Hi,
So what I understand from your post is, You need one video/audio multicast server, And adaptive Audio/video channels can be updated at run time. I have good experience on RTSP streaming, also used multicast application in upnp/dlna frame works. I think there are ready made solution available for streaming, like there is live555 library. Using this library we can easily implement RTSP server, Also It has multicast capabilities. I can easily provide support or full implementation of these server. I can negotiate with the bid price also, It would be good if I get this project as I have a good expertise in streaming application and this will be so much help full in building my freelancing profile.