Depends on if it needs to be one machine as well.
Can easily be done with two machines and a scan converter

pp

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of 
IOhannes m zmoelnig
Sent: Monday, August 30, 2010 11:44 AM
To: John Harrison
Cc: [email protected]
Subject: Re: [PD] live pd patch mixed with Gem or pdp?

On 2010-08-30 17:04, John Harrison wrote:
> I'd like to take a patch from a pd window and mix it live with a Gem 
> or pdp window. pdp_capture would have been the ticket, but I can't get 
> it to compile and looking at the archives of this list, it doesn't 
> seem like others have had luck with it either. Any other ideas for me?
>

a bit complicated, but you can do that by doing screenshots with gstreamer, 
send it to a videoloopback device and read that (with pdp, Gem, GridFlow or 
whatelse)

- get v4l2loopback (http://code.google.com/p/v4l2loopback/)
 compile, install, load the module
- get gst-v4l2loopback (http://github.com/umlaeute/gst-v4l2loopback)
 compile (need gst-plugin-base-dev), install

run the gstreamer-pipeline, e.g.
$ gst-launch ximagesrc use-damage=false startx=0 starty=0 endx=640 endy=480 ! 
queue ! ffmpegcolorspace ! v4l2loopback

access the video using [pix_video], [pdp_v4l2] [#camera] or cat


running here.
this of course only grabs a portion of the screen, rather than a window and 
track that...

fgmadfs
IOhannes


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