code: def framerate(self, framerate):
          
          # set the int_frame_rate
          if framerate == '29.97':
              self._int_framerate = 30
              self.drop_frame = True
          elif framerate == '59.94':
              self._int_framerate = 60
              self.drop_frame = True
          elif framerate == '23.98':
              self._int_framerate = 24
          elif framerate == 'ms':
              self._int_framerate = 1000
              framerate = 1000
          elif framerate == 'frames':
              self._int_framerate = 1
          else:
              self._int_framerate = int(framerate)
  
          self._framerate = framerate
docs: setter for the framerate attribute
          :param framerate:
          :return: