Keeping ascpect ratio in TMPGEnc

[fast__cars]

Hey, Im trying to convert an avi to an mpeg.. but i want to keep the current aspect ratio.
I can get it to keep the ratio, but it always halfs the size of the original movie... It was originaly 592x256, and when it started converting it, TMPGEnc cut it down to 352x240

Can anyone tell me how to get it to keep the aspect ratio, but without making it tiny?
Or better yet, can anyone tell me a software that will convert my avi to mpeg without changing anything but the file extension?

[gd_nimrod]

When you tell TMPGenc to convert a file, it automatically needs to know whether its vcd or svcd - which results in the reduced aspect ratio. You COULD however, create an XVCD which will keep the ratio intact.

Simply load the unlock.mcf template and then you can manually change the ratio yourself.