Hi Dieter,
you sometimes have to change the resolution of your webcam via it's
own preference settings. Then you can use this new resolution via the
corresponding x:y.live that matches the --devices output equal to your
new resolution. Basically it's the same for the capture cards and you
can't (via OSG right now) alter some of the card/webcam settings
programatically. Hope this makes sense. Also make sure that you close
any webcam apps/previews/setting priot to running osgmovie as you
will likely get locked out as there seems to be some OS thing going
on restricting one app to the hardware at any one time wrt the
AbstractPlane DirectShow/QT wrapper.
Cheers,
Colin.
Dieter Pfeffer wrote:
Hi
I am using osgmovie like Colin has described to visualise a live stream from
a webcam (and it works very good) - but I can only see a resolution of
320x240; is there a limitation to this resolution ? - is there any way to
realise a higher resolution ?
Using Windows XP and OSG 2.3.6
Thanks
Dieter
Unclassified Mail
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Colin
Dunlop
Sent: Tuesday, 08 April, 2008 17:07
To: OpenSceneGraph Users
Subject: Re: [osg-users] Quicktime plugin livestreaming
documentation/examples
Hi Adrian,
I've not documented anything on the wiki yet but below is how
the result was achieved on Windows XP. See my previous post for
any more detail. The demo/example is really just a quad with
your live feed playing - so a I've just tweaked osgmovie here
to force load the plug-in from a ".live" association and then
interpret the file basename to get a device and input ID -
ugly but working...
0. If you have NO QuickTime driver for your device then install
<http://www.abstractplane.com/products/vdig.jsp>
Use the latest version and do the manual install from the zip.
You will jave to live with the demo mode or fork out some $$$.
If your capture device has a QuickTime driver then you do not
need this VDIG for Windows thing eg BlackMagic Intensity Pro.
1. Modify the osgmovie.cpp and make sure that the .live
extension is associated with the osgdb_qt plugin:
osgDB::Registry::instance()->addFileExtensionAlias("live","qt");
2. run osgmovie --devices
If you have any live feed devices associated with a QuickTime
driver then this will spit out some command line options and
associations.
It will also spit out any pseudo Windows VDIG wrapped Direct
Show devices in the same way
eg: ...
4:1.live Blackmagic HDTV 720 Intensity HDTV 720p 59.94
...
1:4.live Hauppauge WinTV 418 Video Capture
(4&E384A6E&0&48F0) S-Video 3 UYVY @ 720x480
...
3. run osgmovie and pass it a "pseudo" file name that will be
translated by the plug-in to point at an input device eg
$ osgmovie x:y.live
This will force load the osgdb_qt plug-in, and then attempt to
decode the x:y.live where x and y are the input and channel of
your input - eg 5:0.live
I plan to submit to Robert an osgvideo example which wraps some
of this up a bit better.
Cheers,
Colin.
Adrian Egli OpenSceneGraph (3D) wrote:
Hi
any demo / example ?
regards
2008/4/3, Mike Greene <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>:
Colin,
Success! Using the later version of VDIG that you referenced, I was
able to get a live stream to work with osgmovie.
I'm using a KOCOM camera running video through a Canopus ADVC 110 A/D
video convertor into a firewire cable.
This is on Windows XP, OSG 2.3.5, Visual Studio 2005 debug, Quicktime
SDK 7.3.
Mike Greene
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