Windows Python 3+ script to dump the contents of an Unreal PAK file to CSV. Uses latest UnrealPak.exe installed or you can pass the path to UnrealPak.exe as a command line options.

pak2csv.py

#script to parse the output on UnrealPak to create a CSV file so the contents of a pak
#file can be checked.
#
# example: py -3 pak2csv.py -f D:\TheGame\Saved\StagedBuilds\IOS\cookeddata\TheGame\content\paks\pakchunk0-ios.pak
#

from optparse import OptionParser
from pathlib import PurePath
from os.path import exists
import re
import subprocess

UPAKPATH = "Engine/Binaries/Win64/UnrealPak.exe" 
UPAKOPTS = "-List"


def dopakfile(filepath, unrealbasepath):

	
	upak = PurePath(unrealbasepath, UPAKPATH)

	# print out a header for the CSV
	print("Path, Offset, size(B), size(K), size(MB), sha1, compression")
	
	app = subprocess.Popen([upak, filepath, UPAKOPTS], stdout = subprocess.PIPE, universal_newlines = True)
	for line in app.stdout:
		regex = r"LogPakFile: Display: \"([\w\/\.]*)\"\s*offset:\s*(\d*),\s*size:\s*(\d*)\s*bytes,\ssha1:\s([\dABCDEF]*),\scompression:\s*(.*)"
		match = re.match(regex, line, re.MULTILINE)
		if match:
			bytesize = int(match.groups()[2])
			kilobytes = bytesize/1024
			megabytes = kilobytes/1024

			print("{}, {}, {}, {}, {}, {}, {}".format(match.groups()[0], match.groups()[1], bytesize, kilobytes, megabytes, match.groups()[3], match.groups()[4] ))






def findunreal():
	"""iterate through the registry keys looking for the latest version of Unreal Engine that is installed"""
	import winreg
	#connecting to key in registry
	access_registry = winreg.ConnectRegistry(None,winreg.HKEY_LOCAL_MACHINE)

	access_key = winreg.OpenKey(access_registry,r"SOFTWARE\EpicGames\Unreal Engine")	

	lastpath = None
	n  = 0
	while True:
		try:
			subkeyname = winreg.EnumKey(access_key,n)
			subkey = winreg.OpenKey(access_key, subkeyname)
			val, valtype = winreg.QueryValueEx(subkey, "InstalledDirectory")

			path = PurePath(val, UPAKPATH)
			if exists(path):
				lastpath = val

			n = n + 1
		except OSError as e:
			break

	return lastpath

if __name__ == "__main__":
	usage = """%prog <pakfile path> to dump the contents of a pak file to stdout as CSV. If no unreal
	path is pecified then the code will search in the registry for the laest Unreal installation.
	"""
	parser = OptionParser(usage=usage)
	parser.add_option("-f", "--file", dest="filename", help="pakfile to interogate")
	parser.add_option("-u", "--unreal", dest="unrealpath", help="quoted path to unreal install eg \"C:/Program Files/Epic Games/UE_4.25\"")

	(options, args) = parser.parse_args()

	unrealpath = options.unrealpath or findunreal()
	if unrealpath == None:
		print("ERROR: failed to find unreal in the registry")
		exit(1)

	if options.filename == None:
		parser.print_help()
		print("\nERROR: -f argument required: it's the path to the pak file to interogate\n")
		exit(1)

	if not exists(options.filename):
		print("\nERROR: input file {} does not exist\n".format(options.filename))
		exit(1)		

	dopakfile(options.filename, unrealpath)