Get ffmpeg, dvdauthor, dvdstyler installed on your system, then you can:
Code:ffmpeg -i source.avi -target ntsc-dvd target.mpg
and either do this to make a simple DVD:
Code:dvdauthor -t -o target.dvd -f target.mpg
dvdauthor -T -o target.dvd
or use dvdstyler to create a basic