webp.WebPError: unsupported image mode: P

[Directory]

I have a simple gif. I split the gif into each frame in a list. Each frame being an image object opned ans saved as a png. The same error happens when saved as BMP however its slightly different for JPEG.

from PIL import Image
import webp
from io import BytesIO

img = Image.open('test.gif')
frames = []
pframes = []

for seek_point in range(img.n_frames):
    img.seek(seek_point)
    b = BytesIO()
    img.save(b, format='PNG')
    frames.append(b)

for f in frames:
    pframes.append(Image.open(f))

webp.save_images(pframes, 'test.webp', fps=24, lossless=True)

[anibali]

Please supply test.gif

[Directory]

its this. https://lukeroberts.tv/blog/wp-content/uploads/2019/05/gif1.gif. just downloaded and renamed.

[anibali]

OK thanks, I'll take a look when I get a chance.

[Directory]

additionally i encountered the exact same error but different traceback when using the advanced api.

the traceback for save_images is

Traceback (most recent call last):
  File "D:\Desktop\test.py", line 29, in <module>
    webp.save_images(pframes, 'test.webp', fps=24, lossless=True)
  File "D:\Program Files\Python38\lib\site-packages\webp\__init__.py", line 590, in save_images
    return mimwrite(file_path, arrs, **kwargs, pilmode=imgs[0].mode)
  File "D:\Program Files\Python38\lib\site-packages\webp\__init__.py", line 494, in mimwrite
    pics = [WebPPicture.from_numpy(arr, pilmode=pilmode) for arr in arrs]
  File "D:\Program Files\Python38\lib\site-packages\webp\__init__.py", line 494, in <listcomp>
    pics = [WebPPicture.from_numpy(arr, pilmode=pilmode) for arr in arrs]
  File "D:\Program Files\Python38\lib\site-packages\webp\__init__.py", line 223, in from_numpy
    raise WebPError('unsupported image mode: ' + pilmode)
webp.WebPError: unsupported image mode: P

however the traceback for the advanced api is

Traceback (most recent call last):
  File "D:\Desktop\test.py", line 32, in <module>
    pic = webp.WebPPicture.from_pil(img)
  File "D:\Program Files\Python38\lib\site-packages\webp\__init__.py", line 235, in from_pil
    return WebPPicture.from_numpy(np.asarray(img), pilmode=img.mode)
  File "D:\Program Files\Python38\lib\site-packages\webp\__init__.py", line 223, in from_numpy
    raise WebPError('unsupported image mode: ' + pilmode)
webp.WebPError: unsupported image mode: P

im on windows 10 and py3.8. Ive encountered the same error on ubuntu server 20.04. ive also tested it on this gif https://compote.slate.com/images/697b023b-64a5-49a0-8059-27b963453fb1.gif and the same error occurs on both systems.

[anibali]

If you want to try something out in the meantime, try converting the PIL images to RGB mode after you open them:

pframes.append(Image.open(f).convert('RGB'))

Use RGBA if you need transparency.

[Directory]

Oh wow that actually did work. Thanks. It should probably be specified in the documentation or internally automatically convert it but for my use this works. Thanks.

[anibali]

Automatic conversion added in dfea4995696ce7091ecc8b0cd9446d31211d1abd.