[asterisk-users] 0005162: RTP Packetization : Few questions

[Dan Austin]

Is autoframing set to yes in the [general] section?  A current
limitation in the code is that a global autoframing will 
override a user/peer setting.

Dan 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of yusuf
Sent: Friday, September 08, 2006 2:26 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] 0005162: RTP Packetization : Few questions

Dan Austin wrote:
>>>2006-08-31 22:11:22 WARNING[1278]: frame.c:1072 
>>>ast_codec_pref_getsize: Framing not set for codec alaw, using 
>>>default 20
>>
>>As far as the above is concerned I have the following:
> 
> 
>>I am using Asterisk 1.2.10, patched with this patch for 1.2.10.  
>>I have 2 * boxes.  They call each other over SIP, and I have in 
>>sip.conf on both boxes
> 
> 
>>autoframing=yes
>>disallow=all
>>allow=g729:80
> 
> 
>>When A calls B, it sets ptime:80.
> 
> 
>>On B I see this:
>>We're at 192.168.0.64 port 11004
>>Adding codec 0x100 (g729) to SDP
>>Sep  7 18:16:16 WARNING[5529]: frame.c:1072 ast_codec_pref_getsize: 
>>Framing not set for codec g729, using default 20 and ptime:20
> 
> 
>>So B is setting packetization to 20, when it should be 80, and is 
>>not respecting autoframing.
> 
> 
>>I have tried this with reinvites=yes and no, and autoframing=yes and
>>no, still the same.
> 
> 
> The autoframing patch forgot to remove an earlier check for 'ptime'
> in the SDP that would cause chan_sip to ignore the ptime value.
> 
> I am working on trunk, so the line numbers may not match up, but
> near line 4748 you will should find this block of code:
> 
> } else if (!strncasecmp(a, "ptime:", (size_t) 6)) {
>                                 if (debug)
>                                         ast_verbose("Got unsupported
> a:ptime in SDP offer \n");
>                                 breakout = TRUE;
> 
> Simply comment out the breakout = TRUE; line like this.
> 
> } else if (!strncasecmp(a, "ptime:", (size_t) 6)) {
>                                 if (debug)
>                                         ast_verbose("Got unsupported
> a:ptime in SDP offer \n");
>                                 /* breakout = TRUE; */
> 
> That fixes up autoframing in my tests, if it works for you, I will
> prepare a proper patch.
> 

Hi, I will try this.  But even with autoframing=no, B still sets
ptime:20.

on B in sip.conf

[sipacket]
username=sipacket
secret=sipacket
type=friend
host=dynamic
context=default
disallow=all
allow=g729:60
;autoframing=yes
;canreinvite=no




-- 
thanks,
yusuf

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