[AG-TECH] FW: VRVS/AccessGrid Integration (fwd)
Osland, CD (Chris)
C.D.Osland at rl.ac.uk
Fri Feb 1 11:30:04 CST 2002
Here are some notes that were sent to me a long time ago. They
may now be way out of date, but I thought I'd pass them on as
they have quite a few URLs thart may now have more up-to-date
Chris Osland Office tel: +44 (0) 1235 446565
Digital Media and Access Grid Medialab tel: +44 (0) 1235 446459
BIT Department Access Grid room tel: +44 (0) 1235 445666
e-mail: C.D.Osland at rl.ac.uk Fax: +44 (0) 1235 445597
CLRC Rutherford Appleton Laboratory (Bldg. R18)
Chilton, DIDCOT, Oxon OX11 0QX, UK
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From: Alan J. Flavell [mailto:flavell at a5.ph.gla.ac.uk]
Sent: 24 July 2001 14:25
To: PPNCG private list
Subject: FW: VRVS/AccessGrid Integration (fwd)
This just arrived via the ESnet H.323 mailing list (I guess we'd get
to see it by other routes too, but anyhow...)
> -----Original Message-----
> From: Philippe Galvez [mailto:philippe.galvez at cern.ch]
> Sent: Tuesday, July 24, 2001 5:57 AM
> To: vrvs-announce at internet2.edu
> Subject: VRVS/AccessGrid Integration
> Dear Colleagues,
> This is an announcement about the integration of AccessGrid
> (www.accessgrid.org) in VRVS.
> As you know, VRVS (www.vrvs.org) technology gives the
> possibility to
> use either Mbone tools, H.323 clients or MPEG2 compression to perform
> multipoint videoconferencing. Today, we just released the AccessGrid
> integration to VRVS.
> You can access this functionality at:
> You can enter to a Virtual Venue and join a meeting
> either by using
> the Mbone tools or using and a H.323 client (*). For both cases, you
> will receive only one video stream. But, you have the possibility to
> select the video that you wish to receive by clicking on the "Video
> mode" icon. You can:
> o Set the display mode to "Selected Participants" and select from
> the participants list the video you want to see.
> o Set the display mode to "Browse Video" and then you see
> each video
> site in turn, selected in a "round robin" that switches from
> one site to
> the next according to a preset timer.
> Note that video and audio streams are sent in unicast to the
> corresponding VRVS/Accessgrid participant.
> Let us know if you want more information and just have comments
> Philippe Galvez on behalf of the VRVS team.
> o You can use the AccessGrid Mbone tools. You just need to copy
> the Accessgrid vic and rat in the VRVS2 directory which is
> created when
> you installed VRVS
> o H.323 video clients.
> + you will be able to see video if you use a Vic version
> that included the fixed bug for the h.261 encoding schema and the your
> H.323 client is able to send video (e.g. Netmeeting with a connected
> + The AccessGrid node will be able to hear you
> but in order
> to have the H.323 client able to decode audio from a Virtual
> Venue, Rat
> should be set to PCM (uLaw) at 8 kHz (This is the standard in H.323
> (**) The gateway machine has been graciously provided by Bob Olson and
> Terry Disz at MCS/Argonne. Thanks for their support. The machine which
> runs the VRVS reflector performs the interface between the multicast
> cloud and the unicast streams that are sent to the particular machine.
> For list utilities, archives, subscribe, unsubscribe, etc.
> please visit the
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