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<br>
Luis:<br>
<br>
The video capture machine has, in the past, often run Linux, which is
why you got that impression from looking at older documentation. <br>
<br>
In AG3, vic can use USB cameras, firewire cameras, and dedicated
capture cards with either a VFW (older) or WDM/DirectShow (newer)
driver. You should be having success in either of these cases. If
you're not, we need to look into the cause a little deeper. Provide
more details of the problems you ran into, and your configuration, and
I/we can help.<br>
<br>
There are add-on services for transmitting/receiving video using VLC
(<a class="moz-txt-link-freetext" href="http://netmedia.gist.ac.kr/agdv/download.html">http://netmedia.gist.ac.kr/agdv/download.html</a>). These have so far
only been made available on Windows, but it would be trivial to make
them also work under Linux (with VLC; DVTS would be more difficult).<br>
<br>
Tom<br>
<br>
<br>
On 3/13/08 10:07 AM, Luis Galárraga wrote:
<blockquote
cite="mid:3666c210803130807g79443920x62a9439c67408e6c@mail.gmail.com"
type="cite">Thanks a lot for your help Tom. I have two additional
questions, but they related to audio and video transmision. As I
mentioned, our objective are single node users which should have just a
webcam and a microphone to participate in a webinar. People here in
ESPOL (colleagues but not members of this project), have successfully
tested AG in node configuration, but when we tried with a single
computer, we could not transmit video. Worried about this fact, I read
all documentation about VIC and understood that it requires a video
capture card (our colleagues had one) for transmitting video. Reviews
and documentation about node configurations indicate that the video
capture computer should be a Linux machine with a video capture card
and that only in Windows it is possible do it with a usb webcam or a
firewire camera (no video card needed). Our tests were in both
platforms without success. Do Linux users need a frame grabber for
transmit video? Is it possible to use another tool like VLC for
transmitting video? We had successful results transmitting multicast
video streams from a webcam using VLC in Ubuntu Linux and Windows XP.
In addition, we found a way of redirecting raw video to another
application instead of showing it with VLC. <br>
<br>
Thanks again.<br>
<br>
Luis,<br>
<br>
<div><span class="gmail_quote">2008/3/13, Thomas D. Uram <<a
moz-do-not-send="true" href="mailto:turam@mcs.anl.gov">turam@mcs.anl.gov</a>>:</span>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi
Luis:<br>
<br>
There are a few things you need to know in this regard:<br>
<br>
- By default, AG3 venues do not require that clients have a certificate<br>
to enter. Venues can be optionally configured to require a certificate,<br>
in which case the user must present a certificate that satisfies the<br>
access controls on the venue.<br>
<br>
- You can run your own CA and issue your own certificates. In that<br>
case, you'll need to make sure your clients have both your CA<br>
certificate and their personal certificate.<br>
<br>
Otherwise, this is general PKI. If you have other questions, don't<br>
hesitate to ask.<br>
<br>
Tom<br>
<br>
<br>
On 3/6/08 3:41 PM, Luis Galárraga wrote:<br>
> Greetings:<br>
><br>
> I am part of project for developing a webinar infraestructure
based on<br>
> Access Grid. After a long discussion in which suggestions in this<br>
> mailing list were strongly considered, we have decided to
implement a<br>
> simple client for venues (in servers 3.x) using Java Web Start
Apps.<br>
> As you can see, there are many things to do, and developers have<br>
> started by making tests with the soap interfaces in the our AG
server,<br>
> however they are not clear about the concepts behind the<br>
> authentication process. We know AG uses digital certificates for<br>
> everything: users and services and those certificates are
generated by<br>
> AG developers (after a process request). Can our developer team<br>
> generate certificates signed by us or it is required your sign?<br>
> Several people in our university will probably use the system so we<br>
> would like to have the privilege to generate the certificates.
Could<br>
> someone explain us in a better way, the technical issues behind<br>
> authentication based on certificates (= how you implemented it)?. I<br>
> hope you can help us.<br>
><br>
> Thanks in advance,<br>
><br>
> Regards,<br>
> Luis Galárraga<br>
</blockquote>
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<br>
</blockquote>
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