Mastering DVD's

DVD flick is an awesome little app that puts an easy to use interface on top of the Ffmpeg project which is the bases for many modern media applications including VLC, this gives you a very powerful DVD mastering application that is also easy to use. It has a huge range of features and supports many file formats, here are the main ones of interest ..

AVI to DVD, FLV to DVD, HDMOV to DVD, MKV to DVD, MJPG to DVD, MPG to DVD, M2V to DVD, MP4 to DVD, M4V to DVD, NSV to DVD, NUT to DVD, QT to DVD, MOV to DVD, RM to DVD, SMK to DVD, OGM to DVD, WMV to DVD, ASF to DVD, 3GP to DVD, 3G2 to DVD.
DVD Flick supports DVD Authoring, ISO image creating, DVD burning also in one tool.

The project is very well maintained and has a very clean organised feel which is reflected on the website as well as the UI. There's a good guide on the project page and here's another one that gives a good quick intro but doesn't cover the relatively new menu creation features, but that is easy to figure out. This application belongs in your media tools without any question.