/**
  * 
  * Process the list of transcoders provided in config array. 
  * Transcoder objects to automatically register/unregister necessary alerts for.
  * @param string $sOperation - operation type.
  */
 protected function actionUnregisterTranscoders($sOperation)
 {
     if (empty($this->_aConfig['transcoders'])) {
         return BX_DOL_STUDIO_INSTALLER_FAILED;
     }
     BxDolTranscoderImage::unregisterHandlersArray($this->_aConfig['transcoders']);
     BxDolTranscoderImage::cleanupObjectsArray($this->_aConfig['transcoders']);
     return BX_DOL_STUDIO_INSTALLER_SUCCESS;
 }