Stop using DVD Shrink to decrypt a disc.
For one, it's inferior to the decryption algorithms found in a dedicated ripping tool (
DVD Decrypter, AnyDVD, etc). And second, decrypting at the same time you transcode (shrink) the video can lead to visual artifacts on screen, even audio glitches.
DVD Shrink 3.2 is an excellent transcode/shrinking tool. But decrypt in advance.
Use
DVD Decrypter, DVDFabDecrypter, AnyDVD, etc. Most of the time DVD Decrypter works on all but the "latest and greatest" or "big name" movies. TV shows and the likes are unaffected.