[hydra-dev] RTP Stack Choice

[Tim Panton]

On 11 Aug 2010, at 15:22, Olle E. Johansson wrote:

> 
> 11 aug 2010 kl. 16.10 skrev Joshua Colp:
> 
>> Hello all,
>> 
>> It's approaching the time where we need to choose an RTP stack for Hydra. As was previously
>> mentioned in response to comments about the SIP stack this is simply the one that will be
>> included and that resources will be put against. Since we have our defined interfaces there will
>> be nothing to stop others from replacing it.
>> 
>> To help facilitate this I've done some more research into using pjmedia for RTP and transport.
>> After comparing it against the other RTP stacks I think it is our best option from a features,
>> licensing, and future development perspective so I'd like to put forward the recommendation
>> to use it.
>> 
>> Does anyone have any qualms with it?
> 
> There are not many RTP "stacks" out there. Seems like people generally think "this is simple
> so I can hack this together".

That was _exactly_ what I was thinking :-)
Actually I think it _is_ simple enough to be worth the advantages of rolling our own.
RTP is going to be the most performance sensitive part of Hydra (and remember we
want it to scale massively). 
I imagine ICE will put some interesting threading requirements in the mix, so
it might actually be useful to have this in our own hands.

> 
> I need to check pjmedia rtcp support before I say anything about it. For the rest of RTP, I fully trust the 
> decision of the RTP master, Mr Colp. I had some issues with RTCP with PJsip phones and they all
> blamed pjmedia when I contacted them...

Also it may be easier to instrument a ground-up stack than to enhance an old one.


T.

> 
> /O
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Tim Panton - Web/VoIP consultant and implementor
www.westhawk.co.uk