def __next__(self):
        """
        gets the next clip in the room.
        """
        rfs = Raw_File.objects.filter(location=self.location,
                start__gt=self.start,
                ).order_by('start','id')
                # id__gt=self.id).order_by('start','id')
        if rfs:
            rf=rfs[0]
        else:
            rf=None

        return rf