[SOLVED] Determine whether a channel was bridged

Asterisk Asterisk Support
1

Hi. In a hangup handler, is there a way to determine whether a channel was ever bridged? BRIDGEPEER variable is cleared by this point.

I need this because Asterisk creates empty recording files even if MixMonitor was started with “b” option. I want to delete recordings for channels that were not bridged.

2

You could have your MONITOR_EXEC script remove empty files.

3

Does MONITOR_EXEC work with MixMonitor? I don’t see it in docs.

4

You can pass a command to MixMonitor according to the docs for 13.

https://wiki.asterisk.org/wiki/display/AST/Asterisk+13+Application_MixMonitor

I got confused with MONITOR_EXEC that’s for regular monitor sorry.

5

Hm, but again, how will I know if the channel was bridged? In most cases, MixMonitor will end as a result of channel being hung up.

6

Right, but you can test the state of the file in the script you execute from MixMonitor.

This is just an example of testing the file in bash.


#!/bin/bash
FILENAME=$1
SRCDIR=/var/spool/asterisk/monitor
if [[ -s $ASTMONDIR/$FILENAME.wav ]]
        then
                echo "File exists and is not empty";
        else
                echo "File is empty";
7

The problem is, the file is not zero-size. Asterisk writes something, probably file headers, and the content certainly depends on the audio format. Examining that is not trivial. There has to be an easier solution.

8

I’ve resolved it by marking both channels in pre-bridge handler (AEL code):

bridged=1;
MASTER_CHANNEL(bridged)=1;

Now I can test the bridged variable in hangup handler of either channel.

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