i downloaded winavi and want to convert .avi to dvd. when i start the converting a message comes up saying:
cannot render the graph, please make sure the media file can be played by windows media player.
i dont know what this means or how to rectify it. can some one tell me how to fix this problem. 
Make sure you have installed this:divx or xvid codec for avi file.Without codec,converter can’t work.
the link provided just reinstalls the programme i already have. wot do i have to download and how.
Try AVS Video Converter from AVS Video Tools.
You will have no such problems any more.
Also read step-by-step guide about how to convert video to DVD and burn it.