[demurgos]

I'm not very familiar with them, but I always assumed that there is a lot of overlap between the maintainers of both projects.

[SSLy]

Well, they are just unrelated. VLC has a plugin to access ffmpeg codecs via libav*, that's about it.

[guipsp]

They are not completly unrelated. There is significant overlap. FFMPEG also uses libs from VLC.