temp unpacker

album.bat

@echo off
setlocal enabledelayedexpansion
for %%f in (Album/pri_l_*.unity3d) do @(
	set id=%%~nf
	unpack.py Album/%%f Processed/!id:~6!_large.png
)
for %%f in (Album/pri_s_*.unity3d) do @(
	set id=%%~nf
	unpack.py Album/%%f Processed/!id:~6!_small.png
)
for %%f in (Album/pri_ll_*.unity3d) do @(
	set id=%%~nf
	unpack.py Album/%%f Processed/!id:~7!_llarge.png
)

unpack.py

import sys
import unitypack
from unitypack.engine.texture import TextureFormat
from pprint import pprint
from io import BytesIO
from PIL import ImageOps
from PIL import Image

if len(sys.argv) < 2:
	sys.exit("Usage: unpack.py <input_file>")
	
with open(sys.argv[1], "rb") as f:
	bundle = unitypack.load(f)

	for asset in bundle.assets:
		print("%s: %s:: %i objects" % (bundle, asset, len(asset.objects)))
		
		for id, object in asset.objects.items():
			if object.type == "TextAsset":
				data = object.read()
				# The resulting `data` is a unitypack.engine.TextAsset instance
				print("Asset name:", data.name)
				print("Contents:", repr(data.script))
			elif object.type == "Texture2D":
				data = object.read()
				print("Asset name: %s, Dimensions: %i %i" % (data.name, data.width, data.height))
				print("Format: %s" % (data.format))
				#pprint(dir(data))
				#pprint(data.color_space)
				
				# Texture2D objects are flipped
				img = ImageOps.flip(data.image)
				# Endian different, reverse bands
				if (data.format == TextureFormat.RGBA4444):
					img = Image.merge('RGBA', img.split()[::-1])
				output = BytesIO()
				img.save(output, format="png")
				
				if len(sys.argv) > 2:
					path = sys.argv[2]
				else:
					path = sys.argv[1] + ".png"
				with open(path, "wb") as f:
					written = f.write(output.getvalue())
				print("Written %i bytes to %r" % (written, path))
			else:
				print(object)
			#elif object.type == "AssetBundle":
			#	pprint(vars(object))