如何使用Python PIL 1.1.7保存渐进式jpeg? [英] How to save progressive jpeg using Python PIL 1.1.7?

问题描述

我正在尝试通过以下调用进行保存，这会引发错误，但是如果我删除了渐进式和优化选项，则会保存.

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

这是我无法运行的test.py:

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)

它会引发此错误:

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

链接到图像: http://static.cafe.nov.ru/in.jpg (4.3 mb)

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

推荐答案

这可能会起作用，但是您可能需要使缓冲区更大:

Here's a hack that might work, but you may need to make the buffer even larger:

from PIL import Image, ImageFile

ImageFile.MAXBLOCK = 2**20

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

这篇关于如何使用Python PIL 1.1.7保存渐进式jpeg?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！