  
      def process(self):
          # Format action to match the method name
          self.args.action = self.args.action.replace('-', '_')
  
          # Instantiate input DataItem object
 
</s> remove     def extract(input_=None, output=None, fps=None, extract_ext=None,
 </s> add     def extract(input_=None, output=None, fps=None, extract_ext=None, start=None, duration=None,
        """ EFFMPEG Process """
        logger.debug("Running Effmpeg")
  
      def process(self):
        """ EFFMPEG Process """
        logger.debug("Running Effmpeg")
          # Format action to match the method name
          self.args.action = self.args.action.replace('-', '_')
  
          # Instantiate input DataItem object
keep add keep keep keep keep
 Fix duration for effmpeg extract 
tools/effmpeg.py