[Image-SIG] IOError "decoder jpeg not available" on Win7 (2nd try)

Edward Cannon cannon.el at gmail.com
Fri Sep 24 20:00:11 CEST 2010

the only things I can think of is writing a script that opens a jpeg and 
trying that or maybe trying 1.1.6 instead of 1.1.7. I personally don't 
use the pilconvert script, that might be the problem
On 9/24/2010 7:44 AM, David wrote:
> On 9/8/2010 6:04 PM, Edward Cannon wrote:
>> That seems weird. I have win7 and python 2.6 and do not have any
>> problems. Maybe a clean install will help.
>> Edward Cannon
>> Unicorn School
>> On Sep 8, 2010, at 1:08 PM, David <lists at theflorys.org> wrote:
>>> I sent this to the list a week ago with no result. 2nd try.
>>> I am running Python 2.6 on a new Win7 machine. I have installed PIL
>>> from the PIL-1.1.7.win32-py2.6.exe binary. I am trying to resize a
>>> jpg. I get the IOError message "decoder jpeg not available" when I
>>> call the save() method:
>>> im = Image.open(infile)
>>> im = im.resize(newsize,Image.ANTIALIAS)
>>> im.save(outfile, "JPEG", quality=90)
>>> I have scanned a year of back messages on this list without seeing any
>>> relevant advice. I have used PIL with the same code on other Win32
>>> machines without problems. Since it is a prebuild binary, the jpeg
>>> decoder should be present.
>>> Help or advice would be appreciated.
>>> David Flory
>>> _______________________________________________
>>> Image-SIG maillist - Image-SIG at python.org
>>> http://mail.python.org/mailman/listinfo/image-sig
> I just did a clean install of PIL 1.1.7 from the Win32 binary. I still
> get an error message when I run pyconvert. Here is my command:
> C:\Users\David\Pictures\test>pilconvert test.jpg test.png
> cannot convert image (<type 'exceptions.IOError'>:decoder jpeg not
> available)
> What file contains the "decoder jpeg" and how might I find it?
> David

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