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• Revision bb214efcb9 : Update PATENTS to reflect s/VP8/WebM/g Sync with http://www.webmproject.org/lic

  11 août 2014, par Lou Quillio

  Changed Paths :
   Modify /PATENTS

  
   Modify /third_party/libwebm/PATENTS.TXT

  
  
  Update PATENTS to reflect s/VP8/WebM/g

  Sync with http://www.webmproject.org/license/additional/

  modified : PATENTS
  modified : third_party/libwebm/PATENTS.TXT

  Change-Id : I97fc588589654c83c6cb7e2e2b909f23a370db8a

• Added : Support for Chapter sub levels.

  5 octobre 2013, par Grandt

  Added : Support for Chapter sub levels.
  Rev. 2.53 - 2013-10-05
  
  * Added : Support for Chapter levels.
  
  * Added functions :
  
  *  ->subLevel() to indent one level under the current, additional
  
  chapters are added under that.
  
  *  ->backLevel() to step one level back to the parent of the current
  
  level.
  
  *  ->rootLevel() to step back to the root of the navMap.
  
  *  ->getCurrentLevel() to get the current level indentation (root = 1).
  
  *  ->setCurrentLevel(int) to set the current level indentation (1 or
  
  less returns to the root, same as ->rootLevel()).
  
  * ->buildTOC now reflects this level indentation if present.
  
  * ePub250 is otherwise compatible to the previous version, and no
  
  modifications are needed if you don't need this feature.
  

• ffmpeg command and args execute successfully with child_process.exec() but not child_process.spawn()

  15 octobre 2013, par Zugwalt

  I am trying to use ffmpeg to add text to a video via the drawtext filter from within node.js in a windows environment.

  I have a command and arguments that work in the command line and when executed using the child_process module's exec function, but it encounters an error when the same arguments are used with the spawn function.

  The below code illustrates the problem :

  var child_process = require('child_process');
  
  
  
  var cmd = 'ffmpeg';
  
  
  
  var args = [ '-i',
  
               'c:\\path\\to\\my\\inputfile.mp4',
  
               '-vf',
  
               'drawtext="fontfile=/Windows/Fonts/arial.ttf:text=\'Hello World\':fontcolor=white@0.6:fontsize=70:x=0:y=40"',
  
               '-y',
  
               'c:\\path\\to\\my\\outputfile.mp4' ];
  
  
  
  // Above creates the command line equivalent of:
  
  // ffmpeg -i c:\path\to\my\inputfile.mp4 -vf drawtext="fontfile=/Windows/Fonts/arial.ttf:text='Hello fluent text':fontcolor=white@0.7:fontsize=70:x=0:y=40" -y c:\path\to\my\outputfile.mp4
  
  // this works when run from the command line
  
  
  
  var execCmd = cmd+' '+args.join(' ');
  
  
  
  child_process.exec(execCmd, function (error, stdout, stderr) {
  
          /* ffmpeg runs fine, adding the text to the video */
  
  
  
          var spawn = child_process.spawn(cmd,args);
  
  
  
          spawn.on('close', function (code) {
  
              /* ffmpeg fails, with standard error (obtained via spawn.stderr) reading:
  
                 Could not load font ""fontfile=/Windows/Fonts/arial.ttf": impossible to find a matching font
  
                 Error initializing filter 'drawtext' with args '"fontfile=/Windows/Fonts/arial.ttf:text=Hello fluent text:fontcolor=white@0.6:fontsize=70:x=0:y=40"'
  
              */
  
          });
  
      });

  Based on the error message :

  Could not load font ""fontfile=/Windows/Fonts/arial.ttf" : impossible
  to find a matching font

  And comparing it to giving ffmpeg a bogus font on the command line :

  Could not load font "/Windows/Fonts/bogus.ttf" : impossible to find a
  matching font

  It seems the problem is that when executed from spawn the drawtext argument is incorrectly parsed and "fontfile= is incorrectly making its way into the font's path. This does not happen when the same argument is executed with exec or from the command line. Is there any additional escaping that needs to be done when executing using spawn ?