[asterisk-bugs] [Asterisk 0013745]: Recordings out of sync when using chanspy

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13745 
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Reported By:                geoffs
Assigned To:                mmichelson
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Project:                    Asterisk
Issue ID:                   13745
Category:                   Applications/app_mixmonitor
Reproducibility:            sometimes
Severity:                   major
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           1.4.22 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2008-10-20 09:31 CDT
Last Modified:              2009-03-27 14:01 CDT
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Summary:                    Recordings out of sync when using chanspy
Description: 
Inbound and outbound tracks will get out of sync by several seconds when a
call is monitored using chanspy.  
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Relationships       ID      Summary
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related to          0012837 [patch] Chanspy audio is delayed or lost
related to          0011945 MixMonitor - Out Of Sync Audio With Zap...
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 (0102304) mmichelson (administrator) - 2009-03-27 14:01
 http://bugs.digium.com/view.php?id=13745#c102304 
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I may have reproduced this...or at least something close to it.

I added a bunch of debugging output to my local copy of Asterisk 1.4 and
ran a test where a spy was listening to a call between two people. After
about 30 minutes, I tested and found that both channels' audio was reaching
the spy about 4-5 seconds after I actually spoke into the handset. As a
result, the spy was able to hear the conversation and understand it, but he
would hear it about 5 seconds after it was actually spoken. This seems to
differ from what was reported here, though. The reported problem was that
the two channels being listened on started to overlap after a while. I
noticed that there has been code added for issue
http://bugs.digium.com/view.php?id=13005 to address a
similar issue in MixMonitor. The fix applied there could potentially be
used for chanspy as well. I am going to upload a patch here which may help
out. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-03-27 14:01 mmichelson     Note Added: 0102304                          
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