protected function generateH264params($videoObject)
 {
     $h264params = null;
     $ffQsettings = " -qcomp 0.6 -qmin 10 -qmax 50 -qdiff 4";
     switch ($videoObject->_id) {
         case KDLVideoTarget::H264H:
             $h264params = " -subq 7" . $ffQsettings . " -bf 16 -coder 1 -refs 6 -x264opts b-pyramid:weightb:mixed-refs:8x8dct:no-fast-pskip=0";
             if ($videoObject->_bitRate < KDLConstants::LowBitrateThresHold) {
                 $h264params .= " -crf 30";
             }
             break;
         default:
             $h264params = parent::generateH264params($videoObject);
             break;
     }
     return $h264params;
 }