I'm using the binaries of ffmpeg, so I'm safe, it won't infect the rest of the software with it's copyleft-ness and all I really have to do is include the source somewhere.  Which I may as well zip up and put in the legal/ dir, since as far as I'm concerned the original source is just another legal document I'm required to include.

https://stackoverflow.com/questions/5437501/can-i-use-gpl-software-binaries-in-commercial-environment
