[Freeswitch-users] Call recording

Sven Uszpelkat USZPELSV at comunycarse.com
Thu Jun 15 10:50:03 UTC 2017

Hi Giovanni,

Thank you for your response.

1.)    The code example I provided was only a fragment of the script. The actual script is doing more than just recording but we will try the dialplan approach as well.

2.)    The session:hangup was thought to leave the while loop but maybe it’s not necessary if the session is already finished or we change the while for an if. I think I copied this from another example I found.

3.)    We set the silence threshold to 0 because the documentation is not very clear how to disable the silence detection. We don’t want the recording to stop in response to a period of silence. The point is to record everything.

Best regards,

De: FreeSWITCH-users [mailto:freeswitch-users-bounces at lists.freeswitch.org] En nombre de Giovanni Maruzzelli
Enviado el: jueves, 15 de junio de 2017 11:19
Para: FreeSWITCH Users Help
Asunto: Re: [Freeswitch-users] Call recording

On 15 June 2017 at 09:49, Sven Uszpelkat <USZPELSV at comunycarse.com<mailto:USZPELSV at comunycarse.com>> wrote:

We are using FreeSWITCH as a third-party recording application, i.e. we are receiving SIP calls with the complete audio of conversations taking place on another switch and we are saving this audio to a file. To achieve this we are using a simple script similar to this:

while(session:ready() == true) do
   test = session:recordFile("/usr/local/freeswitch/recordings/test.wav", 18000, 0, 300)

This script will be invoked by the following dialplan:

<extension name="Recording">
      <condition field="destination_number" expression=".*">
            <action application="lua" data="record.lua"/>

Basically it seems to work quite well, but sometimes there are missing audio at the end of the recorded file.  Usually it’s only a few seconds, but sometimes it seems to be more. (It’s like the recording sometimes goes behind the real call and when the hangup event is received the remaining audio is discarded.)

What could be the reason for this behavior? Is there something wrong with the script or is there a better way to achieve our goal?

One first question come to my mind: why do you use a script here? A simple extension can do exactly the same, if you just want to record the session...

Anyway, if you want to use the script, why you first

and after that you



Also, you made the silence_threshold equal 0 (zero).
Have you has the same problems using a silence_threshold of, let's say, 30 (thirty), like in documentation? ( https://freeswitch.org/confluence/display/FREESWITCH/Lua+API+Reference#LuaAPIReference-session:recordFile )

Hope this helps,

Many thanks in advance.

Best regards,

Sven Uszpelkat
Departamento I+D
Comunycarse Network Consultants, S.L.

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