Converting PNG32 to PNG8 with PIL while preserving transparency

Question

I would like to convert a PNG32 image (with transparency) to PNG8 with Python Image Library. So far I have succeeded converting to PNG8 with a solid background.

Belo

Answer 1

As mentioned by Mark Ransom, your paletized image will only have one transparency level.

When saving your paletized image, you'll have to specify which color index you want to be the transparent color like this :

im.save("logo_py.png", transparency=0) 

to save the image as a paletized colors and using the first color as a transparent color.