Dear Simon, Robert and all H323Plus Team,
Thanks for your very fast answer.
I have successfully built ptlib, h323plus (1.22) with silk codec and simple. I put silk_ptplugin.dll, iLBC_ptplugin.dll and gsm0610_ptplugin.dll into c:\pwlib_plugins (then also to c:\ptlib_plugins). Simple runs OK on XP and Windows 7, quality of G.711 and iLBC (both 13k and 15k) is good, but neither gsm nor silk work. There are some static, MOS is about 1... Additionally, simple app logs SKP_Silk_Encode returned -4 every few seconds. Am I doing anything wrong?
Regards, Łukasz
-------- Wiadomość oryginalna --------
Robert
I have checked the code into the h323plus CVS. There is no official ITU Generic identifier yet so it is using a Packetizer Identifer for the moment.
You can contact me offlist to discuss.
Simon
-----Original Message----- From: h323plus-bounces@lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of Robert Jongbloed Sent: Wednesday, January 12, 2011 9:26 AM To: h323plus@lists.packetizer.com Subject: Re: [h323plus] Silk codec support
I added SILK to OPAL a couple of months back. Unfortunately it was SIP only as I did not know what the H.245 encoding is for SILK, if any.
Now that I see there is at least a proposed standard, this should be able to be finished in a few minutes. It would be really nice if the two systems could use the same code for this.
Robert Jongbloed OPAL/OpenH323/PTLib Architect and Co-founder.
-----Original Message----- From: h323plus-bounces@lists.packetizer.com [mailto:h323plus- bounces@lists.packetizer.com] On Behalf Of Simon Horne Sent: Tuesday, 11 January 2011 9:32 PM To: 'Łukasz Czekierda' Cc: h323plus@lists.packetizer.com Subject: Re: [h323plus] Silk codec support
Lukasz
The issue is there is no definition of Silk in H.323
I wrote a submission to the ITU at the last meeting for inclusion http://wftp3.itu.int/av-arch/avc-site/2009-2012/1011_Res/AVD-3994.zip
The stumbling block is that SILK has defined dynamic payloads for each bitrate for interop with Skype. In H.323 you cannot tell the remote what payload to send, the remote will tell you want it will send. This becomes
an
issue if you are bridging to skype. There is a work around (submitted by Avaya for a different issue but same meeting) to include in the OLCack the payload that you expect the remote to send you.
I have a development H.323 silk plugin (8k and 16k bitrate) and I will commit them after the next stable release as it requires audio capability merging which needs to be committed. The idea is there is 1 silk
capability
for the different bitrates (rather than a capability for each bitrate) and you negotiate the actual bitrate by merging your local caps with the caps
in
the TCS.
Simon
-----Original Message----- From: h323plus-bounces@lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of Lukasz
Czekierda
Sent: Tuesday, January 11, 2011 7:42 PM To: h323plus@lists.packetizer.com Subject: [h323plus] Silk codec support
Dear H.323Plus team,
I have a question regarding support for skype's silk codec. Do you plan to support it soon? Maybe you have already started
development/integration? Do
you expect any obstacles?
Best regards, Łukasz Czekierda