在GIF上写文本打破了GIF文件

Question

我尝试将文本添加到GIF文件，但似乎搞砸了文件。当我现在打开它时，它看起来就像你在旧电视上发出白噪声时所得到的，但有些位仍显示原始GIF的一部分。有人可以帮我调试吗？

from PIL import Image
from PIL import ImageFont
from PIL import ImageDraw 
import numpy
import imageio

img = Image.open('test.gif')
sequence = []
frameNo = 0
while True:
  try:
    img.seek(frameNo)
  except EOFError:
    break

  newimg = Image.new("RGB", img.size)
  newimg.paste(img)

  draw = ImageDraw.Draw(newimg);

  draw = ImageDraw.Draw(newimg)
  # font = ImageFont.truetype(<font-file>, <font-size>)
  font = ImageFont.truetype("arial.ttf", 30
    )
  # draw.text((x, y),"Sample Text",(r,g,b))
  draw.text((0, 0),"Sample Text",(255,255,255),font=font)

  open_cv_image = numpy.array(newimg)
  sequence.append(open_cv_image)

  frameNo += 1

imageio.mimsave('temp.gif', sequence);