In this case I am using a slightly modified DirectShow OSG plug-in, running the osgviewer in single threaded mode. The plug-in provides an osg::ImageStream and updates a texture that is displayed in the OSG scene. The camera is an USB 3.0 model, and I would expect it to be one of the fastest "web cams" out there.
I am hoping that OpenGL applications also benefit from the low level driver support created for the Oculus and similar VR devices. Christian 2015-09-01 12:48 GMT+02:00 Björn Blissing <bjorn.bliss...@vti.se>: > > cbuchner1 wrote: > > Can you make any statements regarding latency improvements upgrading > from the 0.6 SDK to 0.7 for osgoculusviewer based applications? > > > Hi Christian, > > I have not had time to do any measurements regarding latency differences > between 0.6 and 0.7 yet. Sorry. > > > > cbuchner1 wrote: > > Our current use case is currently, attaching an Intel RealSense camera > to the front of the Oculus DK2 and streaming a live image into the viewer's > eyes. Our latency is currently in the area of about 3-4 video frames @75 > Hz, amounting to 40-50 ms. This is a bit too high and causes some motion > sickness and slow reactions in our unfortunate test persons. ;) > > > Are you talking about pure rendering latency (motion to photon) or the > camera to HMD latency (photon to photon)? > > If you are talking about the latter 40-50 is quite good I would say. And > as Jan says, the camera is probably the limiting factor in that case. > Another problem can be if you run the camera capture in the same thread as > the rest of the rendering. Moving the camera capture to an own thread gave > me a great performance boost, but results in the cameras running > asynchronous with the rendering. This in turn can gives a larger variance > in latency. > > Best regards > Björn > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=64975#64975 > > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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