[asterisk-bugs] [Asterisk 0016916]: Adaptive jitterbuffer causes 30 seconds of no audio.

[Asterisk Bug Tracker]

The following issue has been SUBMITTED. 
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https://issues.asterisk.org/view.php?id=16916 
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Reported By:                Artem
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16916
Category:                   Core/Jitterbuffer
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.2.4 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-02-26 12:05 CST
Last Modified:              2010-02-26 12:05 CST
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Summary:                    Adaptive jitterbuffer causes 30 seconds of no audio.
Description: 
Hello,

the adaptive jitterbuffer is broken in asterisk 1.6.x.x. When enablening
it somewhere, there will be no audio for 30 seconds on the side that has
jitterbuffer enabled for receiving. After 30 seconds the audio just start
as if there were nothing.

This problem does not exist when using jbimpl=fixed.

Here is my current setup:

chan_sccp-b (w/jitterbuffer) <----> Asterisk <----> chan_sip <------ IP
-------> chan_sip <----> Asterisk <----> Playback ("Audiofile")


Jitterbuffer is enabled in chan_sccp-b to dejitter audio comming from the
other asterisk server. (It has nothing to do with chan_sccp-b. The issue
also happends when enableling jitterbuffer in other channel drivers.)

This problem does not exist in asterisk-1.4.x.

sccp.conf:
jbenable=yes
jbforce=yes
jbmaxsize=500
jbresyncthreshold=2000
jbimpl=adaptive
jblog=no

Changing the values to jbmaxsize=50, jbresyncthreshold=200 has no
influene. The audio is alway not transmitted for 30 seconds.
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Issue History 
Date Modified    Username       Field                    Change               
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2010-02-26 12:05 Artem          Asterisk Version          => 1.6.2.4         
2010-02-26 12:05 Artem          Regression                => No              
2010-02-26 12:05 Artem          SVN Branch (only for SVN checkouts, not tarball
releases) => N/A             
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