bewegung_demo.py

from bewegung import Video, FFmpegGifEncoder
from multiprocessing import cpu_count

from random import gauss

FRAMES = 300

def data(length, *args, **kwargs):
    state = 0
    for _ in range(length):
        state += gauss(*args, **kwargs)
        yield state

v = Video(
    width = 480, height = 270,
    frames = FRAMES, # video length in frames
    fps = 30, # set output to 30 fps
)

@v.sequence()
class SomeSequence:

    def __init__(self):
        self._x = list(data(FRAMES, mu = 0, sigma = 10))
        self._y = list(data(FRAMES, mu = 0, sigma = 10))

    @v.layer(canvas = v.canvas(backend = 'matplotlib', facecolor = '#FFFFFF', dpi = 150))
    def growing_sinwave(self, canvas, time):
        ax = canvas.subplots()
        ax.plot(self._x[:time.index+1], self._y[:time.index+1])
        ax.set_aspect('equal')
        return canvas

v.render(
    video_fn = 'test.gif',
    processes = cpu_count(), # render video frames in parallel
    encoder = FFmpegGifEncoder(), # export as gif file
)