How to save progressive jpeg using Python PIL 1.1.7?

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I'm trying to save with the following call and it raises error, but if i remove progressive and optimize options, it saves.

Here is my test.py that doesn't work:

import Image
img = Image.open("in.jpg")
img.save("out.jpg", "JPEG", quality=80, optimize=True, progressive=True)

It raises this error:

Suspension not allowed here
Traceback (most recent call last):
  File "test.py", line 3, in <module>
    img.save("out.jpg", "JPEG", quality=80, optimize=True, progressive=True)
  File "/Library/Python/2.6/site-packages/PIL/Image.py", line 1439, in save
    save_handler(self, fp, filename)
  File "/Library/Python/2.6/site-packages/PIL/JpegImagePlugin.py", line 471, in _save
    ImageFile._save(im, fp, [("jpeg", (0,0)+im.size, 0, rawmode)])
  File "/Library/Python/2.6/site-packages/PIL/ImageFile.py", line 501, in _save
    raise IOError("encoder error %d when writing image file" % s)
IOError: encoder error -2 when writing image file

Link to image: http://static.cafe.nov.ru/in.jpg (4.3 mb)

3 Answers
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