pythonpngpython-imaging-libraryanimated-gif

Python: Converting GIF frames to PNG


I'm very new to python, trying to use it to split the frames of a GIF into PNG images.

# Using this GIF: http://www.videogamesprites.net/FinalFantasy1/Party/Before/Fighter-Front.gif

from PIL import Image

im = Image.open('Fighter-Front.gif')
transparency = im.info['transparency'] 
im.save('test1.png', transparency=transparency)

im.seek(im.tell()+1)
transparency = im.info['transparency'] 
im.save('test2.png', transparency=transparency)

# First frame comes out perfect, second frame (test2.png) comes out black,
# but in the "right shape", i.e. 
# https://i.sstatic.net/5GvzC.png

Is this specific to the image I'm working with or am I doing something wrong?

Thanks!


Solution

  • I don't think you're doing anything wrong. See a similar issue here: animated GIF problem. It appears as if the palette information isn't correctly treated for later frames. The following works for me:

    def iter_frames(im):
        try:
            i= 0
            while 1:
                im.seek(i)
                imframe = im.copy()
                if i == 0: 
                    palette = imframe.getpalette()
                else:
                    imframe.putpalette(palette)
                yield imframe
                i += 1
        except EOFError:
            pass
    
    for i, frame in enumerate(iter_frames(im)):
        frame.save('test%d.png' % i,**frame.info)