[Asterisk-Users] How to set the jitter buffer

[Andres]

Rich Adamson wrote:

>Andres,
>
>Thanks, I applied the changes and simply dialed the * demo site. Seems to have
>totally corrected the problem, although hitting that site is probably not all
>that great of a test. 
>
>Is this something that will changed in cvs / stable?
>
>  
>
This is the way it was **before** :)

We suggested to Mark that he should leave it like this instead of trying 
to "carry over" the Timestamp which is way more complicated.  So far I 
don't think he liked our suggestion.  Maybe if enough people complain he 
will revert to the old way.  Look at this bug for our discussion on the 
subject:
http://bugs.digium.com/bug_view_page.php?bug_id=0001260


>What's the change actually doing (I'm not good at reading C code)?
>
>Rich
>
>
>  
>
>>>. As a result, both
>>>ends of the c7960 -> iax connection hear choppy audio and audio drop outs.
>>>I'm trying to use ethereal decodes to identify the issue, however its rather
>>>tough to correlate the audio problems to exact packets within a trace of
>>>thousands of packets. (My hearing verses finger response time is not as
>>>quick as packet sniffers.)
>>>
>>> 
>>>
>>>      
>>>
>>Rich,
>>
>>If you are still testing out the Cisco phones give the following rtp.c 
>>modification a try.   It basically has the "Timestamp" carryover stuff 
>>commented out.  Asterisk thus generates evenly spaced out timestamps.  
>>(also note the 2560 change).  My hunch is this will fix your Cisco 
>>issues.  Let me know please.
>>
>>Andres
>>
>>
>>                /* Re-calculate last TS */
>>                rtp->lastts = rtp->lastts + ms * 8;
>>  /*              if (!f->delivery.tv_sec && !f->delivery.tv_usec) { */
>>                        /* If this isn't an absolute delivery time, 
>>Check if it is close to our prediction,
>>                           and if so, go with our prediction */
>>                        if (abs(rtp->lastts - pred) < 2560)
>>                                rtp->lastts = pred;
>>                        else
>>                                ast_log(LOG_DEBUG, "Difference is %d, ms 
>>is %d\n", abs(rtp->lastts - pred), ms);
>>/*                }*/
>>
>>    
>>
>>>Rich
>>>
>>>
>>>_______________________________________________
>>>Asterisk-Users mailing list
>>>Asterisk-Users at lists.digium.com
>>>http://lists.digium.com/mailman/listinfo/asterisk-users
>>>To UNSUBSCRIBE or update options visit:
>>>  http://lists.digium.com/mailman/listinfo/asterisk-users
>>>
>>> 
>>>
>>>      
>>>
>>_______________________________________________
>>Asterisk-Users mailing list
>>Asterisk-Users at lists.digium.com
>>http://lists.digium.com/mailman/listinfo/asterisk-users
>>To UNSUBSCRIBE or update options visit:
>>   http://lists.digium.com/mailman/listinfo/asterisk-users
>>    
>>
>
>---------------End of Original Message-----------------
>
>
>_______________________________________________
>Asterisk-Users mailing list
>Asterisk-Users at lists.digium.com
>http://lists.digium.com/mailman/listinfo/asterisk-users
>To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>
>  
>