I've ip camera that support h264 and rtp/rtsp, also camera supports two way audio. I know that it is possible to transfer audio/video from camera to user via WOWZA, but i need to transfer audio from client to that camera. Is that possible?
There is not a direct way to do this at the moment. You would need to implement RTSP/RTP out. It is a feature we plan on adding in a future release. Even then it probably will not initially support Sorenson Spark/H.263 out.
If you want to do it your self you can take a look at the videopassthru package which will give you access to the raw NellyMoser/Speex packets: