AnimGif

[doublex]

Some AnimGifs are not transparent:

import PIL.Image
with PIL.Image.open('/tmp/AnimGif.gif', 'r') as image:
    for index, frame in enumerate(PIL.ImageSequence.Iterator(image)):
        #frame = frame.convert('RGBA')
        frame.save('/tmp/m/'+str(index)+'.png', 'PNG')

Image:

For example frame 6 and 19:

[radarhere]

Just a technical note - I don't see any "transparency" here, background color, or even disposal. The palette index of the (0, 0) pixel stays the same for each frame, so I would conclude this is our long-standing bug where multiple frames with different palettes are not processed correctly.

[radarhere]

I've created PR #5857 to resolve this.

Frame 6 and 19