combining or muxing ip camera and ip encoder audio to one signal

We have 3 Axis 3000 cameras and 12 Axis 8221 audio encoder. the Axis can output four camera views at once. These need to be split and combined with the audio from the Axis audio encoder (one encoder per camera view) then streamed via wowza and nDVR addon.

I have set up a server with Wowza, tuned for production, etc. but I cannot get the audio and video muxed/combined into one stream to send over to wowza.

I don’t know if the client will be open to bringing in a consultant but I’d like to present it as a possibility. The site is in Santa Maria CA at a school.

Thanks.