Error while converting webp image file to jpg in python

Question

I have written small program to convert webp to jpg in python

import imghdr
from PIL import Image

im = Image.open("unnamed.webp").convert("RGB")
im.save("test.jpg","jpeg")

when executing it gives me following error

No handlers could be found for logger "PIL.ImageFile"
Traceback (most recent call last):
  File "webptopng.py", line 3, in <module>
    im = Image.open("unnamed.webp").convert("RGB")
  File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 2286, in open
    % (filename if filename else fp))
IOError: cannot identify image file 'unnamed.webp'

I have installed pillow with webp capability. Here is my pillow installation output

--------------------------------------------------------------------
PIL SETUP SUMMARY
--------------------------------------------------------------------
version      Pillow 3.0.0
platform     linux2 2.7.3 (default, Jun 22 2015, 19:33:41)
             [GCC 4.6.3]
--------------------------------------------------------------------
--- TKINTER support available
--- JPEG support available
*** OPENJPEG (JPEG2000) support not available
--- ZLIB (PNG/ZIP) support available
*** LIBTIFF support not available
--- FREETYPE2 support available
*** LITTLECMS2 support not available
--- WEBP support available
*** WEBPMUX support not available
--------------------------------------------------------------------

Please help me how to proceed.

I've never used WebP, but your code _should_ work. Can you verify that "unnamed.webp" is actually a valid WebP file, eg using ImageMagick's `identify` or `convert` commands? — PM 2Ring, Oct 23 '15 at 07:00
Here is output of file command in linux `$ unnamed.webp: RIFF (little-endian) data` output of imagemagick `$ convert: no decode delegate for this image format 'unnamed.webp' @ error/constitute.c/ReadImage/532. convert: missing an image filename '/dev/null' @ error/convert.c/ConvertImageCommand/3011.` — Sandeep Kumar Singh, Oct 23 '15 at 07:12
Sorry, I should've mentioned that older versions of ImageMagick _may_ not have WebP surpport. All I can suggest is to do a hexdump to check that the first 12 bytes of the file match the header shown in the [WebP Wikipedia article](https://en.wikipedia.org/wiki/WebP#Technology). And maybe try to find some more WebP files to test. — PM 2Ring, Oct 23 '15 at 07:28

score 13 · Answer 1 · answered Oct 23 '15 at 08:32

13

I tested your code with a webp image and it works with Pillow 2.9:

$ wget https://www.gstatic.com/webp/gallery3/2_webp_a.webp
>>> from PIL import Image
>>> im = Image.open("2_webp_a.webp").convert("RGB")
>>> im.save("test.jpg","jpeg")

There's Pillow 3.0 issue #1474 related with your error.

Let's you try to downgrade Pillow from 3.0 to 2.9 and try again.

answered Oct 23 '15 at 08:32

Paolo Melchiorre

5,716
1
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1

Still not working with Pillow 2.9.0 getting the same error `$ pip freeze | grep -i Pillow Pillow==2.9.0` – Sandeep Kumar Singh Oct 23 '15 at 09:42
Did you tried with the same webp image and the same code I used ? with the same Pillow version ? Than I suggest you to open an issues on Pillow's [github page](https://github.com/python-pillow/Pillow/) – Paolo Melchiorre Oct 23 '15 at 10:10
Yes I have used same code and same file as mentioned by you – Sandeep Kumar Singh Oct 23 '15 at 11:04
@SandeepKumarSingh I saw your [issue](https://github.com/python-pillow/Pillow/issues/1502) on Pillow's github page, is the problem that you have an old webp library ? – Paolo Melchiorre Oct 23 '15 at 12:44

score 7 · Accepted Answer · answered Oct 26 '15 at 04:22

7

This issue has been resolve now. I have install latest libwebp library i,e libwebp-0.4.3 and reinstall pillow.

Here is github issue thread if some one face same issue.

answered Oct 26 '15 at 04:22

Sandeep Kumar Singh

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4
13

score 2 · Answer 3 · edited Jul 22 '20 at 14:50

2

Install webptools by pip install webptools and then:

from webptools import dwebp
print(dwebp("python_logo.webp","python_logo.jpg","-o"))

This library works bit slow but is easy to do your work.

edited Jul 22 '20 at 14:50

Majid Hajibaba

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answered Jul 22 '20 at 08:31

Prajot Kuvalekar

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score 0 · Answer 4 · answered Sep 23 '22 at 08:16

0

Load image with webp and proceed

from PIL import Image
import webp

im = webp.load_image('test.webp').convert('RGB')
im.save('test.jpg', 'jepg')

answered Sep 23 '22 at 08:16

Mr Gooseman

1

Error while converting webp image file to jpg in python

4 Answers4