It's not wise to render an AVI straight from Maya.
the best way would be to render an image sequence and then convert the sequence to an avi in another app.
Mike has very kindly made a fee tutorial to download on this subject using an app that is aslo free .You can find the tutorial here .

https://www.simplymaya.com/movie_page...html?tut_id=49

Hope this helps solve your problem.