Good script. Nice work. I suggest You to mention about python library requirements (import Image) is on some systems (e.g. debian) it’s installed by default with python interpreter.

I d/l the script, but it is not working out-of-the box. Belowe are my fixes [diff between Yours original and fixed working file]. Html escaping removed and the most important – fixed missing of first argument file.

Fixes:

35c35
if alpha <= threshold:
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usage = ‘png2gif [OPTIONS] ‘)
90c90
if options.verbose: print “Creating output directory”, options.outputdir
98c98
for i in range(0, len(arguments)):

It really helped me a lot.

I blogged about a nasty deadlock problem with the CSS alpha transparency filter hack at http://blogs.cozi.com/tech/2008/03/transparent-png.html