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• Anomalie #1948 : Suppression documents attachés à des forums

  16 mars 2011, par cedric -

  il faut auparavant s’assurer que dans un message de forum ne provoque plus l’attachement automatique du doc23 sur le message !

• NV12 textures not working in DirectX 11.1

  28 mars 2017, par André Vitor

  I’m trying to render NV12 textures from frames decoded with ffmpeg 2.8.11 using DirectX 11.1 but when I do render them the texture is broken and the color is always off.

  Result is : http://imgur.com/a/YIVQk

  Code below is how I get the frame decoded by ffmpeg that is in YUV420P format and then I convert(not sure) to NV12 format by interleaving the U and V planes.

  static uint8_t *pixelsPtr_ = nullptr;
  
  
  
  UINT rowPitch = ((width + 1) >> 1) * 2;
  
  UINT imageSize = (rowPitch * height) + ((rowPitch * height + 1) >> 1);
  
  
  
  if (!pixelsPtr_)
  
  {
  
      pixelsPtr_ = new uint8_t[imageSize];
  
  }
  
  
  
  int j, position = 0;
  
  
  
  uint32_t pitchY = avFrame.linesize[0];
  
  uint32_t pitchU = avFrame.linesize[1];
  
  uint32_t pitchV = avFrame.linesize[2];
  
  
  
  uint8_t *avY = avFrame.data[0];
  
  uint8_t *avU = avFrame.data[1];
  
  uint8_t *avV = avFrame.data[2];
  
  
  
  ::SecureZeroMemory(pixelsPtr_, imageSize);
  
  
  
  for (j = 0; j < height; j++)
  
  {               
  
      ::CopyMemory(pixelsPtr_ + position, avY, (width));
  
      position += (width);
  
      avY += pitchY;
  
  }
  
  
  
  for (j = 0; j < height >> 1; j++)
  
  {
  
      ::CopyMemory(pixelsPtr_ + position, avU, (width >> 1));
  
      position += (width >> 1);
  
      avU += pitchU;
  
  
  
      ::CopyMemory(pixelsPtr_ + position, avV, (width >> 1));
  
      position += (width >> 1);
  
      avV += pitchV;
  
  }

  This is how I’m creating the Texture2D with the data I just got.

  // Create texture
  
  D3D11_TEXTURE2D_DESC desc;
  
  desc.Width = width;
  
  desc.Height = height;
  
  desc.MipLevels = 1;
  
  desc.ArraySize = 1;
  
  desc.Format = DXGI_FORMAT_NV12;
  
  desc.SampleDesc.Count = 1;
  
  desc.SampleDesc.Quality = 0;
  
  desc.Usage = D3D11_USAGE_DEFAULT;
  
  desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
  
  desc.CPUAccessFlags = 0;
  
  desc.MiscFlags = 0;
  
  
  
  D3D11_SUBRESOURCE_DATA initData;
  
  initData.pSysMem = pixelsPtr_;
  
  initData.SysMemPitch = rowPitch;
  
  
  
  ID3D11Texture2D* tex = nullptr;
  
  hr = d3dDevice->CreateTexture2D(&desc, &initData, &tex);
  
  if (SUCCEEDED(hr) && tex != 0)
  
  {
  
      D3D11_SHADER_RESOURCE_VIEW_DESC SRVDesc;
  
      memset(&SRVDesc, 0, sizeof(SRVDesc));
  
      SRVDesc.Format = DXGI_FORMAT_R8_UNORM;
  
      SRVDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
  
      SRVDesc.Texture2D.MipLevels = 1;
  
  
  
      hr = d3dDevice->CreateShaderResourceView(tex, &SRVDesc, &textureViewYUV[0]);
  
      if (FAILED(hr))
  
      {
  
          tex->Release();
  
          return hr;
  
      }
  
  
  
      SRVDesc.Format = DXGI_FORMAT_R8G8_UNORM;
  
