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• Copy ffmpeg d3dva texture resource to shared rendering texture

  10 juin 2020, par Teamol

  I'm using ffmpeg to decode video via d3dva based on this example https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/hw_decode.c. I'm able to succesfully decode video. What I need to do next is to render decoded NV12 frame. I have created directx rendering texture based on this example https://github.com/balapradeepswork/D3D11NV12Rendering and set it as shared.

  



      D3D11_TEXTURE2D_DESC texDesc;
    texDesc.Format = DXGI_FORMAT_NV12;              // Pixel format
    texDesc.Width = width;                          // Width of the video frames
    texDesc.Height = height;                        // Height of the video frames
    texDesc.ArraySize = 1;                          // Number of textures in the array
    texDesc.MipLevels = 1;                          // Number of miplevels in each texture
    texDesc.BindFlags = D3D11_BIND_SHADER_RESOURCE; // We read from this texture in the shader
    texDesc.Usage = D3D11_USAGE_DEFAULT;
    texDesc.MiscFlags = D3D11_RESOURCE_MISC_SHARED;
    texDesc.CPUAccessFlags = 0;

    hr = device.CreateTexture2D(&texDesc, null, &nv12Texture);
    if (FAILED(hr))
    {
        error("Failed to create NV12 texture (hr: %s)", hr);
        return false;
    }

    // QI IDXGIResource interface to synchronized shared surface.
    IDXGIResource dxgiResource;
    nv12Texture.QueryInterface(&IID_IDXGIResource, cast(void**)&dxgiResource);

    // obtain handle to IDXGIResource object.
    hr = dxgiResource.GetSharedHandle(&sharedHandle);
    dxgiResource.Release();
    dxgiResource = null;

    if (FAILED(hr))
    {
        error("Failed to create NV12 texture shared handle (hr: %s)", hr);
        return false;
    }


  



  I'm then trying to copy nv12 from ffmpeg texture to my rendering texture. exactly as ffmpeg does in function d3d11va_transfer_data.

  



      ID3D11Texture2D hwTexture = cast(ID3D11Texture2D)frame.data[0];

    ID3D11Device hwDevice;
    hwTexture.GetDevice(&hwDevice);

    ID3D11DeviceContext hwDeviceCtx;
    hwDevice.GetImmediateContext(&hwDeviceCtx);

    ID3D11Texture2D sharedTexture;

    HRESULT hr = device.OpenSharedResource(sharedHandle, &IID_ID3D11Texture2D,cast(void**) &sharedTexture);
    if(FAILED(hr))
    {
        error("Failed to obtaion open shared resource.");
        return;
    }

    int index = cast(int)frame.data[1];
    hwDeviceCtx.CopySubresourceRegion(sharedTexture, 0, 0, 0, 0, hwTexture, index, null);


  



  But the rendering window is just green no error no FAILED hr result nothing. I'm able render frames when I'm using sw decoder I just create texture with D3D11_USAGE_DYNAMIC and D3D11_CPU_ACCESS_WRITE.

  



  Here us desc of each texture.

  



  hwTexture desc D3D11_TEXTURE2D_DESC(1280, 720, 1, 20, 103, DXGI_SAMPLE_DESC(1, 0), 0, 512, 0, 0)
nv12Texture desc D3D11_TEXTURE2D_DESC(1280, 720, 1, 1, 103, DXGI_SAMPLE_DESC(1, 0), 0, 8, 0, 2)
sharedTexture desc D3D11_TEXTURE2D_DESC(1280, 720, 1, 1, 103, DXGI_SAMPLE_DESC(1, 0), 0, 8, 0, 2)


  



  Any idea what I'm missing ?

  


• what's the recommended CDN or Hosting should I use for online media converter app ? [on hold]

  20 novembre 2017, par Moe D.

  I’m working on web application that will let users download videos from facebook, twitter and vimeo as MP4 or MP3.

  I don’t know what’s the recommended CDN or Hosting plan or product I should use to can host all these big media files ( mp3 and mp4 ) with a lot of download requests per hour and to be affordable in the same time ?

  And will auto deleting files that older than 6 hours on the cloud save some cloud storage costs ?

• How do you display things in the rails console for the user in Rails ?

  30 décembre 2014, par Swaathi K

  I am using Streamio-ffmpeg to process files. The gem shows the progress of the transcoding in the console. I want to display this progress to the user. Is there anyway of doing this ?

  This is my helper : (Where the transcoding is done)

  if myfile.filetype == "video"
  
          movie = FFMPEG::Movie.new(oldpath(myfile))
  
          movie.transcode(newpath(myfile),"-deadline realtime -aq 10 -qmax 25") { |progress| puts progress }
  
  
  
          FileUtils.rm_rf(oldpath(myfile))

  The { |progress| puts progress } is responsible for printing the progress to the console. Can I display this in my views instead ?