Re: [XCON] Common-data-model -- video-layout

["Krishna Prasad Kalluri" <krishna.prasad.kalluri at ericsson.com>]

Hi Lorenzo,

How do define a layout per video stream? As I understood its possible to
define a video layout per mix (conference)

Regards
Krishna 

-----Original Message-----
From: Lorenzo Miniero [mailto:lorenzo.miniero at unina.it] 
Sent: den 24 november 2008 12:07
To: Krishna Prasad Kalluri
Cc: xcon at ietf.org
Subject: Re: [XCON] Common-data-model -- video-layout

Hi Krishna,

you can still achieve what you want, by defining more video output
streams with different layouts, and attaching participants to them
according to your needs (e.g. a lightweight stream for all mobile users,
and a heavier stream for others). It's not as straightforward as having
a custom layout for each user, but it's compliant, for instance, with
how videomixing is currently handled in the MEDIACTRL mixer package.

Lorenzo


Quoting Krishna Prasad Kalluri <krishna.prasad.kalluri at ericsson.com>:

> Hi,
>
> I have a question related to the video-layout element in XCON common 
> data model.
>
> Question 1:
>
> The video-layout element is defined in the conference description
level.
> So one video conference will have only one layout. That means
>
> 1) From the conference mixer point of view its only one output mix.
> 2) All participants view the same layout.
>
> Is my understanding correct? If so the video-layout description in 
> common-data-model is giving a different impression. From the text 
> below I got an impression that each participant can have different
layout.
>
> The <video-layout> element is used in conjunction with a video stream 
> to specify how the video streams (of participants) are viewed by each 
> participant.  Only one layout type can be specified for each output 
> stream
>
> Question 2:
>
> In the data model is it possible to include video-layout per 
> participant. May be its correct to say per endpoint. If the display of

> endpoint is small (mobile phone) a participant can select a smaller 
> layout (Eg: dual-view) . If the endpoint display is large (pc) a 
> participant can select a bigger layout. Of course this causes more 
> processing in the mixer to generate several output mixes.
>
> In H.248.19 it is possible to specify one layout type per termination.
>
> So in the data model I like to propose to add
>
> Users->user->endpoint->controls->video-layout
>
> Any way the summary is I like to see layout per participant (endpoint)
>
> Regards
> Krishna
>
>



--
Lorenzo Miniero, Junior Researcher
Dipartimento di Informatica e Sistemistica Universita' degli Studi di
Napoli "Federico II"
Via Claudio 21 -- 80125 Napoli (Italy)
Phone: +390817683821 - Fax: +390817683816
Email: lorenzo.miniero at unina.it
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