[SIP Beyond VoIP] Opus at lower sample rate

Saúl Ibarra Corretgé saul at ag-projects.com
Wed Aug 27 16:13:59 CEST 2014


Opus is always advertised at 48KHz but it self adjusts. IIRC you always need to specify it at 48KHz.

On 27 Aug 2014, at 11:06, Shrikant Hallur <shrikantuh at gmail.com> wrote:

> Hi Team,
> 
> I am using sylkserver with xmpp client. Codec used is Opus at 48K.
> 
> Is it possible to use opus at lower sample rate(32K and 16K).
> 
> I observed "unsupported application" message in xmpp_trace.txt, when i use Opus at 32K. 
> 
> Find logs below,
> 
> 2014-08-27T14:28:40.136436+05:30 [sylk-server 32319]: RECEIVED: Packet 58, +0:08:58.818889
> <iq to='s_5hu3 at sylk.org1.com/proxy' from='s_5hu3 at xp.org1.com/e6fa64abH' id='m684N-29-proxy' type='set'><jingle xmlns='urn:xmpp:jingle:1' action='session-initiate' initiator='shrikant at test.org1.com/55af2b3a2c743297' sid='905b30651865'><content name='audio' creator='initiator'><description xmlns='urn:xmpp:jingle:apps:rtp:1' media='audio'><payload-type channels='1' id='107' name='opus' clockrate='32000'/><payload-type channels='1' id='101' name='telephone-event' clockrate='8000'/></description><encryption/><transport xmlns='urn:xmpp:jingle:transports:ice-udp:1'><candidate foundation='1' protocol='udp' network='0' generation='0' ip='10.170.5.10' component='1' id='0' priority='2130706431' type='host' port='21000'/></transport></content></jingle></iq>
> --
> 2014-08-27T14:28:40.138685+05:30 [sylk-server 32319]: SENDING: Packet 59, +0:08:58.821138
> <iq to='s_5hu3 at xp.org1.com/e6fa64abH' from='s_5hu3 at sylk.org1.com/proxy' id='m684N-29-proxy' type='result'/>
> --
> 2014-08-27T14:28:40.141242+05:30 [sylk-server 32319]: SENDING: Packet 60, +0:08:58.823695
> <iq to='s_5hu3 at xp.org1.com/e6fa64abH' from='s_5hu3 at sylk.org1.com/proxy' id='H_9' type='set'><jingle xmlns='urn:xmpp:jingle:1' action='session-terminate' initiator='s_5hu3 at sylk.org1.com/proxy' responder='s_5hu3 at xp.org1.com/e6fa64abH' sid='905b30651865'><reason><unsupported-applications/></reason></jingle></iq>
> 
> 
> Thank you.
> 
> -- 
> Regards,
> Shrikant U Hallur
> Mob: 9845274372
> _______________________________________________
> SIPBeyondVoIP mailing list
> SIPBeyondVoIP at lists.ag-projects.com
> http://lists.ag-projects.com/mailman/listinfo/sipbeyondvoip

--
Saúl Ibarra Corretgé
AG Projects



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