I use Nero to convert mpeg and avi files to DVD but the audio sometimes doesnt match the picture, I have no idea whats wrong or how to sort this....
Try one of the avi/mpeg source files in DVD Flick. http://www.afterdawn.com/software/video_software/dvd_tools/dvd_flick.cfm
the file itself can be OOS before even going to nero, do yours play ok all through i check avi about 3/4 the way through you can usually see around that piont.