Making a GIF using PIL/Pillow

Question

I am trying to use PIL/Pillow to covert a number of .png files into a gif. The following script is working but is adding the frames in random order.

from PIL import Image
import glob

# Create frames
frames = []
imgs = glob.glob("*.png")
for i in imgs:
    new_frame = Image.open(i)
    frames.append(new_frame)

# Save into a GIF file that loops forever
frames[0].save('globe.gif', format='GIF', 
               append_images=frames[0:], save_all=True, duration=1000, 
               loop=0, optimize=False, transparency=0)

I've tried renaming the files in order (1.png, 2.png, 3.png etc) but this hasn't worked

Any Ideas?

Answer 1

If you renamed your files starting with numbers, you could try to sort the imgs list. You might need to use a natural order though, depending on how you named your files.

Based on this answer :

import re

def natural_sort(l): 
    convert = lambda text: int(text) if text.isdigit() else text.lower() 
    alphanum_key = lambda key: [ convert(c) for c in re.split('([0-9]+)', key) ] 
    return sorted(l, key = alphanum_key)

And in your code :

# Create frames
frames = []
imgs = glob.glob("*.png")
imgs = natural_sort(imgs)
for i in imgs:
    new_frame = Image.open(i)
    frames.append(new_frame)