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• lavc/dxv : align to 4x4 blocks instead of 16x16

  9 février 2024, par Connor Worley

  lavc/dxv : align to 4x4 blocks instead of 16x16
  The previous assumption that DXV needs to be aligned to 16x16 was
  
  erroneous. 4x4 works just as well, and FATE decoder tests pass for all
  
  texture formats.
  On the encoder side, we should reject input that isn't 4x4 aligned,
  
  like the HAP encoder does, and stop aligning to 16x16. This both solves
  
  the uninitialized reads causing current FATE tests to fail and produces
  
  smaller encoded outputs.
  With regard to correctness, I've checked the decoding path by encoding a
  
  real-world sample with git master, and decoding it with
  
    ffmpeg -i dxt1-master.mov -c:v rawvideo -f framecrc -
  
  The results are exactly the same between master and this patch.
  On the encoding side, I've encoded a real-world sample with both master
  
  and this patch, and decoded both versions with
  
    ffmpeg -i dxt1-master,patch.mov -c:v rawvideo -f framecrc -
  
  Under this patch, results for both inputs are exactly the same.
  In other words, the extra padding gained by 16x16 alignment over 4x4
  
  alignment has no impact on decoded video.
  Signed-off-by : Connor Worley <connorbworley@gmail.com>
  
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavcodec/dxv.c
  • [DH] libavcodec/dxvenc.c
  • [DH] tests/ref/fate/dxv3enc-dxt1

• configure : Silence EMMS warnings in ICC

  16 mars 2015, par Michael Niedermayer

  configure : Silence EMMS warnings in ICC
  Real world MMX code does not put EMMS at the start and end of every function,
  
  it would be incredibly inefficient to do that
  
  thus do not warn about that
  Tested-by : Carl Eugen Hoyos <cehoyos@ag.or.at>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] configure

• Scalable Webinar Features Using Open-Source Tools ? [closed]

  31 janvier, par Firas Ben said

  I am searching for a scalable webinar solution that can handle 1000+ concurrent users. I have explored platforms like BigBlueButton but encountered limitations with scalability in real-world scenarios.

  


  My requirements include :

  


  

  • Support for RTMP and HLS streaming.

  


  • Chat and screen-sharing functionalities.

  


  • Ability to integrate with custom APIs.

  


  


  I’d like to know how to address these challenges using open-source tools. For instance :

  


  

  • What configurations are necessary to scale tools like BigBlueButton for large audiences ?

  


  • Are there specific architectural patterns or server setups recommended for handling this user load ?

  


  


  Any guidance or examples would be appreciated.