Divx Dvd Player Why Do Divx Files Playback Stretched On My Widescreen Portable DVD Player?

Why Do Divx Files Playback Stretched On My Widescreen Portable DVD Player? - divx dvd player

This player can play DVDs fine, but the DivX files that are about ... Although, if you play a team who have a perfect aspect ratio.
I noticed that with every DivX DVD player, I saw what must be fairly widespread.
Thank you.