I make a 4.6 gb ts_video folder with tmpg dvdauthor using cvd files which are dvd compliant and when i try to use dvdshrink to shrink the files to 4.3 gb i get an error message from dvdshrink saying `cannot decrypt vobs reason unknown` so i have to make an iso file and mount it in alcohol to get around this problem,any help on this matter to skip making an iso?