Extract frames from animated gif, every frame is not correct except the first frame when I save it to png file

[cflyt]

I want to extract frames from an animated gif image, and save every frame into png format, but i found the png is not correct in some area except the first frame.

   im = Image.open('earth.gif')
   try:
        while True:
            new_frame = im.convert('RGBA')
            new_frame.save('foo%02d.png' % im.tell(), 'PNG')
            im.seek(im.tell()+1)
    except EOFError:
        pass

This is origin image
earth.gif

This is the second frame which i use my program got.

And the second frame shoud be(correct one):

the different area(red mark) between them:

other frames has the same problem, is it a bug in GifImagePlugin.py?
Tell me what i should do ?

[radarhere]

While I can't say for certain, I suspect that this is related to #1525

[radarhere]

Is the animated GIF that you have provided one that could be used as a test image and subsequently released under Pillow's license?

[cflyt]

While I can't say for certain, I suspect that this is related to #1525

I use the patch you provided in #1525, it does't work。And it throws exception:

palette_bytes = im.im.getpalette("RGB")[:palette_byte_number]
ValueError: image has no palette

[cflyt]

The above GIF i used for testing is downloaded from:
https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Rotating_earth_%28large%29.gif/200px-Rotating_earth_%28large%29.gif

[radarhere]

Thanks for the link. The licensing for that file can be found at https://commons.wikimedia.org/wiki/File:Rotating_earth_(large).gif#Licensing

[ritu1337]

Try my answer to a similar issue here: http://stackoverflow.com/questions/35613716/imagemagick-pillow-generate-malformed-gif-frames/35615319#35615319

[radarhere]

I've created PR #5857 to resolve this.