Media Server :: P2P Multicast And Upstream Bandwidth
Jan 27, 2012
I'm in the process of developing a realtime video chat application where multiple users can send video streams simultanuously. The number of users receiving the streams can be very big, e.g. 10 broadcasters and 500 receivers, each receiver should get all streams.
I use RTMFP connections to an FMS and streams are published in P2P multicast groups by passing the groupspec to the NetStream constructor. Currently I'm having problems with audio/video synchronization and video stream 'jumps' (not continuous). From what I read on other threads, this is related to the fact that there is not enough upstream bandwidth for sending the streams. So my questions are:
How to calculate the required upstream bandwidth on every peer for the given example of 10 broadcasters and 500 receivers (is it 10*bandwidth of one stream)?What settings (on NetStream, Camera, Microphone etc.) should be used for best results and how to adapt them based on the number of broadcasters?
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We are having a little problem implementing bandwidth detection with FMS, for some reason when enable it, bandwidth consumption spikes significantly I am wondering why? and if there a white paper somewhere that would talk about how properly implement this feature.
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Jun 1, 2010
Is there anyway to utilise the bandwidth of the flash media server from the server side in such a way so that the streaming will happen from the flash media server to the user based on the user internet connection speed. So users with low bandwidth will receive less streaming data in their buffer and users with high bandwidth will receive more streaming data into their buffer from the server.
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Oct 15, 2010
There seems to be great documentation on multicasting live streams.I can't find anything about multicasting recorded stream. Is there documentation? Or any other sources of info on multicasting recorded streams?
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Oct 27, 2010
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Nov 9, 2010
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Feb 28, 2011
We are testing IP Multicast, with Flahs media player 4.0. We set up the encoder and generated the manifest file. Multicast start, but we see lot of bufferring and video running fast. After about 2 minutes, the encode stops publishing to the server. We are using digital rapids as the encoder.
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Mar 9, 2011
I create a local netconnection, and the netgroup on the server side. How can I record the stream that is published to a netgroup?
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Nov 16, 2011
We have a video broadcasting platform and we use FMS 4.5 to broadcast a multicast stream. My question is : can we do QoS tagging of this multicast stream ?
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Nov 29, 2011
I am testing the P2P function of Flash Media Server 4.I have setup two environment for testing, but only one can success to using the P2P.However, i found that there is some problem in network connection.Here is my procedure to create the Peer to Peer Multicast.1. Using Multicast Config Tool ( oolsmulticastconfigurator) to create the "Peer to Peer" type (Generate the manifest.f4m and copy the publisher stream name to flash encoder) --> multicast type: Peer to Peer --> RTMFP URL: rtmfp://true ip/miltocast --> stream name: livestream --> publish password: password --> group name: fms.multicast.example --> ip multicastaddress and port: 224.0.0.254:30000 Using Flash encoder with the public stream name connect to flash media server.3. In client side, we use the example player ( oolsmulticastmulticastplayer)
First Environment (A) - not work
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Data center reported that "All the port have opened (TCP/UDP)
[code]....
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Nov 4, 2011
We have a problem with amazon FMS 4.0.3 server for enable muticast.In the server we have open all the port for ensure the good works.but when we used the http://public-dns/multicast/multicastplayer/multicastplayer.html, we have this message : The connection attempt to FMS failed.In the server administration we can view the Flash Media Live Encoder session but the multicastplayer cannot connect on the rtmfp://public-dns/multicas
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Dec 19, 2010
I know this question comes up from time to time, but it's completely unaddressed in the documentation and I'd like there to exist a more authoritative treatment of the subject.Like many other developers, we're trying to record multicast RTMFP streams. We see three options:
Broadcasting clients open two outgoing NetStreams: one for the multicast group through RTMFP, and another directly to FMS through RTMP for recording. One downside to this solution is that now the user has two outgoing streams, so available outbound bandwidth for any broadcasting client could easily become a constraint on video quality.One can stream to FMS 4 using RTMP and have FMS-side code that records and broadcasts the stream to the multicast group using RTMFP (recommended by JayCharles at http:url...). I haven't tried this out yet but my guess it that it will have worse video quality than a pure RTMFP solution. Is my concern justified?Super-hacky solution: one could have flash player running in some kind of virtual environment on a server. This flash player could subscribe to the multicast stream and record the video at a systems level. Has anyone tried a hack as daring as this? What solution is recommended by Adobe?It's incredible to me that FMS 4 can't act as an RTMFP consumer, thereby both acting as a multicast node and also recording the video. Can anyone at Adobe comment on this omission in functionality?
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Mar 2, 2011
I work for a carrier, and am looking at implementing IP Multicast on an MPLS network to support enterprise executive webcasts. As your probably aware, there are multiple multicast methods available.
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Apr 5, 2011
am setting up multiple multicast sessions, i generated configurations for each session using a seperate stream name, IP address, port.
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Sep 24, 2011
Where i can download RTMFP fms multicast Player?
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Oct 27, 2010
As stated in the title, I want to know how to determine if my server/host has native bandwidth detection. I have FMIS 3.5 installed on my Linux server. Is this a setting in FMIS or is this something I have to call my host to find out?
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Mar 21, 2011
I'm developping a FMS 4 application that read an external stream, and then, republish it in multicast:
1.- So, first of all I open a NetConnection to the remote application. And I associate it to a new Stream created in the application. Then I have the stream available in my application.
nc = new NetConnection();
nc.connect(REMOTE_APPLICATION);
nc.onStatus = function(info)
[Code].....
But, I don't know who would be the client in the registerStream method. Which reference should I add there? Is it possible in this way?
I made another different script that republish that stream in localhost using NetConnection.publish(localhost/sameapplication). It works properly. But I would like to be able of managing it in the other way.
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Mar 9, 2011
I have followed the code provided in a thread in this forum on recording a multicast:
[URL]
Basically, it gets aan RTMP stream from a client and attached that incoming stream to an outgoing RTMFP stream with multicast enabeled.
Everything works fine, except, after the client disconnects from the server, the multicast netstream on FMS continues its life. The admin panel shows that netstream as a stream with type Live.
I have tried things like:
ns.publish(false);
ns.attach(false);
but the stream keeps staying on the server, how is it possible to get rid of it when the client disconnects?
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Nov 25, 2011
setup multicast event with recorded videos not with live stream. how to setup multicast address that ask in multicast configuration utility....
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Sep 23, 2011
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If the answer is "yes",Whether i should make a check function that make these client back to "RTMP"?
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[URL]
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Method not found (recData)
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data += "S->C";
}
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[Code].....
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Need to know how to calculate bandwidth for fms shared object used in a text chat application..
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