^^ Stop using a media player to preview AVIs. For one thing it doesn't have a DAR to correct the image. Load the video into Virtualdub.
Video-->Copy sourceframe to clipboard
Then paste it into Photoshop and make a picture and we can see how it looks.
EDIT: I actually use Virtualdubmod because it has a snapshot function, under the video tab, that Virtualdub does not seem to have.