[Freeswitch-users] is there a way to validate RTP is flowing after bridging two channels?

[Dave Horton]

Perfect, thanks!
On Jan 18, 2016, at 6:05 AM, Steven Ayre <steveayre at gmail.com> wrote:

If you need to do it within FreeSWITCH (eg from a script), execute the uuid_set_media_stats api. This will set a number of variables that you can then read which'll reflect a number of RTP statistics. This will include the number of RTP frames/packets/bytes going in and out of the server for that call. That'll let you spot if a channel isn't receiving any RTP packets.

To see what variables are set see the add_stat lines in src/switch_core_media.c:1470 set_stats(), the names will be prefixed between what appears in the code and the variable set for example "in_raw_bytes" => ${rtp_audio_in_raw_bytes}.


On 18 January 2016 at 00:58, Dave Horton <dave at dchorton.com <mailto:dave at dchorton.com>> wrote:
Well, my issue is that ‘complete silence’ could mean no RTP packets at all, or it could mean RTP packets arriving with all zeros, and I need to distinguish between the two scenarios.  I read the recent issue regarding detecting speaker events in a conference to determine silence, so I suppose I instead of bridging I could put the two legs into conference and look for the lack of a ‘start talking’ event within some number of seconds.  But I would prefer to sick with bridging the legs if possible.  I am unclear about how the recording is going to look in the case where there is no RTP coming in, and whether I could really inspect the recording to know for sure whether or not I am receiving packets….

Dave



On Jan 17, 2016, at 5:29 PM, Stanislav Sinyagin <ssinyagin at gmail.com <mailto:ssinyagin at gmail.com>> wrote:

you can, for example, start a recording within a running session, run it for 10 seconds, and then build a histogram using SOX. You would then easily distinguish a complete silence from speech.

Also at the end of a call, you can get the RTP statistics in channel variables before it gets destroyed, so you can extract the number of RTP packets received.



On Sun, Jan 17, 2016 at 11:17 PM, Dave Horton <dave at dchorton.com <mailto:dave at dchorton.com>> wrote:
I have a need to bridge two channels together and then somehow verify that I am getting RTP packets from both directions.  The need stems from a desire to detect a one-way audio situation in rare nat’ed scenarios where signaling gets established but one party may have restrictive firewall rules preventing his/her RTP stream from reaching the FS endpoint.  Any ideas?
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