[AG-DEV] Identity certificates

[Thomas D. Uram]

Hi Luis:

The problem is with the AG node configuration.  By default, the 
VenueClient starts with a VideoConsumerService, which is configured to 
only receive video, not send it.  You should do this:

- In tools, select ConfigureNodeServices...
- Select the VideoConsumerService and remove it
- Select Services, then Add, then VideoService.  You'll be prompted to 
select a capture device.
- Save this configuration as the default
- Enter a Venue.  Vic will start, transmitting from the camera you 
selected, and displaying video streams from others in the venue.

Tom


On 3/14/08 11:22 AM, Luis Galárraga wrote:
> Our problem is that it seems VIC does not recognize the connected 
> webcams. We did the test in four computers: two laptops with Ubuntu 
> 7.10, one laptop and a PC with Windows XP. In all cases cameras were 
> tested and recognized by other applications: Cheese, aMSN and VLC in 
> Ubuntu Linux, VLC and Windows Messenger in Windows. VLC did not 
> recognize it automatically in Linux so we had to provide the name of 
> the device file.
>
> Then we ran the Venue Client and entered a venue. VIC and RAT started 
> running as expected and audio could be transmitted without any 
> problem, VIC only showed a "Waiting for video" message. When pressing 
> the Menu button in VIC window, we realized that "Transmit button" was 
> disabled in all computers. I read that happens when video capture 
> hardware is not properly configured. We are looking for a way of 
> telling vic the path to the device file of the camera, but no success 
> until now. By the way, these are the webcams we used: Creative VF0050, 
> Genius VideoCam Messenger and VGA Matrix Webcam.
>
> We also did another tests transmitting multicast camera streams with 
> vlc with relative success (when transmitting from Windows, there were 
> several problems, VLC frequently froze; in Linux complete happiness)
>
> In relation with the add-on services you mentioned, those are good 
> news for us, as we want to provide both Windows and Linux users a 
> simple way to participate in our webinars. Another question:  Where 
> can we found the most updated vic and rat documentation?
>
> Thanks in advance,
> Luis
>
> 2008/3/14, Thomas D. Uram <turam at mcs.anl.gov <mailto:turam at mcs.anl.gov>>:
>
>
>     Luis:
>
>     The video capture machine has, in the past, often run Linux, which
>     is why you got that impression from looking at older documentation. 
>
>     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.
>
>     There are add-on services for transmitting/receiving video using
>     VLC (http://netmedia.gist.ac.kr/agdv/download.html).  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).
>
>     Tom
>
>
>
>     On 3/13/08 10:07 AM, Luis Galárraga wrote:
>>     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.
>>
>>     Thanks again.
>>
>>     Luis,
>>
>>     2008/3/13, Thomas D. Uram <turam at mcs.anl.gov
>>     <mailto:turam at mcs.anl.gov>>:
>>
>>         Hi Luis:
>>
>>         There are a few things you need to know in this regard:
>>
>>         - By default, AG3 venues do not require that clients have a
>>         certificate
>>         to enter.  Venues can be optionally configured to require a
>>         certificate,
>>         in which case the user must present a certificate that
>>         satisfies the
>>         access controls on the venue.
>>
>>         - You can run your own CA and issue your own
>>         certificates.  In that
>>         case, you'll need to make sure your clients have both your CA
>>         certificate and their personal certificate.
>>
>>         Otherwise, this is general PKI.  If you have other questions,
>>         don't
>>         hesitate to ask.
>>
>>         Tom
>>
>>
>>         On 3/6/08 3:41 PM, Luis Galárraga wrote:
>>         > Greetings:
>>         >
>>         > I am part of project for developing a webinar
>>         infraestructure based on
>>         > Access Grid. After a long discussion in which suggestions in
>>         this
>>         > mailing list were strongly considered, we have decided to
>>         implement a
>>         > simple client for venues (in servers 3.x) using Java Web
>>         Start Apps.
>>         > As you can see, there are many things to do, and developers have
>>         > started by making tests with the soap interfaces in the our
>>         AG server,
>>         > however they are not clear about the  concepts behind the
>>         > authentication process. We know AG uses digital certificates for
>>         > everything: users and services and those certificates are
>>         generated by
>>         > AG developers (after a process request). Can our developer team
>>         > generate certificates signed by us or it is required your sign?
>>         > Several people in our university will probably use the
>>         system so we
>>         > would like to have the privilege to generate the
>>         certificates. Could
>>         > someone explain us in a better way, the technical issues behind
>>         > authentication based on certificates (= how you implemented
>>         it)?. I
>>         > hope you can help us.
>>         >
>>         > Thanks in advance,
>>         >
>>         > Regards,
>>         > Luis Galárraga
>>
>>
>
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