WinFF is a GUI for the command line video converter, FFMPEG. WinFF does multiple files in multiple formats at one time. WinFF is available for Windows 95, 98 , ME, NT, XP, and VISTA, Debian, Ubuntu, and Redhat based GNU/Linux distributions.
One of the best apps to convert from DVD to AVI, maybe not the fastest, but the one with i've got better results on quality and size of file using xvid codec. Also great to do batch convert of many files.
I highly recommend this software to do batch encoding of videos. It can convert videos to formats of many portable devices such as media player and cellphones. This to me is the easiest video encoding software that also gets the job done. It is very user friendly which is the key point which is why I recommend it to my friends. I think it is good enough for most people to be their single all-in-one video encoder.