Python 在 Pillow 中保存动画 GIF
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Saving an animated GIF in Pillow
提问by leewz
(Python 3.4, PIL 1.1.7, Pillow 2.5.1)
（Python 3.4，PIL 1.1.7，枕头 2.5.1）
I expected this to copy the original GIF.
我希望这会复制原始 GIF。
from PIL import Image
im = Image.open(filename)
im.save('temp.gif')
Instead, it saves the first frame as a still.
相反，它将第一帧保存为静止图像。
What am I doing wrong?
我究竟做错了什么？
采纳答案by blakev
Use the script found on the Pillow Github, here.
使用 Pillow Github 上的脚本，这里。
import ImageSequence
import Image
import gifmaker
sequence = []
im = Image.open(....)
# im is your original image
frames = [frame.copy() for frame in ImageSequence.Iterator(im)]
# write GIF animation
fp = open("out.gif", "wb")
gifmaker.makedelta(fp, frames)
fp.close()
回答by mr. Y
One can see that the new version of gifmaker script simply uses save method with special kwargs for GIF.
可以看到新版本的 gifmaker 脚本简单地使用了带有特殊 kwargs 的保存方法用于 GIF。
As the documentation states (https://pillow.readthedocs.org/en/latest/handbook/image-file-formats.html#saving-sequences):
正如文档所述（https://pillow.readthedocs.org/en/latest/handbook/image-file-formats.html#saving-sequences）：
When calling save(), if a multiframe image is used, by default only the first frame will be saved. To save all frames, the save_all parameter must be present and set to True.
If present, the loop parameter can be used to set the number of times the GIF should loop, and the duration parameter can set the number of milliseconds between each frame.
调用 save() 时，如果使用多帧图像，默认情况下只会保存第一帧。要保存所有帧，必须存在 save_all 参数并将其设置为 True。
如果存在，loop 参数可用于设置 GIF 应循环的次数，duration 参数可设置每帧之间的毫秒数。
回答by reducing activity
Version that requires only pillow and works:
只需要枕头和工作的版本：
from PIL import Image
width = 300
height = 300
im1 = Image.new("RGBA", (width, height), (255, 0, 0))
im2 = Image.new("RGBA", (width, height), (255, 255, 0))
im3 = Image.new("RGBA", (width, height), (255, 255, 255))
im1.save("out.gif", save_all=True, append_images=[im2, im3], duration=100, loop=0)
using existing images:
使用现有图像：
from PIL import Image
im1 = Image.open('a.png')
im2 = Image.open('b.png')
im3 = Image.open('c.png')
im1.save("out.gif", save_all=True, append_images=[im2, im3], duration=100, loop=0)
And, as too low versions of pillow are silently failing here is as a bonus version with a library version check:
而且，由于枕头版本太低，这里无声无息地失败了，作为带有库版本检查的奖励版本：
from packaging import version
from PIL import Image
im1 = Image.open('a.png')
im2 = Image.open('b.png')
im3 = Image.open('c.png')
if version.parse(Image.PILLOW_VERSION) < version.parse("3.4"):
print("Pillow in version not supporting making animated gifs")
print("you need to upgrade library version")
print("see release notes in")
print("https://pillow.readthedocs.io/en/latest/releasenotes/3.4.0.html#append-images-to-gif")
else:
im1.save("out.gif", save_all=True, append_images=[
im2, im3], duration=100, loop=0)
