RTMP stream publisher send metaData

[pierre huber]

Hello,

According the Adobe's documentation about NetStreams publishers and subscribers : http://www.cs.vu.nl/~eliens/mt/assets/flex3/langref/flash/net/NetStream.html

when we send data from a publisher netstream ns.send("@setDataFrame", "onMetaData", metaData);

to subscribers netstreams.

With MonaServer clients who are subscribed to live stream before the data is sent, receive the data as soon it is sent by publisher (it works ok)

But client who subscribed to the stream after the data sent by publisher, should receive data when they subscribe to the live stream (it works not with MonaServer)

My question is : is it the normal behaviour of the MonaServer, or am I missing something on client or server side ?

(FlashMediaServer keep in memory this data as long as the publisher is connected, but I can understand tha MonaServer will not do it... it's a question of choice :-)

Thank you for your help...

Pierre

[mathie...@gmail.com]

Hi Pierre,

Yes, should work like that, I have just tested now and I confirm the bug. I don't understand why, because medata are sent to new subsribers, certainly an ordering message problem... I fix it tomorrow Pierre.

Best regards,

Mathieu

[pierre huber]

Hello Mathieu,

Thank you very much for your fast reply...

How can we know when a fix or a new version of MonaServer is available ?

Pierre

[Thomas Jammet]

Hi Pierre,

For an issue like this one we tell directly to you when the correction is done. For new releases when we evaluate that the version is stable we create a new tag, I add an article on the group and on social networks.

Thanks for your report and tell us if you need more informations.

Regards

--

Thomas JAMMET

Freelancer - MonaServer.ovh

2 Rue Mila - 82000 Montauban (France)

Tel : +336 23 46 39 80

http://fr.linkedin.com/pub/thomas-jammet/5a/411/60b/

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[mathie...@gmail.com]

Hi Pierre,

This metadata problem should be fixed now (see last master version), let me know if it works on your side.

[pierre huber]

Hello Thomas thank you very much for your work and taking time to fix problems we could have using MonaServer.

Now the subscriber receive data when he starts to play the live stream even if the publisher ha sent metaData before it's subscription to the stream (don't know if a I am really clear :-))

It works perfectly now on Centos Server , air android and browser flash clients using RTMFP.

Pierre

Le samedi 11 avril 2015 11:47:47 UTC+2, pierre huber a écrit :

[pierre huber]

Hello and sorry Thomas but I still have a problem with the behaviour of MonaServer :-(

I have one publisher who set metaData at start of it's publishing.

I have 2 subscribers and when they start to play to the live stream they get the metaData (it works ok)

but when one of the subscribers close the live stream, close application, restart application and restart to play the same live stream, this time he can't get metaData at start of playing the live stream

Thank you for your help ...

Le samedi 11 avril 2015 11:47:47 UTC+2, pierre huber a écrit :

[Mathieu Poux]

Hi Pierre,

We have found a problem with RTMP and a @setDataFrame invocation, try with the last corrective, it should work now.

Regards,

Mathieu

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[pierre huber]

Hello Thomas,

Sorry but I can't make it works :-(

Here an example of the test I have made with actionscript flex client and RTMFP protocol :

1 - One publisher starts a new stream

2 - A subscriber play the stream

3 - The publisher send data with the send method : netstream.send("@setDataFrame", "onMetaData", metaData);

4 - Subriber #1 receive data in the "onMetaData" method => OK

5 - A new subscriber (#2) starts to play the stream, it receive data in the "onMetaData" method => OK

6 - An other subscriber (#3) starts to play the stream, but method "onMetaData" is not called => KO

I don't understand this behaviour ....

Have you an idea ?

Thank you

Pierre

Le samedi 11 avril 2015 11:47:47 UTC+2, pierre huber a écrit :

[mathie...@gmail.com]

Hi,

I have just tested exactly your scenario and here it works (there is no reason that the third client doesn't receive it), it's always the third client which doesn't receive it? or it's random? the third client is exactly same client that the others?

[Thomas Jammet]

I have build this script to test Metadata : https://github.com/MonaSolutions/MonaServer/blob/master/FunctionalTests/src/RTMPMetadata.as

It use one publisher and three subscribers, it works with both RTMP and RTMFP, maybe it can help you on your client code.

Thank you for your report,

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Thomas JAMMET

Freelancer - MonaServer.ovh

2 Rue Mila - 82000 Montauban (France)

Tel : +336 23 46 39 80

http://fr.linkedin.com/pub/thomas-jammet/5a/411/60b/

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[pierre huber]

Hello Thomas, and thank you for the tests code...

I still can't make it works but maybe it's my MonaServer install procedure on CentOs:

- I delete the current MonaServer folder

- I launch command : git clone https://github.com/MonaSolutions/MonaServer.git

- "cd MonaServer" and launch "make" command

I have make a small flex application to test the publisher and subscriber functions (attached file, it's a simple air windowed application) : 

- when the application starts, it launch a publisher stream

- the first button send metaData to the publisher stream

- the second button starts to play the stream and the "onMetaData" method should be called as soon as the subscriber starts to play, but it fails..

Is it my install of MonaServer or my client code ?

Do you have an idea ? thank you very much for your help ...

Pierre

[pierre huber]

And thanks to Mathieu too ... :-)

[Thomas Jammet]

Hi Pierre,

I think I know where the problem is, in your sample the publisher does not publish anything so listeners do not receive onMetaData message and neither the "NetStream.Play.PublishNotify" event.

You can try to send first a dummy message using "publisherStream.send("dummy","nothing");" and I think it will do the job...or you can publish something meaningful!

I hope it will help you

[pierre huber]

Thomas,

I see, but it will be not a solution for my specifics needs.

Anyway it's no more a problem for me because I have decided to execute a server command in lua to do the job, it has more sense and more efficient too (for my application)

Thank you, and Mathieu, for all your work and support on MonaServer.

Pierre