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• How to disable switchable graphics ?

  20 juillet 2021, par Hab-Land0

  Recently, I've updated my graphic drivers for a new system I built, a mix between an amd apu and an nvidia quadro. But I stumbled upon a rare problem, every time I tried to use OpenCl acceleration on ffmpeg for libx264 encoding, ffmpeg notifies me with the next line :

  


  [libx264 @ 0000028149222780] OpenCL acceleration disabled, switchable graphics detected


  


  My obvious step was to search everything I could around this "switchable graphics", but almost all the tutorials on websites told me that I should search around the driver's settings, but literally either Radeon Software or Nvidia's control panel don't display any option about it (It is worth to say that almost all of the tutorials refer to laptops with dedicated graphics and were very outdated).

  


  Another way I use OpenCL is for vapoursynth's filters, such as KNLMeansCL. And, when I make use of this filter, task manager detects that both AMD's APU and Nvidia's gpu are being used simultaneously (I guess that's how the switchable graphics actually works).

  


  My main complain with this is that I attempt to use AMD as a display driver and let Nvidia do the hard work, and I actually was able to do that before updating my drivers. And, talking about the "updates" more in-depth, I updated nvidia's from "462.59" to "471.11" and, unfortunately, I can't remember what versions were my AMD drivers.

  


• FFMPEG-PHP converted videos don't work on mobiles

  16 avril 2018, par casusbelli

  I’m working on a upload script where users can upload videos however I’m having an issue with FFMPEG-PHP : The converted videos don’t work on mobiles while they are working fine on desktop.

  //FFMPEG Instance
  
  require_once '/root/vendor/autoload.php';
  
  $ffmpeg = FFMpeg\FFMpeg::create();
  
  $video = $ffmpeg->open($temp_path);
  
  
  
  //WEBM Convert
  
  $format_webm = new FFMpeg\Format\Video\WebM();
  
  $video->save($format_webm, 'video.webm');
  
  
  
  //MP4 Convert
  
  $format_mp4 = new FFMpeg\Format\Video\X264();
  
  $format_mp4->setAudioCodec("libmp3lame");
  
  $video->save($format_mp4, 'video.mp4');

  Fatal error : Uncaught
  Alchemy\BinaryDriver\Exception\ExecutionFailureException : ffmpeg
  failed to execute command ’/usr/bin/ffmpeg’ ’-y’ ’-i’
  ’/var/www/html/v/temp/13759.mp4’ ’-vcodec’ ’libx264’ ’-acodec’ ’aac’
  ’-b:v’ ’1000k’ ’-refs’ ’6’ ’-coder’ ’1’ ’-sc_threshold’ ’40’ ’-flags’
  ’+loop’ ’-me_range’ ’16’ ’-subq’ ’7’ ’-i_qfactor’ ’0.71’ ’-qcomp’
  ’0.6’ ’-qdiff’ ’4’ ’-trellis’ ’1’ ’-b:a’ ’128k’ ’-pass’ ’1’
  ’-passlogfile’
  ’/tmp/ffmpeg-passes5ad4e29d1b71e6oveh/pass-5ad4e29d1b7b2’
  ’/var/www/html/v/13759.mp4’ in
  /root/vendor/alchemy/binary-driver/src/Alchemy/BinaryDriver/ProcessRunner.php:100\nStack
  trace :\n#0
  /root/vendor/alchemy/binary-driver/src/Alchemy/BinaryDriver/ProcessRunner.php(72) :
  Alchemy\BinaryDriver\ProcessRunner->doExecutionFailure(’’/usr/bin/ffmpe...’)\n#1
  /root/vendor/alchemy/binary-driver/src/Alchemy/BinaryDriver/AbstractBinary.php(209) :
  Alchemy\BinaryDriver\ProcessRunner->run(Object(Symfony\Component\Process\Process),
  Object(SplObjectStorage), false) in
  /root/vendor/php-ffmpeg/php-ffmpeg/src/FFMpeg/Media/Video.php on line
  109

  Any help ?

• mmal : Reference MMAL VC lib explicitly

  13 avril 2015, par wm4

  mmal : Reference MMAL VC lib explicitly
  This is optional, but ensures that linking with -Wl,—as-needed does not
  
  drop the library containing the MMAL VC driver. The driver normally
  
  "registers" itself in the library constructor, but since no symbols are
  
  explicitly referenced, the linker could remove it with —as-needed
  
  enabled.
  Signed-off-by : Diego Biurrun <diego@biurrun.de>
  

  • [DBH] libavcodec/mmaldec.c