>(frame.Surface());

void SimpleCapture::OnFrameArrived(winrt::Direct3D11CaptureFramePool const& sender, winrt::IInspectable const&)
{
        auto frame = sender.TryGetNextFrame();

        winrt::com_ptr<ID3D11Texture2D> backBuffer;
        winrt::check_hresult(m_swapChain->GetBuffer(0, winrt::guid_of<ID3D11Texture2D>(), backBuffer.put_void()));
        auto surfaceTexture = GetDXGIInterfaceFromObject<ID3D11Texture2D>(frame.Surface());

        /* Prepare for accessing data bits */
        // Get the device context
        ID3D11Device* d3dDevice;
        surfaceTexture->GetDevice(&d3dDevice);
        ID3D11DeviceContext* d3dContext;
        d3dDevice->GetImmediateContext(&d3dContext);

        // map the texture
        D3D11_MAPPED_SUBRESOURCE mapInfo;
        mapInfo.RowPitch;
        HRESULT hr = d3dContext->Map(
            surfaceTexture.get(),
            0,  // Subresource
            D3D11_MAP_READ,
            0,  // MapFlags
            &mapInfo);


        D3D11_TEXTURE2D_DESC desc;
        surfaceTexture->GetDesc(&desc);

        D3D11_TEXTURE2D_DESC desc2;
        desc2.Width = desc.Width;
        desc2.Height = desc.Height;
        desc2.MipLevels = desc.MipLevels;
        desc2.ArraySize = desc.ArraySize;
        desc2.Format = desc.Format;
        desc2.SampleDesc = desc.SampleDesc;
        desc2.Usage = D3D11_USAGE_STAGING;
        desc2.BindFlags = 0;
        desc2.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
        desc2.MiscFlags = 0;


        ID3D11Texture2D* stagingTexture = NULL;
        hr = d3dDevice->CreateTexture2D(&desc2, nullptr, &stagingTexture);
        if (FAILED(hr)) {
            // throw std::invalid_argument("received negative value");
            std::cout << "Failed to create staging texture";
        }

        // copy the texture to a staging resource
        d3dContext->CopyResource(stagingTexture, surfaceTexture.get());

        // now, map the staging resource
        hr = d3dContext->Map(stagingTexture, 0, D3D11_MAP_READ, 0, &mapInfo);

        if (FAILED(hr)) {
            // throw std::invalid_argument("received negative value");
            std::cout << "Failed to map staging texture";
        }

        // Frame data is here??
        mapInfo.pData;

}