IOError: cannot write mode RGBA as JPEG

[liuxue0905]

watermark is 'watermarks/mark.png', mark.png is same as sorl-watermark/tests

no matter my picture on web page is jpeg or png

Request Method: | GET
-- | --
http://localhost:8888/portal/records/
1.11.3
IOError
cannot write mode RGBA as JPEG
/usr/local/lib/python2.7/site-packages/PIL/JpegImagePlugin.py in _save, line 604
/usr/local/opt/python/bin/python2.7
2.7.13
['/Users/liuxue/PycharmProjects/GoldenTimes',  '/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',  '/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7',  '/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',  '/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',  '/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',  '/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',  '/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',  '/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',  '/usr/local/lib/python2.7/site-packages',  '/usr/local/lib/python2.7/site-packages/onvif-0.1.3-py2.7.egg',  '/usr/local/lib/python2.7/site-packages/WSDiscovery-0.2-py2.7.egg',  '/usr/local/Cellar/numpy/1.13.0/libexec/nose/lib/python2.7/site-packages']
Mon, 11 Sep 2017 01:23:11 +0000

[lampslave]

python-pillow/Pillow#2609

[liuxue0905]

Problem of Pillow 4.2

$ pip install "Pillow<4.2"

[liuxue0905]

I try sorl-watermark, i think it's better than django-watermark.

[killown]

not fixed yet?

[originell]

@killown what is your Pillow version?

[developer-mayuan]

I have the same error using Pillow 5.0

[originell]

Ah. I don't yet use Pillow 5 in any production environment. Sadly, I don't have time to look at this in the coming days. But I'll schedule some time next week.

[vbazhin]

Hi @originell :)
I'm here too, and possibly I'll have some time on Sunday to look at this, but not sure yet.

[originell]

@vbazhin Awesome! If you find the time test that, let me know. Otherwise I will just try to schedule an hour or so next week.

[vbazhin]

Hi @originell . I had a short time to investigate this tonight.
The tests pass on my end for py2.7+django1.10+Pillow5 and py3.4+django1.10+Pillow5.
I couldn't reproduce the problem so far.
Just a rough presumption: maybe, the behavior may vary depending on different libjpeg versions?

[originell]

Thanks for testing this! maybe! @developer-mayuan can you tell us which libjpeg version you are using?

[emacsway]

I've the same problem with Pillow==5.1.0

[emacsway]

there is a workaround biz-tek-dev@e587a61

[originell]

Good catch @emacsway .. @vbazhin do you have time to integrate this? BUT we shouldn't simply convert to RGB without first checking that we are processing an RGB image (JPG)

[emacsway]

BUT we shouldn't simply convert to RGB without first checking that we are processing an RGB image (JPG)

Oh, you are right, thanks.

[originell]

@emacsway I finally got around to take care of this ;-) see the mentioned commit. this should now be fixed.