have you tried the session method specifically for recording files?

https://freeswitch.org/confluence/display/FREESWITCH/Lua+API+Reference#LuaAPIReference-session:recordFile

or if that doesn't work, maybe this:

local new_session = freeswitch.Session("someoriginatestring", session);
uuid = new_session:get_uuid()
api = freeswitch.API()
reply = api:executeString("uuid_record " .. uuid .. " start " .. filepath)

On Fri, Jan 29, 2016 at 1:31 PM, Oz Mortimer <omortimer@gmail.com> wrote:
since this is a single left call try setting record_stereo to false - https://wiki.freeswitch.org/wiki/Variable_RECORD_STEREO
I'm probably wrong, but worth a shot!

On 29 Jan 2016, at 19:53, Leonardo Ribeiro <llribeiro90@gmail.com> wrote:

Hello Guys,

Any idea?
I could not evolve this yet...

Thank you,

2016-01-28 18:52 GMT-02:00 Leonardo Lima Ribeiro <llribeiro90@gmail.com>:
Hello all,

I’m trying to record an IVR using my gateway to do the outbound call in my luascript:

local new_session = freeswitch.Session("[origination_caller_id_name=‘987654321',origination_caller_id_number=‘987654321']sofia/gateway/MY_GATEWAY/3157244022", session);
new_session:execute("record_session","/usr/local/freeswitch/recordings/myrecording.wav")
new_session:sleep("10000")
new_session:hangup()

So in the above script I just call to the Bank Of America as an example and try to record the first 10 seconds of the call in the recordings path.

The problem is that I have an empty recording file.. Why?

The funny thing is: if I add this command after the record_session command: 
new_session:streamFile("voicemail/vm-goodbye.wav”);

And then this is the entire new script:
local new_session = freeswitch.Session("[origination_caller_id_name=‘987654321',origination_caller_id_number=‘987654321']sofia/gateway/MY_GATEWAY/3157244022", session);
new_session:execute("record_session","/usr/local/freeswitch/recordings/myrecording.wav”)
new_session:streamFile("voicemail/vm-goodbye.wav”);
new_session:sleep("10000")
new_session:hangup()

I can hear the Good Bye sound from my script and then hear the Bank of America IVR.

I just don’t understand why the record works if I play a sound in our side and the record does not work if I don’t play any sound.

Do you know what’s happening? How can I solve this?

Thank you!




--
Leonardo Lima Ribeiro

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