[AG-TECH] Recording Access Grid Sessions

Ashley Wright a2.wright at qut.edu.au
Mon Jun 13 18:01:22 CDT 2005


Hi Natalia,

Sorry for the late reply, I was not around last week.

I ended up using RTPdump to record our session, we ended up with about 
20-30GB of dumped packets. I have not yet worked out how to turn this in 
to a video format. On the Linux version RTPdump just keep recording (the 
largest file was about 8GB), however RTPplay would not play this file. 
The windows version did however.

Did you find a way of turning the RTP traffic into a video format? If 
so, I would like to know what you used.

Ashley

Natalia Costas Lago wrote:

>
> we use the control computer as a record machine, the windows media 
> encoder captures the screen and audio coming from the XAP (both local 
> and remote), this way we capture the PPT + audio, if VIC is running u 
> can even select the videostream with the lecturer and overlap it over 
> the PPT. This way we have a wmv of our seminars, etc.
>
> What i was trying to do now is to record the actual AG session using 
> RTPdump, with this program i can record video+audio+PPT (as 
> screenstreamer uses RTP), i still have two problems:
> 1.- The size of files as all the videostreams are recorded: I'm trying 
> to solve it using RCBridge
> 2.- The filesize limit of the files generated by RTPdump (2GB): I've 
> found some fixes done to RTPdump.c to eliminate that software limit 
> (havent tested it yet).
>
> Using this second method I can later use windows media encoder to 
> obtain the wmv record of the session.
>
> Lately i've found a program called MboneVCR, though I havent tested it 
> yet.
>
> Regards.
>
> ----- Original Message ----- From: "kathy gill" <kegill at u.washington.edu>
> To: "ag-tech" <ag-tech at mcs.anl.gov>
> Sent: Saturday, June 11, 2005 12:20 AM
> Subject: Re: [AG-TECH] Recording Access Grid Sessions
>
>
>> Natalia Costas Lago wrote:
>>
>>> I found this post to the mailing list. I was wondering if u devised 
>>> any way or idea to do that. So far the only way we found to do that 
>>> was doing a screen capture with windows media encoder on a PC 
>>> running the VIC and RAT (so u can capture a PPT with several small 
>>> VIC video windows over it).
>>
>>
>> When working on the Descent to the Underworld project, we made screen 
>> captures of sessions using Camtasia Studio, a relatively inexpensive 
>> and fairly powerful tool; it is often used for capturing screens for 
>> online tutorials.
>>
>> However, for this to work properly, I believe you need a machine 
>> dedicated to session recording, so that all sound is coming thru RAT. 
>> I was able to record visuals only, since I was using one machine for 
>> AG and Camtasia. Any attempt to also record sound from both teams 
>> (mike and speakers) generated a massive echo. :-/
>>
>> I believe Druid eventually used a digital camcorder to capture the 
>> screen and sound.
>>
>>
>> Kathy
>>
>>
>> -- 
>>
>> Kathy E. Gill
>> Department of Communication
>> Digital Media Master's Degree Program
>> University of Washington
>> Box 353740 Seattle WA 98195 USA
>> http://faculty.washington.edu/kegill/
>>
>>
>


-- 
Ashley Wright
3864 9264
a2.wright at qut.edu.au
HPC and Research Support Group
Queensland University of Technology (QUT)




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