Pjlib on Symbian

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2009/4/2 George Evi <george.evi at ctcinc.ca>

>  Hi Benny,
>
>
>
> I activate the log in my project (PJ_LOG()) and used the function
> ?log_call_dump()*? *to dump the statistics at the end of a call.
>
> I got these statistics:
>
>
Great! We love logs and statistics! :)


>
>
> --end msg--State changed from Null to Calling, event=TX_MSGTransaction
> tsx0x732e8c state changed to Calling
>
>   [CONFIRMED] To: sip:5148403000 at sip6.van.netvoice.ca<sip%3A5148403000 at sip6.van.netvoice.ca>
> ;tag=as5b69601c
>
>     Call time: 00h:01m:56s, 1st res in 3542 ms, conn in 5824ms
>
>     SRTP status: Not active Crypto-suite: (null)
>
>     #0 PCMU @8KHz, sendrecv, peer=64.34.49.82:19122
>
>        RX pt=0, stat last update: 00h:00m:00.601s ago
>
>           total 5.7Kpkt 924.8KB (1.15MB +IP hdr) @avg=62.3Kbps/77.9Kbps
>
>           pkt loss=143 (2.4%), discrd=1 (0.0%), dup=0 (0.0%), reord=1
> (0.0%)
>
>                 (msec)    min     avg     max     last    dev
>
>           loss period:  20.000 178.750 940.000 100.000  63.638
>
>           jitter     : -  0.001  11.737 579.000   0.750   8.775
>
>        TX pt=0, ptime=20ms, stat last update: 00h:00m:03.680s ago
>
>           total 5.7Kpkt 906.4KB (1.13MB +IP hdr) @avg 61.1Kbps/76.5Kbps
>
>           pkt loss=2 (0.0%), dup=0 (0.0%), reorder=0 (0.0%)
>
>                 (msec)    min     avg     max     last    dev
>
>           loss period:  40.000  40.000  40.000  40.000   0.000
>
>           jitter     : 193.000 193.000 193.000 193.000   0.000
>
>       RTT msec       :  92.000 128.637 332.000 101.000  21.526
>
> Processing incoming message: Response msg 200/BYE/cseq=18255
> (rdata0x71e65c)RX 510 bytes Response msg 200/BYE/cseq=18255 (rdata0x71e65c)
> from UDP 64.34.49.82:5060:
>
> SIP/2.0 200 OK
>
>
>
> I also read the ?Understanding Media Flow? document and I have a (beginner)
> question.
>
> In the TX section we have a jitter line but in the Media Flow diagram there
> is no Jitter Buffer for packet transmission, what represents this line?
>

We get these values from the RTCP report sent by the remote peer. If remote
peer doesn't support RTCP, we would not get these stats of course.


> And also why in the same section the loss period and jitter buffer values
> are the same for all statistics colons?
>
>
>
It's probably because it's only got one RTCP report? In this case then the
min/avg/max values would be the same, isn't it?

cheers
 Benny




> Thanks,
>
> George.
>
>
>  ------------------------------
>
> *From:* pjsip-bounces at lists.pjsip.org [mailto:
> pjsip-bounces at lists.pjsip.org] *On Behalf Of *Benny Prijono
> *Sent:* Wednesday, March 25, 2009 3:56 AM
>
> *To:* pjsip list
> *Subject:* Re: [pjsip] Pjlib on Symbian
>
>
>
> 2009/3/24 George Evi <george.evi at ctcinc.ca>
>
>  Hi Benny,
>
>
>
> I update my application with the latest version the ?trunk pjproject- 1.1?
> and continue to test on Nokia E61.
>
>
>
> As you suggested I changed the codec priorities in a way that GSM had
> highest priority (in function ?*pjsua_media_subsys_init**? priority value
> = **PJMEDIA_CODEC_PRIO_NORMAL** +4 (132)*). The sound was acceptable on
> the caller side but on the callee side continue to be stuttered, disrupted
> and instable.
>
>
> Hi George,
>
> In that case, I would probably suggest to try to use different peer for the
> testing (pjsua running on desktop would be a good candidate :) ). And make
> sure the audio doesn't get routed through the server or otherwise this
> wouldn't make any difference. You can call directly to the device's IP
> address to make sure.
>
>
>
>
> Also I tried the others codecs (iLBC, Speex/8000 and Speex/16000) in the
> same way but didn?t see any improvements.
>
>
>
>  iLBC and Speex/16000 is definitely out of question. Speex/8000 is
> probably bang on the processing capability, so use it with care (e.g. only
> use release mode), and probably is not good for troubleshooting problems
> like this. And of course there is G.711, definitely a good candidate to try.
>
> cheers
>  Benny
>
>
>
>  Do you have any suggestions or ideas?
>
>
>
> We don?t want to use Nokia APS (Audio proxy Server) for the moment, because
> it needs a publisher ID.
>
>
>
> Thank you,
>
> George.
>
>
>
>
>  ------------------------------
>
> *From:* pjsip-bounces at lists.pjsip.org [mailto:
> pjsip-bounces at lists.pjsip.org] *On Behalf Of *Benny Prijono
> *Sent:* Friday, March 20, 2009 2:32 AM
>
>
> *To:* pjsip list
> *Subject:* Re: [pjsip] Pjlib on Symbian
>
>
>
> 2009/3/19 George Evi <george.evi at ctcinc.ca>
>
>  Hi Benny,
>
>
>
> Thanks for your response.
>
> The flow of sound is disrupted on both sides (caller and callee voice
> reception). You can hear the sound but the words are not completed and on
> the callee side the voice is metalique  (like a robot speech). The latest
> tests I made were done with Nokia E61 (S60 3rd edition -mr) connected
> Wi-Fi and I expected to see some improvements but voice stilled disrupted.
>
> I?m using iLBC as codec (1st priority) and UDP transport.
>
>
>
> Aha, that's probably the reason. iLBC is heavy, I don't think the device
> has enough processing power to run it [2]. Try with GSM or Speex.
>
> Alternatively, consider using APS-Direct [1], available in pjsip version
> 1.1 now downloadable from the website. APS-Direct uses handset's native
> codec and it supports iLBC, AMR, G.729, and G.711.
>
> cheers
>  Benny
>
> [1] http://trac.pjsip.org/repos/wiki/Nokia_APS_VAS_Direct
> [2] http://trac.pjsip.org/repos/wiki/PJMEDIA-MIPS
>
>
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>
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>
>
>
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