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• Evolution #3012 (Nouveau) : Crawl-delay dans robots.txt

  3 juin 2013, par b b

  Dernièrement j’avais un site qui faisait monter énormément la charge serveur lors du passage du robot crawler de bing. Il y a pas mal d’articles sur le web qui causent du comportement "chelou" de ce bot et des problèmes de charge qu’il engendre. Perso, j’ai appliqué la règle suivante dans le robots.txt du site et depuis ce jour mon serveur ne se fait plus harceler par ce le bot de Bing (qui avant lançait jusqu’à 7requêtes/seconde) :

  1. calmer ce chacal de bingbot
  2. http://www.bing.com/blogs/site_blogs/b/webmaster/archive/2009/08/10/crawl-delay-and-the-bing-crawler-msnbot.aspx
     User-agent : bingbot
     Crawl-delay : 1

  http://www.lestaxinomes.org/robots.txt

  Cela serait peut être intéressant d’ajouter cette règle au robots.txt de SPIP ?

• FFMPEG running in Command Line but not PHP

  17 avril 2013, par Freeman

  I am using ffmpeg build for windows to make video thumbnails . The command works well in command line but not from PHP exec method. am using PHP 5.2.11

  Here is the command.

  "E:/Documents and Settings/x/WINDOWS/ffmpeg" -itsoffset -4 -v "E:/Program Files/Apache Software Foundation/Apache2.2/htdocs/bs/files/videogal/c08c3d20eeb9083ed033577bd154cba6.flv" -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 "E:/Program Files/Apache Software Foundation/Apache2.2/htdocs/bs/files/gallery/8ff43b72b932d2a34e7a6733672ad4d6.jpg" 2>&1

  Can somebody help. I checked the permissions they seem fine. GD is installed.

  The error msg is 'E:/Documents' is not recognized as an internal or external command, operable program or batch file

  Am using forward slashes in my paths except when escaping double quotes

  The PHP function

  function ExtractThumb($in, $out)
  
  {$path=dbconf::FFMPEG_PATH;
  
      $thumb_stdout;
  
      $errors;
  
      $retval = 0;
  
   echo $in;
  
      // Delete the file if it already exists
  
      if (file_exists($out)) { unlink($out); }
  
  
  
      // Use ffmpeg to generate a thumbnail from the movie
  
      $cmd = "$path -itsoffset -4 -i $in -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 $out 2>&1";
  
     echo $cmd;
  
  
  
     exec($cmd, $thumb_stdout, $retval);
  
  
  
      // Queue up the error for processing
  
      if ($retval != 0) { $errors[] = "FFMPEG thumbnail generation failed"; }
  
  
  
      if (!empty($thumb_stdout))
  
      {
  
          foreach ($thumb_stdout as $line)
  
          {
  
              echo $line . "\n";
  
          }
  
      }
  
  
  
      if (!empty($errors))
  
      {
  
          foreach ($errors as $error)
  
          {
  
              echo $error . "\n";
  
          }
  
      }
  
  }

  funny enough if I run without the $in and $out absolute path this is what I get

  Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --extra-cflags=-fno-common --enable-memalign-hack --enable-pthreads --enable-libmp3lame --enable-libxvid --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libfaac --enable-libgsm --enable-libx264 --enable-libschroedinger --enable-avisynth --enable-swscale --enable-gpl libavutil 49.12. 0 / 49.12. 0 libavcodec 52.10. 0 / 52.10. 0 libavformat 52.23. 1 / 52.23. 1 libavdevice 52. 1. 0 / 52. 1. 0 libswscale 0. 6. 1 / 0. 6. 1 built on Jan 13 2009 02:57:09, gcc: 4.2.4 822ae86a93810dade2843e822390d723.flv: no such file or directory

• Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height

  9 avril 2013, par Mahmoud Khafagy

  this is my command i exec() ffmpeg -i '1.mts' -deinterlace -ar 22050 -r 25 -qmin 3 -qmax 15 '1.flv' 2>&1

  and this is output

      Array
  
    (
  
      [0] => FFmpeg version SVN-r19795, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  
      [1] =>   configuration: --enable-libmp3lame --enable-libvorbis --disable-mmx --enable-shared --prefix=/usr/ --enable-gpl
  
      [2] =>   libavutil     50. 3. 0 / 50. 3. 0
  
      [3] =>   libavcodec    52.35. 0 / 52.35. 0
  
      [4] =>   libavformat   52.38. 0 / 52.38. 0
  
      [5] =>   libavdevice   52. 2. 0 / 52. 2. 0
  
      [6] =>   libswscale     0. 7. 1 /  0. 7. 1
  
      [7] =>   built on Nov 29 2012 01:11:06, gcc: 4.1.2 20080704 (Red Hat 4.1.2-52)
  
      [8] => Input #0, mpegts, from '/home/gezgin99/public_html/app/webroot/uploads/entry/wrF15QJP6qgpuFI83MO0_1365508699.mts':
  
      [9] =>   Duration: 00:00:07.81, start: 1.000067, bitrate: 21934 kb/s
  
      [10] =>   Program 1
  
      [11] =>     Stream #0.0[0x1011]: Video: h264, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 50 tbr, 90k tbn, 50 tbc
  
      [12] =>     Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, 5.1, s16, 448 kb/s
  
      [13] =>     Stream #0.2[0x1200]: Subtitle: pgssub
  
      [14] => Output #0, flv, to '/home/gezgin99/public_html/app/webroot/uploads/entry/6A6PwqRI2aEdDwg2eHnf_1365508699.flv':
  
      [15] =>     Stream #0.0: Video: flv, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], q=3-15, 200 kb/s, 90k tbn, 25 tbc
  
      [16] =>     Stream #0.1: Audio: libmp3lame, 22050 Hz, 5.1, s16, 64 kb/s
  
      [17] => Stream mapping:
  
      [18] =>   Stream #0.0 -> #0.0
  
      [19] =>   Stream #0.1 -> #0.1
  
      [20] => Error while opening encoder for output stream #0.1 - maybe incorrect parameters     such as bit_rate, rate, width or height
  
   )