[Freeswitch-users] session.steamFile misses DTMF event for first few seconds

[Frank @ Impact]

The calls are coming from land based lines.  Traditional POTS (not cable
company).  Caller is calling into FS and providing those DTMF.  I can
reproduce on my POTS line (3000' from CO) and there is no discernable
noise on the line. 

The call comes into the media gateway and then goes sip to FS.

I can reproduce the problem just by starting FS version from the latest
trunk.  And then I can eliminate the problem by restarting the FS
version 12790.  In both test cases, the media gateway remains constant.


-----Original Message-----
From: freeswitch-users-bounces at lists.freeswitch.org
[mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of
Alberto Escudero
Sent: Tuesday, April 27, 2010 9:08 AM
To: freeswitch-users at lists.freeswitch.org
Subject: Re: [Freeswitch-users] session.steamFile misses DTMF event for
first few seconds

How are you  receiving those DTMFs, inbound or outbound? Are those calls
coming from a mobile network (GSM). We have experienced lots of problem
with DTMF detection in noisy lines.

/aep
-- 
Stopping junk mailers is good for the environment

> I recently upgraded from FS 12790M to svn 17188.  When I did, I
noticed
> that session.streamFile behaved differently and I started having
> problems with my IVR app.
>
> With the upgraded FS, I have a problem with streamFile no firing on
the
> DTMF and calling the callback function for the first few seconds of
the
> wav file playback.  It behaves as though it does not hear the DTMFs.
If
> I wait for 2 seconds or so of the wav file and then DTMF, streamFile
> catches the DTMF and all is well.  If I key as soon as I hear the wav
> file start, streamFile just keeps playing the wav and does not call
the
> callback function.
>
> When I revert back to the previous version of FS, streamFile always
> fires the callback right away no matter how quickly I press the first
> DTMF as the wav file starts to stream out.
>
> The wave file is RIFF (little-endian) data, WAVE audio, Microsoft PCM,
> 16 bit, mono 8000 Hz
>
> The snippet of js code I am using is as follows.
>
> if(session.ready()) {
>     session.answer();
>     session.sleep(750);
>     while(session.ready()) {
>         session.sleep(500);
>         session.flushDigits(); // clear out input buffers
>
>
>
if((pin=session.streamFile(snd_prefix+"/enter-acct-numbers.wav",onlyDigi
> ts_cb,""))===false) {
>             pin=session.getDigits(pinmax,pinterm,pinwait);
>         } else {
>             pin+=session.getDigits(pinmax-1,pinterm,pinwait);
>         }
>         // more code here..
>     }
>
> Do I need to change the way I use streamFile in the later release?
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