[asterisk-users] meetme and jitterbuffer

nakaji nakaji at 02.246.ne.jp
Wed May 12 09:41:22 CDT 2010


hi all.

When I use conference call, my setting about jitterbuffer on "sip.conf" 
doesn't work.

### sip.conf #####
jbenable = yes
jbforce = yes
jbmaxsize = 100
jbresyncthreshold = 1000
jbimpl = fixed
###############

And I understood how to be effective jitterbuffer on conference call.
I have to use " nj option" in extention.

Is this right ?


Because of non-effective setting on sip.conf, I can't change length of the 
jitterbuffer.
When I use conference call, the delay of conversation is about 210 ms.
It's too big delay.

In  " fixedjitterbuffer.h ",

########################
/* defaults */
#define FIXED_JB_SIZE_DEFAULT 200
#define FIXED_JB_RESYNCH_THRESHOLD_DEFAULT 1000
########################

This "FIXED_JB_SIZE_DEFAULT 200 "  causes  210 ms delay.
If I change this to 100, the delay was about 110 on conference call.

Finally if I want to change the length of jitterbuffer on conference call,
I have to change source code every time.
It's only way.

Is this right ?

I think this is too inconvenient.

thx.
-------------
nakaji













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