[Mp4-tech] Live Mp4 and server side multiplexing audio

[Jechiam Gural]

Hello,
I'm trying to figure out if it is possible to a send a separate video live 
stream to be multiplexed separately  with a number of different live audio 
streams on a streaming server, e.g. Darwin using a number of SDP files. Is 
there any reference on how such a solution could be obtained in a manner 
that enables to produce a number of audio "flavors" using only one live 
video feed, keeping in mind that the multiplexed video and audio should be 
delivered to all clients in sync....?
Regards,
Gural