Signalling VNC sessions in multimedia sessions
cbeerse "at" lycos.nl
Mon May 3 08:43:01 2004
Jonathan Lennox wrote:
> Hello, all --
> It's often desirable to share a computer screen as part of a larger
> multimedia session. An example of this is if you're giving a presentation
> with slides (Powerpoint or the like) -- you want the other side to be able
> to see the slides you're showing on your local screen.
> Windows Messenger and NetMeeting support this with "Application Sharing"
> service, which I believe uses Microsoft's local variations on T.128, but as
> of yet there's no open specification for this as part of the IETF suite of
> multimedia conferencing protocols.
> I felt that VNC would be an obvious choice for this, so I've written up a
> specification for how to signal RFB sessions using the Session Description
> Protocol, the common protocol that all IETF multimedia protocols use to
> describe the media channels of a multimedia session.
Verry good idea. I've been thinking about this in the past. My idea is to create
a M$Windows device driver for a second (third, next) display that just does not
have any hardware, just like the unix/linux vnc-server.
Once installed and activated, M$Windows just sees it as if there is a second
display adapter and monitor and it can be used that way.
To access it, just point your viewer to the display, you also need to do that on
the system self.
I recal there has been a discussion on this but I don't recal details.
> The draft specification is available at
> I'd appreciate any comments on it from the VNC community before submitting
> it to the IETF Internet-Drafts repository. Do people feel that this is a
> good idea, and if so, is this the best way to go about it? Is there
> anything crucial that I've overlooked?