Reads a Minecraft texture file and its accompanying .mcmeta file and generates the specified animation

mcmeta_anim.py

# depends on Pillow/PIL and ImageMagick's `convert' utility

from PIL import Image
import json
import sys
import os
import tempfile
import shutil

# specify the image file (not the mcmeta file) as the first argument

image_file = sys.argv[1]
mcmeta_file = image_file + '.mcmeta'


json_data = open(mcmeta_file,'r').read()
anim_data = json.loads(json_data).get('animation')

image = Image.open(image_file)

texture_size = image.width

def get_frame(framenum):
	return image.crop((0,framenum*texture_size,texture_size,(framenum+1)*texture_size))

frames = []

for fnum in anim_data.get('frames',range(int(image.height / texture_size))):
	frames.append(get_frame(fnum))

#frames[0].save(out_gif, save_all=True, append_images=frames[1:], duration=anim_data.get('frametime'))
# ^ does not work apparently, so we use IM

tempfolder = tempfile.mkdtemp()
out_gif = image_file + '.gif'

for index,frame in enumerate(frames):
	frame.save("{}/{:03d}.png".format(tempfolder,index))

os.system('convert {}/*.png -set dispose previous -set delay {} -loop 0 {}'.format(tempfolder,anim_data.get('frametime',1)*10,out_gif))

shutil.rmtree(tempfolder)

it kinda works though i think the frame delay might be a bit off