SWF/FLV filetypes are quite proprietary, and I don't think such a beast exists... Macromedia would probably have a fit at the very least. I mean, SWF & FLV files contain much more than just video...
Frosty was right though, google is your friend... if such a beast truly exists, perhaps in among some other epic mobs, unreachable by us folk who solo the wilds. Ok, umm... I've gone too far, I'll hide now.
~ Jar