This is my scenario:

I have a sip client in my Mobile phone, but no video support. For a video
chat, i want to use my mobile for audio and video should be displayed in
laptop.

I was curious whether using GRUU concept, can i make both the devices to
participate in a call. Such that, my Mobile phone would carry m=audio &
a=sendrec. But Laptop, only Video - m=video, a=recvonly.


I just wonder is there any feasible way to make this scenario to work.

On Fri, Mar 19, 2010 at 4:47 PM, Iñaki Baz Castillo <[email protected]> wrote:

> 2010/3/19 Premalatha Kuppan <[email protected]>:
> > Here my main intention is to deliver audio to one device and video to
> other
> > device. Is it possible ?
>
> Hyper-exotic scenario that will never work in the real world.
>
> "Theorically" such behavior is possible if both UAS's reply 200 at the
> same time (so the forking proxy has no time enough to cancel the
> second branch when the first one has replied 200). Then the UAC would
> receive both 200 and send ACK for both, so it has two active dialogs
> at the same time.
>
> But no, this will never work. In fact, some proxies don't relay a
> second 200 (which should be relayed stateless since the INVITE
> transaction finished upon receipt of the first 200).
>
>
> I strongly recommend you looking for other more feasible approach
> (still I want to imagine why the audio should be answered by a device
> and the video by other device...).
>
> --
> Iñaki Baz Castillo
> <[email protected]>
>
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