code: public function perform( $src, $dst )
      {
          // fetch the input file locally
          $inClusterHandler = eZClusterFileHandler::instance( $src );
          $inClusterHandler->fetch();
  
          try {
              $this->converter->transform( 'transformation', $src, $dst );
          }
          catch ( Exception $e )
          {
              $inClusterHandler->deleteLocal();
              throw $e;
          }
  
          // store the output file to the cluster
          $outClusterHandler = eZClusterFileHandler::instance();
  
          // @todo Check if the local output file can be deleted at that stage. Theorically yes.
          $outClusterHandler->fileStore( $dst, 'image' );
          
          // fixing the file permissions
          eZImageHandler::changeFilePermissions( $dst );
      }
docs: Performs the ezcImageConverter transformation
  
  @param  string $src Source image
  @param  string $dst Destination image
  @return void