[asterisk-bugs] [JIRA] (ASTERISK-21094) MixMonitorMute mutes through stream if already slinear (e.g. Originate)

[David Woolley (JIRA)]

David Woolley created ASTERISK-21094:
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             Summary: MixMonitorMute mutes through stream if already slinear (e.g. Originate)
                 Key: ASTERISK-21094
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21094
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Applications/app_mixmonitor
    Affects Versions: 1.8.20.1
         Environment: CentOS 5.3.  VMWare.
            Reporter: David Woolley
            Severity: Minor


We backported MixMonitorMute to 1.6.1 and found a problem that, according to my code reading still exists in the 1.8 branch SVN version, namely that, if the codec is already slinear, using MixMonitorMute causes the orignal media stream to be silenced, as well as the monitored stream.

We are using MixMonitor on queues.  If the incoming call on the queue arrives from a normal channel (in our case a local channel instantiated from a normal channel), MixMonitorMute works correctly, and replaces the audio on the recording by an equivalent period of silence.

If the call on the queue is initiated by AMI Originate (again via a local channel), the through media in both directions is also replaced by equivalent silence.  For the avoidance of doubt, these are frames containing silence, not the absence of frames.

MixMonitorMute is applied in both directions.



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