[FFmpeg-user] OSX 10.9 libx265

[Daniel]

Hello,
I installed ffmpeg to OSX 10.9 with tho following command:

brew install ffmpeg --with-fdk-aac --with-freetype --with-libass --with-libvpx --enable-libx265

First during compiling I got the message: --enable-libx265: unknown command
And then when I run a shell with libx265 I get the result:

Unknown encoder 'libx265'

Can someone give me a hint how to activate libx265 on OSX Mavericks?

Kind regards
Daniel