x11vnc and vncviewer for classroom

ggeist genegeist at me.com
Tue Feb 3 15:36:11 EST 2009

Is this Anna Schoolfield from Central Alabama Mensa?

Remember me?  Gene Geist.  Its been a long time so I wouldn't blame you.

Anna-2 wrote:
> *My previous post turned up blank for some reason.  Sorry about that.
> Hopefully this works....*
> From the original email by Arjun Sarwal:
> "The idea is that in a classroom, teacher wants to have these
> intermediate sessions where he just wants to explain to kids by doing
> things on his screen - mainly go through specific pages of a pdf while
> simultaneously explaining something orally. There are ~30 kids in the
> classroom."
> Another option to accomplish this is to stream the screen of the
> Ubuntu machine as ogg and then the XOs can simply play the stream via
> totem.
> On my Ubuntu box, I installed Istanbul, changed my screen resolution
> to 800x600, then did this to stream my entire desktop to the icecast
> server on my XS 0.4 test box:
>  gst-launch-0.10 oggmux name=mux ! shout2send ip=<myip> port=<port>
> password=secret mount=ubuntu.ogg istximagesrc name=videosource
> use-damage=false endx=800 endy=600 ! video/x-raw-rgb,framerate=5/1 !
> videorate ! ffmpegcolorspace ! videoscale method=1 !
> video/x-raw-yuv,width=800,height=600,framerate=5/1 ! theoraenc ! queue
> ! mux.
> The stream looked really good on the XO - very clear and legible.  The
> settings probably need tweaking, though, to scale up to ~30 users.
> I haven't tried setting up icecast on Ubuntu, but it should be
> possible to stream and broadcast on the same machine.  At any rate,
> this doesn't require anything extra to be installed on the XOs
> themselves.
> Anna Schoolfield
> Birmingham
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