normal dvd.
its says this.
Scanning title 1 of 47...
ERROR: dvdnav: Read Error, Error reading NAV packet.
ERROR: dvdnav: Read Error, Error reading from DVD.
ERROR: dvdnav: Read Error, Error reading NAV packet.
ERROR: dvdnav: Read Error, Error reading from DVD.
over and over again
Make sure that VLC is installed, and that the versions of VLC and Handbrake are the same (x32 or x64). That should clear up your issue.