[Freeswitch-users] Recording G729

[Ashwin Jain]

Hi Kees,

I am facing the exact same problem (audio is out of sync). Please let me
know if you figure out any solution. I am running FreeSwitch 1.2.5.3 on
ubuntu installation running on EC2 medium instance. It's a very critical
problem for us as its affecting our customers.

You can try to set "sip_jitter_buffer_during_bridge=false", which might
solve the problem, although it didn't worked in my case.


On Tue, Nov 26, 2013 at 9:37 AM, Kees Varekamp <kees at mroffice.org> wrote:

> OK I'll try and check if that helps - although CPU really doesnt seem an
> issue. Another thought: if you run lame on the same server wouldn't it get
> a comparable cpu load anyway? Or even worse since it is batch wise?
>
> Also: even if you record to wav, and both legs are something else (eg
> g729, iLBC, whatever), would the recording transcoding not undo the
> potential benefit of not having to transcode between a- and b-leg?
>
> Thanks,
>
> Kees
>
>
> On Tue, Nov 26, 2013 at 4:09 PM, Yuri Ritvin <yuri.ritvin at gmail.com>wrote:
>
>> You'll better record in a standard WAV format and will convert it into
>> MP3 with lame (you need to install lame, of course, onto your server) thus
>> off-loading some burden from the freeswitch processing. Say you record WAV
>> files into a folder /opt/freeswitch/sounds/recorded and wanna have MP3
>> files in a folder /opt/freeswitch/sounds/recorded/mp3, then you create the
>> following script and run it via crontab every 15 minutes (or any desired
>> time interval):
>>
>> #!/bin/bash
>> cd /opt/freeswitch/sounds/recorded
>> for i in `find . -name "*.wav" -cnewer mp3|cut -d/ -f2|cut -d. -f1`
>> do
>> lame -S -h --resample 16 -b 24 $i.wav mp3/$i.mp3
>> done
>>
>>
>>
>> On Mon, Nov 25, 2013 at 9:39 PM, Kees Varekamp <kees at mroffice.org> wrote:
>>
>>> Hi all,
>>>
>>> I'm suffering from poor sound quality on my setup, using GSM on the
>>> a-leg and PCMU on the b-leg. I'm thinking it's mostly bandwidth/network
>>> related, so I'm considering switching to G729 on both legs, as that is the
>>> only compressed codec that the b-leg supports (it's a sip gateway).
>>>
>>> But a complicating factor is that the calls need to be recorded in mp3.
>>>
>>> So I have some questions that I hope someone here can answer:
>>>
>>>
>>>    - Does transcoding (for example GSM<>PCMU) negatively affect the
>>>    sound quality, even when the CPU seems to be ok with it?
>>>    - If yes, does recording 2 legs using the same codec (say G729) to a
>>>    different sound format (say mp3) have the same (negative) effect?
>>>    - When you use G729 on both legs (using mod_com_g729), it is even
>>>    possible to record to mp3?
>>>
>>>
>>> Thank you,
>>>
>>> Kees
>>>
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
>>>
>>> Official FreeSWITCH Sites
>>> http://www.freeswitch.org
>>> http://wiki.freeswitch.org
>>> http://www.cluecon.com
>>>
>>> FreeSWITCH-users mailing list
>>> FreeSWITCH-users at lists.freeswitch.org
>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>> http://www.freeswitch.org
>>>
>>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>>
>>
>
>
> --
> Kees Varekamp
> *MROffice Director*
> 44 Castleford street, 0604, Auckland, New Zealand
> Phone: +6492821656
> Skype: kees.mroffice
> Web: mro <http://mro-global.com>ffice.org
>
> *MROffice - Meeting Market Research Needs*
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
>


-- 
Thanks and Regards,
Ashwin Jain
Director (Engineering)
MetroGuild
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20131126/81e677d1/attachment-0001.html