[h323plus] Silk codec support

[Łukasz Czekierda]

Dear Simon, Robert and all H323Plus Team,

I'm still having problem with SILK codec. Today I downloaded sources 
from CVS and still the same: "SKP_Silk_Encode returned -4".

Am I the only who experiences such a problem?

Regards,
Łukasz


W dniu 2011-01-14 11:39, Łukasz Czekierda pisze:
>
> 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 at lists.packetizer.com
> [mailto:h323plus-bounces at lists.packetizer.com] On Behalf Of Robert 
> Jongbloed
> Sent: Wednesday, January 12, 2011 9:26 AM
> To: h323plus at 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 at lists.packetizer.com [mailto:h323plus- 
>> bounces at lists.packetizer.com] On Behalf Of Simon Horne
>> Sent: Tuesday, 11 January 2011 9:32 PM
>> To: 'Łukasz Czekierda'
>> Cc: h323plus at 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 at lists.packetizer.com
>> [mailto:h323plus-bounces at lists.packetizer.com] On Behalf Of Lukasz
> Czekierda
>> Sent: Tuesday, January 11, 2011 7:42 PM
>> To: h323plus at 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
>
>
>