  
  
      hr = d3dDevice->CreateShaderResourceView(tex, &SRVDesc, &textureViewYUV[1]);
  
      if (FAILED(hr))
  
      {
  
          tex->Release();
  
          return hr;
  
      }
  
  
  
      tex->Release();
  
  }

  Then I pass both Shader Resource View to Pixel Shader

  graphics->Context()->PSSetShaderResources(0, 2, textureViewYUV);

  This is the pixel shader :

  struct PixelShaderInput
  
  {
  
      float4 pos         : SV_POSITION;
  
      float4 Color       : COLOR;
  
      float2 texCoord    : TEXCOORD;
  
  };
  
  
  
  static const float3x3 YUVtoRGBCoeffMatrix =
  
  {
  
      1.164383f,  1.164383f, 1.164383f,
  
      0.000000f, -0.391762f, 2.017232f,
  
      1.596027f, -0.812968f, 0.000000f
  
  };
  
  
  
  Texture2D<float>  luminanceChannel;
  
  Texture2D<float2> chrominanceChannel;
  
  
  
  SamplerState linearfilter
  
  {
  
      Filter = MIN_MAG_MIP_LINEAR;
  
  };
  
  
  
  float3 ConvertYUVtoRGB(float3 yuv)
  
  {
  
      // Derived from https://msdn.microsoft.com/en-us/library/windows/desktop/dd206750(v=vs.85).aspx
  
      // Section: Converting 8-bit YUV to RGB888
  
  
  
      // These values are calculated from (16 / 255) and (128 / 255)
  
      yuv -= float3(0.062745f, 0.501960f, 0.501960f);
  
      yuv = mul(yuv, YUVtoRGBCoeffMatrix);
  
  
  
      return saturate(yuv);
  
  }
  
  
  
  float4 main(PixelShaderInput input) : SV_TARGET
  
  {
  
      float y = luminanceChannel.Sample(linearfilter, input.texCoord);
  
      float2 uv = chrominanceChannel.Sample(linearfilter, input.texCoord);
  
  
  
      float3 YUV = float3(y, uv.x, uv.y);
  
      float4 YUV4 = float4(YUV.x, YUV.y, YUV.z, 1);
  
  
  
      float3 RGB = ConvertYUVtoRGB(YUV);
  
      float4 RGB4 = float4(RGB.x, RGB.y, RGB.z, 1);
  
  
  
      return RGB4;
  
  }
  
  </float2></float>

  Can someone help me ? What I’m doing wrong ?

  EDIT #1

  int skipLineArea = 0;
  
  int uvCount = (height >> 1) * (width >> 1);
  
  
  
  for (j = 0, k = 0; j < uvCount; j++, k++)
  
  {
  
      if (skipLineArea == (width >> 1))
  
      {
  
          k += pitchU - (width >> 1);
  
          skipLineArea = 0;
  
      }
  
  
  
      pixelsPtr_[position++] = avU[k];
  
      pixelsPtr_[position++] = avV[k];
  
      skipLineArea++;
  
  }

  EDIT #2

  Updating the texture instead of creating new ones

  D3D11_MAPPED_SUBRESOURCE mappedResource;
  
  d3dContext->Map(tex, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
  
  
  
  uint8_t* mappedData = reinterpret_cast(mappedResource.pData);
  
  
  
  for (UINT i = 0; i < height * 1.5; ++i)
  
  {
  
      memcpy(mappedData, frameData, rowPitch);
  
      mappedData += mappedResource.RowPitch;
  
      frameData += rowPitch;
  
  }
  
  
  
  d3dContext->Unmap(tex, 0);

• create Accord.Video.FFMPEG object intial error

  14 mars 2018, par lokcyi

  I create an project with C# Visual studio 2013 and reference Accord.Video.FFMPEG.dll.
  The Configure of projects Target Platforms is set to x86.
  It is ok while compileing.
  But,It would throw run time error when application running.
  The exception is below. showing =>This application cannot be run in 64-bits
  I have no idea what wrong with the error ?

