x264 has a large community based support system on IRC. For 'open' discussions (non-anonymous) visit irc.freenode.net #x264dev to discuss any development questions you might have.
We also offer customers the ability to purchase a maintenance and support package. This package will get you direct access to our x264 developer team. This team of engineers is highly specialized group with extensive knowledge of x264 and multimedia.
For more information, contact our x264 Licensing group at info(at)x264licensing.com