[Freeswitch-users] Recording G729

[Kees Varekamp]

Hi Ashwin,

I think you're on the wrong thread - but fyi it looks like I finally nailed
this problem by changing the vmware timer settings to use the hardware
clock. Let me know how you get on.


On Tue, Nov 26, 2013 at 6:45 PM, Ashwin Jain <ashwinrkjain at gmail.com> wrote:

> 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
>>>>
>>>> 
>>>> 
>>>>
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>>>>
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
>>>
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>>>
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>>
>>
>> --
>> 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
>
> _________________________________________________________________________
> 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
>
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>
>


-- 
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*
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