I need more information of your scenario. Do you manage the WOWZA? do you know how wowza generate token?
We have build a secure module(authentication module) for secure streaming. We have a lot of experience with live streaming. Especially WOWZA, Darwin, Red5, Live555...
We have also worked with FFmpeg for 4 years. My transcoder is based FFmpeg with some customize to more control and stable.
We have also sucessful developed a Video Platform, VOD(video on demand) and Live Video. We have a lot of experience in live transcoding and streaming video. Your solution supports many inputs type as RTMP, UDP, RTSP, RTP, HTTP...output is encoded in H264/AAC over RTMP, UDP, HTTP...target devices are PC, tablet, smartphone( iOS, Android, Windows phone), smarttv.
We can streaming from Camera, Camrecoder, DVB-S, DVB-T video capture card... to web, smartphone, IPTV. We can consult you build a good video streaming system.
Let me help you.