[Opensim-dev] OpenSim Hardware Requeriments

[Chris Hart]

One option is to use SMIL to combine media feeds into one that can be displayed as media that can be played by Quicktime. Using this method, I've managed to get two webcam feeds on the same screen / prim / media texture, and also a webcam alongside slides (SMIL has some timing and transition options), but I don't know what the upper limit would be on number of streams to combine.

I tested it around 6 months ago with Veodia http://veodia.com/  (which is a re-stream service with the right encoding to be played in Quicktime) and some SMIL code to combine the media onto a texture and got it working on SL, not tested it on OpenSim, but it should work just the same. It's quite a simple language/syntax to play with: http://www.w3schools.com/smil/default.asp.

Hope that helps,
Chris

-----Original Message-----
From: opensim-dev-bounces at lists.berlios.de [mailto:opensim-dev-bounces at lists.berlios.de] On Behalf Of Geetika S
Sent: 19 February 2009 08:31
To: opensim-dev at lists.berlios.de
Subject: Re: [Opensim-dev] OpenSim Hardware Requeriments

Thanks Torrid. I was thinking more in terms of doing real-time mixing of
multiple streams on the streaming server and sending it off. This way
webcam feeds of everyone in a conference room can be displayed on a wall -
everyone sees everyone (including themselves) but its just one video
stream.

Geetika Sharma

opensim-dev-bounces at lists.berlios.de wrote on 02/19/2009 12:40:06 PM:

> Torrid Luna <torrid at primforge.com>
> Sent by: opensim-dev-bounces at lists.berlios.de
>
> 02/19/2009 12:40 PM
>
> Please respond to
> opensim-dev at lists.berlios.de
>
> To
>
> opensim-dev at lists.berlios.de
>
> cc
>
> Subject
>
> Re: [Opensim-dev] OpenSim Hardware Requeriments
>
> Hi Geetika,
>
> Also sprach Geetika S (geetika.s at tcs.com):
>
> > I wonder if anyone has tried composing multiple streams into a single
> > stream like a grid of videos and streaming that to the client. Would
> > introduce a slightly greater lag but then everyone would be at the same
> > lag.
>
> We have done that for slideshows on ZKM in Second Life. Sequences of
> Jpegs were composed with imagemagick, encoded into MJpeg and MP4 for
> streaming, with a slow framerate of 1fps or so.
>
> If you want to stream "real" video with higher framerates, you could
> probably try to compose the (4) videos on a screen and framegrab the
> composed signal from there. There are also video mixing cards with
> several inputs, but these are expensive.
>
>
> Cheers,
> Torrid
> --
> "Ich wünsche mir das Lied 'Frogger' von der Gruppe 'Atari'."
>  -- Fischmob
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