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• Anomalie #2001 (Nouveau) : revisions_rubrique - pipeline ’post_edition’

  22 février 2011, par Julien Férard

  Sauf erreur de ma part... Localisation de l’anomalie¶ Dans le fichier spip/ecrire/action/editer_rubrique.php Dans la fonction revisions_rubriques A la ligne 124. Nature de l’anomalie¶ La variable $champs qui est appelée par le pipeline n’a pas été initialisée. Elle devrait être remplacée par la (...)

• avfilter : add a blend_vulkan filter

  31 décembre 2021, par Wu Jianhua

  avfilter : add a blend_vulkan filter
  This commit adds a blend_vulkan filter and a normal blend mode, and
  
  reserves support for introducing the blend modes in the future.
  Use the commands below to test : (href : https://trac.ffmpeg.org/wiki/Blend)
  
  I. make an image for test
  
  ffmpeg -f lavfi -i color=s=256x256,geq=r='H-1-Y':g='H-1-Y':b='H-1-Y' -frames 1 \
  
   y -pix_fmt yuv420p test.jpg
  II. blend in sw
  
  ffmpeg -i test.jpg -vf "split[a][b] ;[b]transpose[b] ;[a][b]blend=all_mode=normal,\
  
  pseudocolor=preset=turbo" -y normal_sw.jpg
  III. blend in vulkan
  
  ffmpeg -init_hw_device vulkan -i test.jpg -vf "split[a][b] ;[b]transpose[b] ;\
  
  [a]hwupload[a] ;[b]hwupload[b] ;[a][b]blend_vulkan=all_mode=normal,hwdownload,\
  
  format=yuv420p,pseudocolor=preset=turbo" -y normal_vulkan.jpg
  Signed-off-by : Wu Jianhua <jianhua.wu@intel.com>
  

  • [DH] configure
  • [DH] libavfilter/Makefile
  • [DH] libavfilter/allfilters.c
  • [DH] libavfilter/vf_blend_vulkan.c

• ffmpeg in AWS EBS Php Environment

  3 janvier 2018, par Shihas

  I did a project in Codeigniter framework and uploaded to AWS EBS Php environment.

  In the below function I’m trying to create a thumbnail for the uploading video using ffmpeg.

  function test()
  
  {
  
      if($_FILES['video']['name'])
  
      {
  
          $extension = pathinfo($_FILES['video']['name'], PATHINFO_EXTENSION);
  
  
  
          $video_file = 'vid_'.time().rand(0,10000000);
  
          $video_file_name = $video_file.'.'.$extension;
  
          $video_thumb = $video_file.'.png';
  
  
  
          $path = base_url('/assets/portfolio_video/').$video_file_name;
  
          move_uploaded_file($_FILES["video"]["tmp_name"],$path);
  
          echo shell_exec("/usr/bin/ffmpeg -i /home/ubuntu/project/assets/portfolio_video/$video_file_name -ss 00:00:02.000 -vframes 1 /home/ubuntu/project/assets/thumbnail/$video_thumb");
  
  
  
          echo "File Name: ".$video_file_name."";
  
          echo "<img src="http://stackoverflow.com/feeds/tag/&#034;.base_url(&#034;assets/thumbnail/&#034;).$video_thumb.&#034;" style='max-width: 300px; max-height: 300px' />";
  
      }else{
  
          $this->load->view('test');
  
      }
  
  }   

  Here the problem was the video file itself not uploading. I just want to know why its not uploading files in AWS. But it works fine in my local server.

  Now I try to create a thumbnail for the already existing video in the server.

  Path of video file : /home/ubuntu/123.mp4

  Code executed :

  function test()
  
  {
  
      echo shell_exec("/usr/bin/ffmpeg -i /home/ubuntu/123.mp4 -ss 00:00:02.000 -vframes 1 /home/ubuntu/thumbnail.png");
  
  }

  But still the thumbnail is not creating.

  NOTE : When I execute the terminal command ffmpeg -i /home/ubuntu/123.mp4 -ss 00:00:02.000 -vframes 1 /home/ubuntu/thumbnail.png directly in the AWS server terminal its create the thumbnail successfully.