[Freeswitch-users] Bad audio with playback application

Fri Dec 20 15:16:15 MSK 2013

Thanks Peter and Tony.

I did the dumpcap and did the packet analysis (I had the dumpcap file as
well) using wireshark and figured out that audio was processed at 5600 hz.
Later I figured out that the issue was caused as I was running on 250hz
kernel and not 1000hz kernel. I have changed my kernel to 1000hz now. I am
still now sure whether this will solve the problem or not.

Is there any way I can monitor the call quality in future in automated way?
We heavily rely on nagios of all the other monitoring. If there is any way
we can alert on audio call quality using that, it will be really great. I
have checked the voipmonitor, but that is also not giving the values of
"clock skew" and the "clock drift" which was the actual cause my latency
and call quality problem respectively.

On Wed, Dec 18, 2013 at 1:39 PM, Peter Olsson <peter at olssononline.se> wrote:

> I believe you already have gotten an answer about this from Tony. As
> stated in an earlier reply from him:
>
> "As I already explained.  When timer-name set to none, it does blocking
> reads on the audio vs timed ones.  If the other end has a skew in clock
> freq with the FS then it will timeout erroneously.  Having blocking reads
> ensures you only read audio when there is actually some there.  Basically
> this timer-name set to none makes FS behave just like asterisk does by
> default.
>
> Keep in mind we do not support virtual servers beyond friendly advice
> because it quickly turns into time-consuming project to help people
> configure their virtual envs.
>
> The basic idea is, unless you are using the high yield cpu version of ec2,
> you can have timing issues at any time because the EC2 will steal the cpu
> at will.
>
> You should probably get some pcaps and look at the deltas and timestamps
> on each side of the call."
>
>
>
> 2013/12/18 Ashwin Jain <ashwinrkjain at gmail.com>
>
>> It is running on Amazon EC2.
>>
>>
>> On Wed, Dec 18, 2013 at 1:12 PM, Peter Olsson <peter at olssononline.se>wrote:
>>
>>> If soft timer is causing issues, you probably have timing issues in your
>>> platform. Are you running on a VM, or is this a real machine?
>>>
>>>
>>> 2013/12/17 Ashwin Jain <ashwinrkjain at gmail.com>
>>>
>>>> Changing clock to soft is causing call latency issues. Is there any
>>>> other way? It works well with Asterisk with no timer.
>>>>
>>>>
>>>> On Tue, Dec 17, 2013 at 2:39 PM, Peter Olsson <peter at olssononline.se>wrote:
>>>>
>>>>> Well, playback without a timer won't work for you, so stick to the
>>>>> soft timer.
>>>>>
>>>>>
>>>>> 2013/12/17 Ashwin Jain <ashwinrkjain at gmail.com>
>>>>>
>>>>>> It is stored locally.
>>>>>> It works fine with "soft" timer (using this we had call latency
>>>>>> issues), but have this issue when I use "none" as rtp-timer-name.
>>>>>>
>>>>>>
>>>>>> On Tue, Dec 17, 2013 at 10:00 AM, Ali Pey <alipey at gmail.com> wrote:
>>>>>>
>>>>>>> Is the welcome message stored locally or is it somewhere on NAS?
>>>>>>>
>>>>>>> Regards,
>>>>>>> Ali Pey
>>>>>>>
>>>>>>>
>>>>>>> On Sun, Dec 15, 2013 at 1:42 AM, Ashwin Jain <ashwinrkjain at gmail.com
>>>>>>> > wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> We are facing issues with the bad audio quality (audio is sounding
>>>>>>>> like its recorded underwater) only for the *playback application*.
>>>>>>>> There is no issue with the audio call quality (after bridging).
>>>>>>>>
>>>>>>>> Audio file used with playback application is recorded at 8khz with
>>>>>>>> 16 bits/sample and 1 channel.
>>>>>>>>
>>>>>>>> Following is the pseudo dialplan:
>>>>>>>> 1. Call comes on freeswitch server.
>>>>>>>> 2. Call answered.
>>>>>>>> 3. Query database to identify destination
>>>>>>>> 4. Play a welcome message audio (using playback application)
>>>>>>>> 5. Start call recording
>>>>>>>> 6. Bridge the call
>>>>>>>>
>>>>>>>> In step 4, we are facing this issue.
>>>>>>>> --
>>>>>>>> Thanks and Regards,
>>>>>>>> Ashwin Jain
>>>>>>>> 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
>>>>>>>>
>>>>>>>> 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:
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>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> 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
>>>>>>
>>>>>> 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
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>>>>> 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
>>>>
>>>> FreeSWITCH-users mailing list
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>>>> UNSUBSCRIBE:
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>>>> 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
>>>
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>>> 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
>>
>> 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
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>
>

-- 
Thanks and Regards,
Ashwin Jain
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