READ THIS FIRST!!
This page is out of date and need to be updated.
For now, check out the WebRTC tutorial using SIPML5
If you would like to test Asterisk with WebRTC you can now use the latest shipping Chrome. Audio should work great, but Asterisk 11 does not support the VP8 video codec used by Chrome at the time of this writing.
Passthrough support for the video codec VP8 (and Opus for audio) was added in Asterisk 12.
See here for instructions on getting it installed: Building and Installing PJSIP-pjproject
Additionally on CentOS you may need to do "export LD_LIBRARY_PATH=/usr/lib". The alternative is passing the correct flags (usually --with-libdir) to all dependencies to install the libraries in /usr/lib64 instead of /usr/lib. You could possibily also play with the /etc/ld.so.conf.d configuration to achieve the same effect.