[PD] live pd patch mixed with Gem or pdp?
john.harrison at alum.mit.edu
Tue Aug 31 07:32:24 CEST 2010
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
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!
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
> [ 46.328929] v4l2loopback: Unknown symbol video_unregister_device
> [ 46.328996] v4l2loopback: disagrees about version of symbol
> [ 46.328998] v4l2loopback: Unknown symbol video_device_alloc
> [ 46.329091] v4l2loopback: disagrees about version of symbol
> [ 46.329093] v4l2loopback: Unknown symbol video_register_device
> [ 46.329178] v4l2loopback: disagrees about version of symbol
> [ 46.329179] v4l2loopback: Unknown symbol video_device_release
> similarly, modprobe webcamstudio returns in dmesg:
> [ 39.281212] webcamstudio: disagrees about version of symbol
> [ 39.281215] webcamstudio: Unknown symbol video_devdata
> [ 39.281309] webcamstudio: disagrees about version of symbol
> [ 39.281311] webcamstudio: Unknown symbol video_unregister_device
> [ 39.281376] webcamstudio: disagrees about version of symbol
> [ 39.281377] webcamstudio: Unknown symbol video_device_alloc
> [ 39.281446] webcamstudio: disagrees about version of symbol
> [ 39.281448] webcamstudio: Unknown symbol video_register_device
> [ 39.281551] webcamstudio: disagrees about version of symbol
> [ 39.281553] webcamstudio: Unknown symbol video_device_release
> a reboot doesn't help.
> On 08/30/2010 11:40 AM, ydegoyon at gmail.com wrote:
>> 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 ..
>> 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
>>> <zmoelnig at iem.at <mailto:zmoelnig at 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
>>> Gem, GridFlow or whatelse)
>>> - get v4l2loopback (http://code.google.com/p/v4l2loopback/)
>>> compile, install, load the module
>>> - get 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
>>> and track that...
>>> Pd-list at iem.at mailing list
>>> UNSUBSCRIBE and account-management ->
John Harrison http://alumni.media.mit.edu/~harrison
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