[Asterisk-Dev] Chan_sip: video capabilities, call bandwidthand RTCP

[Matt Riddell]

John Martin wrote:

> There are a number of far-eastern video phones that do this sort of
> thing.
> If you send them 4CIF at 30fps then the get a bit upset. The
> manufacturers
> say - well the capability exchange is in there for a reason. They will
> fix
> the problem but over a period of many months.

Heh, if only I could say I don't know what you mean!

> I guess I was being a bit harsh - we also have Interactive Video
> Response
> and clips working but it gets a bit problematic with Asterisk and low
> bandwidth callers - and don't get me started on rate control for 
> pre-recorded video clips :-) We've done a number of H.320 and H.323
> IVideoR systems in the past and they can get very complicated as I'm
> sure
> you're aware.

Indeed.

>>Giz a patch then bazza!
> 
> I'll work on that over then next day or so.

Cool man!!

> minvideobandwidth=1440
> maxvideobandwidth=3840
> disallow=4CIF
> disallow=16CIF
> allow=CIF
> allow=QCIF
> allow=h263p
> allow=4CIF2
> allow=h263
> allow=4CIF2
> resolution=CIF
> allow=h261
> 
> And then what happens with H.264 and you want to specify a custom
> portrait
> format like the Motorola Ojo does? You'd need syntax like:
> 
> allow=288x352  ???
> framerate=120  ???

Yeah, I'm not sure about this one.


> How do I find out more about this? I've been reading the posts,
> bugs.digium and
> everything else I can think of for the last 9 months and haven't spotted
> this.

http://www.sineapps.com/news.php?rssid=1068

-- 
Cheers,

Matt Riddell
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