Gif partially lose transparency / misalign, not on all frames #2239
Description
I'm building a script to extract a frame from a gif, and encountered a bug (I think).
The script is working properly with several gifs I've tried it on, but this specific gif I'm getting weird misalignments and transparency issues.
This is the original gif
And this is the output from frame 10:
This happens on almost every frame.
Here's the python code to extract the frame:
with open('loading.gif', "rb") as f:
gif_data = bytearray(f.read())
try:
# gif = Image.open(infile)
gif = Image.open(io.BytesIO(gif_data))
width, height = gif.size
except IOError as e:
print "Cant load", gif_data
sys.exit(1)
mypalette = gif.getpalette()
sprite = Image.new("RGBA", (width, height))
for i in range(10):
gif.seek(gif.tell() + 1)
gif.putpalette(mypalette)
sprite.paste(gif, (0, 0, width, height))
sprite_data = io.BytesIO()
sprite.save(sprite_data , format='PNG')
sprite_data = sprite_data.getvalue()
with open('sprite.png', 'wb') as f:
# png_base64 = (json.load(io.BytesIO(converted)))['file']
# png = base64.b64decode(png_base64)
f.write(sprite_data)
print "File written"