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Python: any library to convert large number of pictures animated gif?

+4 votes
1,719 views

I want to make an animated GIF from 3200+ png. I searched and found http://code.google.com/p/visvis/source/browse/#hg/vvmovie and I wrote:

allPic=glob.glob('*.png')
allPic.sort()
allPic=[Image.open(i) for i in allPic]
writeGif('lala3.gif',allPic, duration=0.5, dither=0)

However I got

 allPic=[Image.open(i) for i in allPic]
 File "e:prgpypython-2.7.3libsite-packagesPILImage.py", line 1952, in open
 fp = __builtin__.open(fp, "rb")
IOError: [Errno 24] Too many open files: 'out0572.png'

Is there other lib for py?

posted Nov 30, 2013 by Anderson

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1 Answer

+1 vote

Yes, trying to open 3200 files is likely to be a problem!

The question is, how can you load them into memory one by one, and keep closing them? I'm not very familiar with PIL, but a glance at the code suggests that the Image.open() calls will create, but possibly
not verify, the images. Does this work?

images = []
for pic in allPic:
 img = Image.open(pic)
 img.verify()
 images.append(img)
allPic = images

Use that instead of your list comprehension. In theory, at least, that should abandon the file objects (not explicitly closing them, alas, but abandoning them should result in them being closed in CPython), so
you ought to get them all opened and read.

Otherwise, someone with more knowledge of PIL may be able to help. According to the PIL docs, this list may be more focussed on what you're trying to do, so if you don't get a response here, try there:

answer Nov 30, 2013 by anonymous
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