from PIL import Image, ImageSequence

def getframe(src, out):
    with Image.open(src) as img:
        print(f'file opened')
        i = 0
        for frame in ImageSequence.Iterator(img):
            if i == 1:
                frame.save(out)
                break
            else:
                i += 1

i used this method to get a 2nd frame of a gif image.
i got the frame but it was not good.
source gif:

result 2nd frame i got (gif format):

i tried to get 1st frame and 1st frame was very good unlike the 2nd.

i also tried another gif image has transparency.
i added convert function before save the frame

frame = frame.convert('RGB')

source gif:

result 2nd frame i got (jpg format):

i think the second case was occured since i did not set the background color. But there is no options about background of jpeg with Image.save().

There is some bug.. or something i missed.
Please let me know, thank you.

i used python 3.9.7 and pillow 8.3.2