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Show warning when trying to save RGBA image as JPEG #2010
PNG have 16 base color formats. 6 of them fails PNG → JPEG conversation on master:
from PIL import Image for fn in glob('../i/basn*.png'): try: Image.open(fn).save(fn + '.jpg') except IOError: print '>>>', fn
We can leave the alpha channel discarding for now, but I afraid this means that we leave it forever.