  ---

  System.TypeInitializationException   IsTransient=false
  
    Message='<module>' 的型別初始設定式發生例外狀況。
  
    Source=VideoMarkerAccord
  
    TypeName=<module>
  
    StackTrace:
  
         於 VideoMarker.Form1.test()
  
         於 VideoMarker.Form1.ConvertVedio(Int32 iFps, Int32 bitrate, Int32 width, Int32 height, Int32 iSpeed, String sOutputPath, String xml, String sVCode) 於 d:\Projects\AForge\VideoMarkerAccord\VideoMarker\Form1.cs: 行 201
  
         於 VideoMarker.Form1.btnConvertVedio_Click(Object sender, EventArgs e) 於 d:\Projects\AForge\VideoMarkerAccord\VideoMarker\Form1.cs: 行 181
  
         於 System.Windows.Forms.Control.OnClick(EventArgs e)
  
         於 System.Windows.Forms.Button.OnClick(EventArgs e)
  
         於 System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
  
         於 System.Windows.Forms.Control.WmMouseUp(Message&amp; m, MouseButtons button, Int32 clicks)
  
         於 System.Windows.Forms.Control.WndProc(Message&amp; m)
  
         於 System.Windows.Forms.ButtonBase.WndProc(Message&amp; m)
  
         於 System.Windows.Forms.Button.WndProc(Message&amp; m)
  
         於 System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message&amp; m)
  
         於 System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message&amp; m)
  
         於 System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
  
         於 System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG&amp; msg)
  
         於 System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
  
         於 System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
  
         於 System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
  
         於 System.Windows.Forms.Application.Run(Form mainForm)
  
         於 VideoMarker.Program.Main() 於 d:\Projects\AForge\VideoMarkerAccord\VideoMarker\Program.cs: 行 18
  
         於 System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
  
         於 System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
  
         於 System.Runtime.Hosting.ManifestRunner.Run(Boolean checkAptModel)
  
         於 System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly()
  
         於 System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)
  
         於 System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext)
  
         於 System.Activator.CreateInstance(ActivationContext activationContext)
  
         於 Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()
  
         於 System.Threading.ThreadHelper.ThreadStart_Context(Object state)
  
         於 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
  
         於 System.Threading.ThreadHelper.ThreadStart()
  
    InnerException: <crtimplementationdetails>.ModuleLoadException
  
         _HResult=-2146233088
  
         _message=The C++ module failed to load during process initialization.
  
  
  
         IsTransient=false
  
         Message=The C++ module failed to load during process initialization.
  
  
  
         Source=msvcm90
  
         StackTrace:
  
              於 <crtimplementationdetails>.ThrowModuleLoadException(String errorMessage, Exception innerException)
  
              於 <crtimplementationdetails>.ThrowModuleLoadException(String , Exception )
  
              於 <crtimplementationdetails>.LanguageSupport.Initialize(LanguageSupport* )
  
              於 .cctor()
  
         InnerException: System.InvalidOperationException
  
              _HResult=-2146233079
  
              _message=This application cannot be run in 64-bits.
  
              IsTransient=false
  
              Message=This application cannot be run in 64-bits.
  
              Source=Accord.Video.FFMPEG
  
              StackTrace:
  
                   於 _init.{ctor}(_init* )
  
                   於 ?A0xbe509209.??__E?A0xbe509209@_initializer@@YMXXZ()
  
                   於 _initterm_m((fnptr)* pfbegin, (fnptr)* pfend)
  
                   於 <crtimplementationdetails>.LanguageSupport.InitializePerProcess(LanguageSupport* )
  
                   於 <crtimplementationdetails>.LanguageSupport._Initialize(LanguageSupport* )
  
                   於 <crtimplementationdetails>.LanguageSupport.Initialize(LanguageSupport* )
  
              InnerException: 
  
  </crtimplementationdetails></crtimplementationdetails></crtimplementationdetails></crtimplementationdetails></crtimplementationdetails></crtimplementationdetails></crtimplementationdetails></module></module>