Hey Erich, Sorry, It took me sometime to get back to you on this. I needed to play with convert a bit to make sure I have the right answer.
> In PIL.Image.Image._new, which is what actually provides the new image when > convert() is called, a type 'P' Image object will be assigned a new color > palette. This color palette has no relation to the color palette of the > actual image. (I consider this to be a very serious bug in PIL). > I agree, those bugs are really annoying. > So what I do is get the palette from the converted image, and assign that > to the Image.palette.palette. > > > > Secondly, since the color palette is most likely different after hte > conversion, a simple index will not work. Instead save the transparent color > value by looking up the index for it in the original palette. When the new > palette is assigned, I then search for the transparent color value and save > the appropriate index in the info['transparency'] attribute. > I can see a possible issue here. The colors in the palette are not necessaryly unique. So it is possible to match the wrong index. In my opinion a simpler solution is to create the new image in mode 'RGBA' instead of 'RGB'. The GIF transparency will be kept this way. Then to convert from RGBA to P you can use the updated solution here: http://nadiana.com/pil-tips-converting-png-gif#Thesolution I updated the article with a much better solution. I discovered it today while playing with convert to find a solution for your issue. I'm glad to have you in our team :) Regards, Nadia
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