Re: Teleconference Application

Klaus Hofricher (hofrichter@fokus.gmd.de)
Sat, 08 Nov 1997 15:29:53 +0100

Luciano,

you wrote:

> I want to make a teleconference application in which the audio flow and
> the video flow are not files, but coming flows from devices such as camera
> and microphone, that therefore they are being generated "live". Is it
> correct to make a MHEG-5 application of this type? Can I code these audio
> and video flows as Stream objects, altering the code of my MHEG-5 engine
> so that it can receive and present the media flow, instead of seeking for
> the file defined in the ContentReference of the object?

We have done something similar to control a TV tuner in an EPG
environment using Resident Programs. But this is not interoperable in
DAVIC upto now, as far as I know. There is a call for Proposals out on
that.

A more confoming way in your example would be to utilize streams as you
indicated. My suggestion would be to define a content reference (e.g.
/dev/camera or CAMERA:) which causes the stream object instanciated to
access the live source instead of a file or network stream. At the
current time there is no common definition for this case, so you have to
make that on your own.

- Klaus

-- 
GMD FOKUS    German National Research Center for Information Technology
Klaus Hofrichter    Kaiserin-Augusta-Allee 31  D-10589 Berlin   Germany
mailto:hofrichter@fokus.gmd.de   http://www.fokus.gmd.de/usr/hofrichter
P: +49 30 3463 7211  Fx -8211  There is a reexamination, but no reparty