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Re: [Linphone-developers] Question about oRTP sequence numbering


From: Henning Christiansen
Subject: Re: [Linphone-developers] Question about oRTP sequence numbering
Date: Wed, 18 Mar 2009 13:08:30 +0100

Hi,

I am using ortp -0.13.1.

The hint I received yesterday implies to adopt a change from 0.15.0.

I will give it a try.



At 22:02 17.03.2009 +0100, Simon Morlat wrote:
Hi,

This bug isn't in last version, true ?

Simon

Le Tuesday 17 March 2009 16:06:45 Henning Christiansen, vous avez écrit :
> Hello all,
>
> I see a strange behaviour when sending RTP packets via oRTP.
>
> Whnn regularly sending 160 byte packets using
>
>    rtp_session_send_with_ts(...)
>
> I see that the sequence numbers are incremented as expected.
>
> When during this regular cycle I send one DTMF request (according to
> RFC2833) using
>
>    rtp_session_send_dtmf,
>
> I see that the sequence number of the first RTP packet is incremented by 2
> (instead of 1). After this, the sequence number of the next "standard" RTP
> packets sent after calling rtp_session_send_with_ts resume with the last
> sequence number of the DTMF related packets.
>
> Example:
>
> 5 standard voice packets followed by one DTMF digit followed by another 5
> voice packets:
>
> Voice:   Seq=0
>           Seq=1
>           Seq=2
>           Seq=3
>           Seq=4
>
> DTMF:    Seq=6      (I would expect Seq=5 here)
>           Seq=7
>           Seq=8
>           Seq=8
>           Seq=8
>
> Voice:   Seq=8      (I would expect Seq=9 here)
>           Seq=9
>           Seq=10
>           Seq=11
>           Seq=12
>
> Any idea why I see this behaviour?
>
> At 22:04 16.03.2009 +0100, Simon Morlat wrote:
> >Hi,
> >
> >Enjoy the new features:
> >
> >         * linphone can now send large video pictures: up to SVGA,
> > configurable via
> >the user interface
> >         * automatic rescaling of the video windows to the video size of
> > incoming
> >stream
> >         * improved webcam support on windows
> >         * plenty of user interface cosmetic improvements
> >         * set a user friendly gtk theme by default on windows
> >         * linphonec can compile and work without libreadline
> >         * enable translations on windows
> >         * enable lookups of SRV records
> >         * new 'linphonecsh' program to send commands to a linphonec
> > running as daemon
> >using unix sockets or tcp.
> >         * bugfixing as usual
> >
> >Again a too long time has elapsed between last 3.0.0 and this new release.
> >I'm
> >sorry for all people who during this period contributed patches for bugs
> >already fixed in svn, and translations for strings that came obsoleted...
> >In the future, please use svn if one month has elapsed without a new
> > release.
> >
> >I now promise I'll make a new 3.0.1 release within the coming weeks to
> > take into account all patches and translations that will probably be sent
> > to this mailing list in the next days.
> >
> >http://www.linphone.org/index.php/eng/linphone_3_1_0
> >
> >Simon
> >
> >
> >_______________________________________________
> >Linphone-developers mailing list
> >address@hidden
> >http://lists.nongnu.org/mailman/listinfo/linphone-developers
>
> _______________________________________________
> Linphone-developers mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/linphone-developers





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