videonoise.py

#! /usr/bin/python3

import numpy as np
from numpy.random import rand
import matplotlib

matplotlib.use('Qt5Agg')
import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation

WIDTH, HEIGHT = 1200, 600

fig, ax = plt.subplots()

# the following lines are just for better look and not essential
ax.set_axis_off()
fig.set_facecolor('k')
fig.set_tight_layout({'pad': 0.0})

empty_screen = np.zeros((HEIGHT, WIDTH, 3))
screen = np.zeros((HEIGHT, WIDTH, 3))
img = ax.imshow(empty_screen)


def init():
    img.set_data(empty_screen)
    return (img,)


def update(frame):
    noise = rand(HEIGHT, WIDTH)
    for i in range(3):
        screen[:, :, i] = noise
    img.set_data(screen)
    return (img,)


# using `blit` or not shouldn't make much difference here
anim = FuncAnimation(fig, update, None, init, blit=True, interval=50)
plt.show()