Just something you can try if you want to use tunebite and dvd decryptor. Set dvd decryptor to file mode, not iso. Go to tools, settings, file, and set file splitting to none. Amongst the files it creates, there will be one giant .vob (thats your movie). Change the file extension of that file, from .vob to .mpg (no conversion or changing of the file, just change the file name). Try feeding that mpg to tunebite.