ok I got the modules to load by reloading the kernel image
sudo apt-get install --reinstall linux-image-`uname -r`
sudo depmod -a
now Yves solution works with pdp_v4l.
although modprobe v4l2loopback seems to work, Iohannes's incantation to
launch the pipeline returns: WARNING: erroneous pipeline: no element
"v4l2loopback"
also /dev/video3 becomes available when I modprobe v4l2loopback but
nothing can seem to access it --- invalid argument errors.
Assuming I can configure webcamstudio to autostart with the
configuration I need tho, I should be all set at this point.
Thanks for help!
-John
On 08/30/2010 11:59 PM, John Harrison wrote:
bleh I'm failing to get either v4l2loopback or webcamstudio modules to
actually load.
I'm running ubuntu Lucid 10.04 with 2.6.32-24-generic kernel
v4l2loopback svn builds and installs ok
however, modprobe v4l2loopback returns in dmesg:
[ 46.328926] v4l2loopback: disagrees about version of symbol
video_unregister_device
[ 46.328929] v4l2loopback: Unknown symbol video_unregister_device
[ 46.328996] v4l2loopback: disagrees about version of symbol
video_device_alloc
[ 46.328998] v4l2loopback: Unknown symbol video_device_alloc
[ 46.329091] v4l2loopback: disagrees about version of symbol
video_register_device
[ 46.329093] v4l2loopback: Unknown symbol video_register_device
[ 46.329178] v4l2loopback: disagrees about version of symbol
video_device_release
[ 46.329179] v4l2loopback: Unknown symbol video_device_release
similarly, modprobe webcamstudio returns in dmesg:
[ 39.281212] webcamstudio: disagrees about version of symbol
video_devdata
[ 39.281215] webcamstudio: Unknown symbol video_devdata
[ 39.281309] webcamstudio: disagrees about version of symbol
video_unregister_device
[ 39.281311] webcamstudio: Unknown symbol video_unregister_device
[ 39.281376] webcamstudio: disagrees about version of symbol
video_device_alloc
[ 39.281377] webcamstudio: Unknown symbol video_device_alloc
[ 39.281446] webcamstudio: disagrees about version of symbol
video_register_device
[ 39.281448] webcamstudio: Unknown symbol video_register_device
[ 39.281551] webcamstudio: disagrees about version of symbol
video_device_release
[ 39.281553] webcamstudio: Unknown symbol video_device_release
a reboot doesn't help.
-John
On 08/30/2010 11:40 AM, ydego...@gmail.com wrote:
ola,
pdp_capture was working once with an old version of ImageMagick
but anyway it was too slow,
so now its compilation is made optional,
it is a bit abandonware..
use webcamstudio instead ( http://www.ws4gl.org/ ),
it does the same as gstreamer that Iohannes recommends,
but with an interface...
it will output the screenshots to a vloopback device ..
about the disposition on the screen, no eye deer ..
ahoj!
sevy
John Harrison wrote:
is there a way to do these screenshots such that they don't actually
show up on a screen visible to the user i.e I don't have to show the
raw Pd patch to the user, only the mix? This is a 2-headed machine
(one machine --- I'll use 2 if I absolutely have to) and the plan is
to show a Gem or pdp window fullscreen on one head and a pdp window
fullscreen on the other. This leaves me not sure where to put the Pd
patch for the screenshots.
On Mon, Aug 30, 2010 at 10:44 AM, IOhannes m zmoelnig
<zmoel...@iem.at <mailto:zmoel...@iem.at>> wrote:
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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