For my documentation. Here is the command line parameters, I used to convert a video file in mpg format to flv (flash video) format using ffmped (open source format converter)

ffmpeg -i Original_Video.mpg -deinterlace -ar 44100 -r 25 -qmin 3 -qmax 6 Converted_Video.flv

I will post details on where to get software and such, when I have time :).