avi, mpeg2, mpeg4 to dvd software

Looking for some to make software that will convert mpeg2, mpeg4, and avi to dvd format. Would like it to be able to import many movies, compress them to fit one standard dvd, be able to make a menu, then burn the project to dvd Also, when it coverts the video, it should also convert the audio too. Many programs out there do not do this, and the audio is not in sync with video. Any other ideas for software by programmer welcome. Dave