Cannot open webp image: UnidentifiedImageError

[rgoubet]

On an Anaconda distribution, after installing the libwebp package and pillow, I cannot open a webp file (e.g. the test.webp file from the libwebp library).

In [1]: from PIL import Image

In [2]: img = Image.open('test.webp')
C:\Users\user\anaconda3\lib\site-packages\PIL\Image.py:2942: UserWarning: image file could not be identified because WEBP support not installed
  warnings.warn(message)
---------------------------------------------------------------------------
UnidentifiedImageError                    Traceback (most recent call last)
<ipython-input-2-79ee787a81b3> in <module>
----> 1 img = Image.open('test.webp')

~\anaconda3\lib\site-packages\PIL\Image.py in open(fp, mode, formats)
   2941     for message in accept_warnings:
   2942         warnings.warn(message)
-> 2943     raise UnidentifiedImageError(
   2944         "cannot identify image file %r" % (filename if filename else fp)
   2945     )

UnidentifiedImageError: cannot identify image file 'test.webp'

Looks like Pillow/libwebp aren't properly set up on the Anaconda packages. I also tried reinstalling pillow after libwebp, but that didn't help.

[jakirkham]

cc @sodre (in case this is of interest as well 🙂)

[rgoubet]

Still does not work on Windows