Converting video from within stand alone Flash app

Hello all

It's been a while since I've posted here. I want to create an SWF or an EXE that can look in it's own local directory, find a video file, and with the click of a button by the user, convert that video or import the video into flash and play it on the stage.

I'm open to ANY and ALL suggestions to get anything close to this. Essentially, the videos will be imported and dumped into the folder from a web app, so we don't know what the videos will look like before they come in.

We're looking at short, 30 second videos that will average no more than 20 MB each in file size and will come in various formats: .mov, .avi, .wmv, etc.