Getting info on how many viewers are watching stream

I am trying to get info on how many viewers are watching stream, I tried getting info from stream object on FMS but I get just this data:

name = stream_5871

type = flv

bufferTime = 0

time = 329.375

publishQueryString =

maxQueueDelay = 500

maxQueueSize = 4096

syncWrite = false

Is it possible to see who is receiving stream?