This splits a long DVD into two separate movie files then creates a pair of smaller DVDs using dvdwizard, preserving chapter offsets. Useful for backing up a dual layer DVD onto two single-layer DVD-Rs. It also requires lsdvd and mplayer/mencoder or streamdvd (if you can find it).
Or you can use dvdsplit just to display chapter start times on a single line ready to pass to dvdauthor (lsdvd displays multiple lines of chapter lengths so the information needs parsing for use with dvdauthor).
Download dvdsplit (version 1.0)
for usage details.