Live video stream play permission on server-side

I have a live video stream application one-to-many for
example, and i want to send video only to few clients, not to all.
Like:
quote:
application.onConnect = function(client, canSeeVideo) {
// canSeeVideo = boolean
this.acceptConnection(client);
if (!canSeeVideo) client.receiveVideo(false);
// and after this, can be swich to TRUE or FALSE ?
client.receiveVideo(true);
I only want to do restriction for Video, from server-side
with FMS, or if can't be possible.. how can i put for example a
black screen on video ? :) and after can be removed, etc...

1.
necesary client.receiveVideo() and client.receiveAudio()
server-side functions
Thank you fmslove for you trying to help me but
client.readAccess property can NOT be set after client
connection was accepted, and for me is useless. Any other
solution(s) ? i strong recomend to Adobe FMS dev staff to implement
this feature because is refering to security client-side solution
from server-side. I have bad experience with users trying to modify
the Flash Player (plug-in) run memory and set values for my swf
without my accept, and is nothing that i can do from client-side
like NetSream.receiveVideo(false) on many-to-many or one-to-many
live A/V stream.
2.
a necesary server-side video encoder solution better than
Sorenson Spark
If in future FMS staff from Adobe will implement this
necesary security feature on server-side like a copy of
NetSream.receiveVideo() function from client-side, i will be happy
if i see a solution to encode LIVE video stream on server-side
because
Sorenson Spark video encoder built-in Flash Player (plug-in) is
very old and unuseful.
If this can't be possible i hope the future Flash Player
version (10) will have a better video encoder built-in than
Sorenson Spark !!!

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