I capture analog video with my pvr150 which makes a native mpg file. I then made a script using ffmpeg to convert it to ntsc-dvd format and burn to a dvd with growisofs all in 1 script. I made the capture scripts as well. I have a zenity frontend and a kdialog frontend so it doesn't matter whether I use kde or gnome.
I do a lot of analog to dvd conversions for friends and family of home movies and such. I also do this for my kids school for any performances they do free of charge including the dvd media. For those ones I just encode the ntsc-dvd with ffmpeg and then use dvdstyler to create a nice chaptered dvd and end up burning at least 50 copies for them to start and more if they need it depending on if it was just a class presentation or a whole school wide presentation.