To create a DVD from some random XViD encoded AVI file:
$ ffmpeg -i my_video.avi -target dvd -aspect 16:9 -sameq my_dvd_video.mpg $ mkdir DVD $ dvdauthor --title -f my_dvd_video.mpg -o DVD $ dvdauthor -T -o DVD $ su - # growisofs -dvd-compat -dvd-video -speed=4 -Z /dev/dvd ./DVD/*