image squished vertically and letterboxed

[blitzen]

Hi:
I have a video avi where the frames are vertically squshed and have letterboxing above and below the frame.
I would like to remove the letterboxing, unsquish the frame and, if needed, resize the frame to view the file in glorious normality.
I do not have a clue how to accomplish the above. What apps can I use to accomplish these objectives and where can I find guides to show me how to do this?
Thanks for any replies. All help is appreciated.
Lorne

[jagabo]

VirtualDub: add filters, null transfrom + crop, resize. video compression, save as AVI.