Rename UDF / ISO files

update-names.py

#!/usr/bin/env python2.7
#Usage:
#./update-names.py FILE.iso
#Always make backups. 
import sys
print(sys.argv[1])
file = open(sys.argv[1], "r+b")
bytestring = ''
# DVD Titles are stored in seven location on UDF disk images 
offsets = [32808, 65561, 67701, 71765, 98329, 100469, 104533] 

#Retrieve the title from the ISO file
def getTitle(startByte):
	byteString = '' 
	endByte = startByte + 24
	for currentByte in range(startByte, endByte):
		file.seek(currentByte)
		byte = file.read(1)
		byteString = byteString + byte
	return byteString

#If your title is fewer characters than the previous title, this cleans the file
def clearTitle(startByte):
	endByte = startByte + 24
	for currentByte in range(startByte, endByte):
		file.seek(currentByte)
		file.write("\0")
#Write the title
def writeTitle(offset, title):
	file.seek(offset)
	file.write(title)

for offset in offsets: 
	print(getTitle(offset))

answer = raw_input("Change names? y/n ")
if answer == "y":
	print("Proceeding...")
	for offset in offsets: 
		clearTitle(offset)
	niceTitle = raw_input("Case sensitive title (Max 24 chars): ")
	for offset in offsets: 
		writeTitle(offset, niceTitle)
file.close