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• ffmpeg Decode Hardware Accelerator concept and NVDEC, DXVA, VAAPI

  12 février 2019, par Hun

  I have video player using DX11, FFMPEG but It has so much CPU usage when H.264 4K 60FPS video play.
  So I try to hardware accelerated decode and search about this.
  But All I can get confused.
  According to this page.

  https://trac.ffmpeg.org/wiki/HWAccelIntro

  I can choose between DXVA2, VAAPI, and NVENC.
  But I do not know what is different.

  1. Can you explain the advantages and disadvantages of these ? (pros and cons)

  2. Is there a hardware acceleration method other than these ? ex) hardware

  acceleration of ffmpeg itself. Codeccontext->hwaccel//

  Thanks for reply

• Ubuntu ffmpeg command -i not found

  12 avril 2016, par Gerwin

  I’m a beginner with Ubuntu and I need to setup a streaming server for my company, I’ve installed NGINX and FFMPEG, but when I call ffmpeg -i in the ~/ffmpeg/ffmpeg directory it returns an error command not found but when I call ./ffmpeg -i it returns a list with configurations.. why does ffmpeg -i not work and how can I fix it ?

  I think that the Path Enviroment Variable is incorrect but how would I go abouts changing said variable ? I’m not that experienced with Ubuntu / CMD programming / FFMPEG configuration.

  Sources - https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu
  https://github.com/arut/nginx-rtmp-module/wiki/Control-module
  and http://docs.unified-streaming.com/tutorials/live/broadcast-247.html#continuous-timestamps

• Revision 70728 : Un chouilla de phpdoc et éviter une notice si $args[’contexte’][’modele’] ...

  14 mars 2013, par kent1@… — Log

  Un chouilla de phpdoc et éviter une notice si $argscontexte ?modele ? n’est pas défini