Python（诅咒）-如何减少刷新时的屏幕闪烁？

Question

我正在制作一个脚本，可以使用OpenCV和curses在命令行上播放视频。

from time import sleep
import curses
import numpy as np
import cv2 as cv

SOURCE_VIDEO = "foo.mp4"
DOWNSCALE_FACTOR = 8

def main(stdscr):
    curses.curs_set(0)
    curses.init_pair(1, curses.COLOR_WHITE, curses.COLOR_WHITE)

    cap = cv.VideoCapture(SOURCE_VIDEO)
    width = int(cap.get(cv.CAP_PROP_FRAME_WIDTH))
    height = int(cap.get(cv.CAP_PROP_FRAME_HEIGHT))
    fps = cap.get(cv.CAP_PROP_FPS)

    while cap.isOpened():
        # Read the next frame of the video.
        _, frame = cap.read()

        # Print the frame's ASCII approximation.
        for y in range(0, height, DOWNSCALE_FACTOR):
            for x in range(0, width, DOWNSCALE_FACTOR):
                px = np.mean(frame[y][x:x+DOWNSCALE_FACTOR], axis=(0, 1)).round()

                if px > 128:
                    stdscr.addstr("##", curses.color_pair(1))
                else:
                    stdscr.addstr("  ")

            stdscr.addstr("\n")

        # Move the cursor back to the top left corner and refresh the screen.
        stdscr.move(0, 0)
        stdscr.refresh()
        sleep(1 / fps) # I know this is a very imprecise method of timing the frames but it'll do for now.

    cap.release()
    cv2.destroyAllWindows()

if __name__ == "__main__":
    curses.wrapper(main)

这在大多数情况下效果很好，但是，只要有运动，屏幕上的部分就会非常明显地闪烁。我该如何避免/减少这种情况？

如果这有任何区别，我将Windows Terminal与Ubuntu 20.04 WSL一起使用。