Store capture timestring in StreamObject metadata

        """Create a new StreamObject, to manage capture data."""

        # Store a nice ID

        self.id = uuid.uuid4().hex

        logging.info("Created StreamObject {}. keep_on_disk: {}, write_to_file: {}".format(self.id, keep_on_disk, write_to_file))

        logging.info("Created StreamObject {}".format(self.id))

        self.timestring = datetime.datetime.now().strftime("%Y-%m-%d_%H-%M-%S")

        # Store file format

        self.format = fmt

            'keep_on_disk': self.keep_on_disk,

            'filename': self.filename,

            'path': self.file,

            'time': self.timestring

        }

        # Check stream