I just finished writing a (very) simple launcher for WinFF, a GUI front-end for the FFMPEG command-line video encoder. I was having some trouble with the NSIS installer, so it's a ResHacked 7-Zip SFX archive instead. Also, the launcher is written in AutoIt3. Everything has been UPXed. The source is included in the WinFFPortable\Other\WinFFPortableSource directory. The download is just over 5MB. Enjoy!
EDIT: I forgot to include a link to the source of WinFF. It's written in Free Pascal/Lazarus and is available here: