I just wanted to pass along a little information. I tried the program Total video2dvd the other day. You get a free trial download with a chance to win the license. It is very easy to use.....and I have tried several programs with no luck. I thought you may want to try it to convert like your avi to dvd. I will include the link below.......
http://www.effectmatrix.com/total_video_to_DVD_Author/
Alisha