The best way to resize an AVI???

I've heard that the best way to resize an avi is to use AutoGK. I have several AVI's with black bars on the side. I'd like to get rid of those. I also have several AVI's in letterbox format, but I don't like the skinny letterbox look, I like it a little more full, like with TV shows on Fox with just a little bit of black on the bottom and the top..

Will I be able to do something about both these concerns with this program and how do I get started with it? (Sorry, I'm terrible about reading instruction manuals!)

 

Why don't you try Virtualdub?
That way, you get manual control and can do pretty much what
you like.

 

Will try that. They have a x64 edition of it too. Also...and I know that this is kind of a stupid question, but I know with software that just about anything is possible...Is there a program out there, other than VirtualDub or AutoGk, that will turn a non-Letterbox video file into Letterbox and also adjust the sizes of video file's that are already Letterbox? I thought it couldn't hurt to ask!

I did a little Googling and found this page on Letterboxing but I'm unsure what program they are referring to in it:
http://www.guygraphics.com/tips/letterboxing.html

 

You can give Avidemux a try.

 

I have messed around with AVIdemux bt have had only mixed results. I like the crop feature on that, but still, when I try to turn an AVI that has some black bars on the right and left sides into a letterbox looking video, the whole thing just comes out larger but not in letterbox.