[Freeswitch-users] Call recording

Thu Jun 15 09:19:09 UTC 2017

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

> Hello,
>
>
>
> 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:
>
>
>
> session:answer()
>
> while(session:ready() == true) do
>
>    test = session:recordFile("/usr/local/freeswitch/recordings/test.wav",
> 18000, 0, 300)
>
>    session:setAutoHangup(false)
>
>    session:hangup()
>
> end
>
>
>
> This script will be invoked by the following dialplan:
>
>
>
> <extension name="Recording">
>
>       <condition field="destination_number" expression=".*">
>
>             <action application="lua" data="record.lua"/>
>
>       </condition>
>
> </extension>
>
>
>
> 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...

https://freeswitch.org/confluence/display/FREESWITCH/mod_dptools:+record_session

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

session:setAutoHangup(false)

and after that you

session:hangup()

?

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,

-giovanni

>
>
> Many thanks in advance.
>
>
>
> Best regards,
>
>
>
> Sven Uszpelkat
> Departamento I+D
> Comunycarse Network Consultants, S.L.
>
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-- 

Sincerely,

Giovanni Maruzzelli
OpenTelecom.IT
cell: +39 347 266 56 18
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