[asterisk-users] record individual callers in confbridge

[adolson]

On Mon, Mar 21, 2011 at 8:33 PM, Neeraj Chand <Neeraj.Chand at ocis.com.au>
wrote:
> While you're testing, capture iax2 debug info as well as that may point to
> other factors/issues.
>
> Possible fixes:
> File conversion:
> Yes asterisk can do the conversion
> File convert xyz.ulaw xyz.wav
> As long as you selected wav format in the initial build.
> Timing module for iax:
> Check your modules directory to see which timing sources you have
installed.
> Res_pthread, res_timerfd and dahdi_dummy would be located there.
> Move res_pthread and res_timerfd(if it exists) out of the modules
directory
> and restart * to force dahdi dummy.

Hi again,

I tried recording a podcast a couple days ago. I recorded in ulaw format,
and converted to wav afterwards, as you said. Our session ran over double
the length they usually do, over 3 hours. The sync is much better than my
first tests, and that is with the jitter buffer enabled - or at least, I
believe it is - I saw this output:

*CLI> iax2 show channels
Channel               Peer             Username    ID (Lo/Rem)  Seq (Tx/Rx)
 Lag      Jitter  JitBuf  Format  FirstMsg    LastMsg
IAX2/tayler-129       70.xx.xx.169     tayler      00129/25402  00048/00048
 00075ms  0065ms  0119ms  ulaw    Rx:NEW      Rx:ACK
IAX2/josh-346         216.xx.xx.2    josh        00346/21060  00138/00175
 00088ms  0069ms  0114ms  ulaw    Rx:NEW      Tx:ACK
IAX2/dana-1985        66.xx.xx.7      dana        01985/21748  00013/00043
 00082ms  0005ms  0079ms  ulaw    Rx:NEW      Tx:ACK
3 active IAX channels
*CLI> Resyncing the jb. last_delay 67, this delay 2079, threshold 1126, new
offset -2079
Resyncing the jb. last_delay -189, this delay 1097, threshold 1136, new
offset -3176

However, the sync goes out of sync slowly. I recorded both in and out
channels for all three participants, and even the pairs don't match up
properly. System load was around 0-0.01 the whole time, according to top.
Now, for the first hour or so, the sync was fairly OK (only minor adjustment
needed), but it drifts after that and I need to adjust more frequently in
Audacity.

I am not sure which timing modules I am using. I tried to find the one you
mentioned:

$ sudo find / | grep -i dahdi_dummy | wc -l
0

I figure this is because I compiled Asterisk from source (because I had
originally planned to use wideband codec but couldn't find any
cross-platform IAX client with wideband support). Is there a way to tell
which timer module is in use, or which I compiled in? If I specify in
modules.conf which to noload and which to load, would that do the trick (and
does that even work when compiled from scratch?). I can always recompile,
and I still have my source tree. I also found my old Digium card (it's
around 6 years old).

Thanks for your help.

Dana
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20110325/0e094c23/attachment.htm>