[Freeswitch-dev] Need help: Detecting silence in an on-going call

[Navin Agarwal]

Hello Everyone,

I am working on a FreeSWITCH project where I need to detect some features
of an on-going call such as a period of silence, low volume and high
volume, and report it to the user on-the-fly.

I found a function "is_silence_frame" in "switch_ivr_async.c" which detects
if a frame is a silence frame relative to a given threshold. I tried using
that but I did not find any difference in the energy levels of frames which
were silent and ones in which someone was speaking, so I am not able to use
it.

Can someone please help me in understanding how this works or if there is
any other code or module that I can use to detect silence, low volume and
high volume in an on-going call. Basically the idea is to perform some live
analysis of a call and the above three are the ones that I could come up
with till now.

Any pointers here will be really appreciated.

Thanks,
Navin Agarwal
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-dev/attachments/20150618/72e69412/attachment-0001.html