Source code for

# Copyright 2021 Variscite LTD
# SPDX-License-Identifier: BSD-3-Clause

:platform: Unix/Yocto
:synopsis: Class to calculate framerate from videos and real time cameras devices.

.. moduleauthor:: Diego Dorta <>

import collections
from contextlib import contextmanager
from time import perf_counter

[docs]class Framerate: def __init__(self): """ Constructor method for the Framerate class. """ self.fps = 0 self.window = collections.deque(maxlen=30)
[docs] @contextmanager def fpsit(self): """ Calculates the frames per second and save it in the **fps** attribute. """ begin = perf_counter() try: yield finally: end = perf_counter() self.window.append(end - begin) self.fps = len(self.window) / sum(self.window)