confused..

Entree
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Joined: 27 May 2007
Posts: 2
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So, I was trying to play an avi file I just downloaded and DivX told me “This file contains a track in an unknown format (code '''') format. You may need to install a DirectShow decoder for this video format in order to play this file." And when I try to open this file in another program (like Real Player) it says thta it’s not a valid Win32 application.

Can someone tell me where I can find what I need to play this file?