[PD] live pd patch mixed with Gem or pdp?

Pagano, Patrick pat at digitalworlds.ufl.edu
Mon Aug 30 17:51:47 CEST 2010

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


-----Original Message-----
From: pd-list-bounces at iem.at [mailto:pd-list-bounces at iem.at] On Behalf Of IOhannes m zmoelnig
Sent: Monday, August 30, 2010 11:44 AM
To: John Harrison
Cc: pd-list at iem.at
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...


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