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Summary:ASTERISK-09762: RTCP NTP Skew Detected
Reporter:Mercestes D'Moriarty (mercestes)Labels:
Date Opened:2007-06-26 15:45:42Date Closed:2007-07-06 19:18:18
Priority:MinorRegression?No
Status:Closed/CompleteComponents:Core/General
Versions:Frequency of
Occurrence
Related
Issues:
Environment:Attachments:( 0) output.txt
Description:  -- <SIP/100-081dccd8> Playing 'vm-password' (language 'en')
   -- <SIP/100-081dccd8> Playing 'vm-youhave' (language 'en')
   -- <SIP/100-081dccd8> Playing 'vm-no' (language 'en')
   -- <SIP/100-081dccd8> Playing 'vm-messages' (language 'en')
   -- <SIP/100-081dccd8> Playing 'vm-opts' (language 'en')
Internal RTCP NTP clock skew detected: lsr=4181976811, now=4182156661, dlsr=196500 (2:998ms), diff=16650
=================================================

 RTCP NTP clock skew detected messages showing in the CLI on Asterisk 1.4.5.  I've seen this on 3 systems now.  Full debug output is attached as output.txt.   Seems to be on SIP related calls.
Comments:By: Christoph Stadlmann (cstadlmann) 2007-06-27 05:53:29

Problem also in SVN-branch-1.4-r72042 when using command 'Playback':

   -- Executing [9000@extensions-queue-203500:5] Playback("SIP/v203500aa-b6a00518", "custom/ringtone_10ms") in new stack
   -- <SIP/v203500aa-b6a00518> Playing 'custom/ringtone_10ms' (language 'de')
Internal RTCP NTP clock skew detected: lsr=2198315295, now=2199625969, dlsr=1310720 (20:000ms), diff=46
Internal RTCP NTP clock skew detected: lsr=2198315295, now=2199953660, dlsr=1638400 (25:000ms), diff=35
Internal RTCP NTP clock skew detected: lsr=2198315295, now=2200281245, dlsr=1966014 (29:998ms), diff=64

Also, no audio is passed to the client, and although the wav file is only 10ms long, 'Playback' never finishes.
Should I open a seperate bug?

By: Russell Bryant (russell) 2007-06-27 11:37:47

I have fixed the code so this message will not get printed when it shouldn't be .... 1.4 and trunk revisions 72112 and 72113