On Tue, Sep 1, 2015 at 2:57 PM, Christian Buchner
<[email protected]> wrote:
>
> 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.

The DirectShow filter chain alone will add you several frames of
latency easily. DirectShow is far from a real time, low latency API.

The fact that the camera is an USB 3.0 model is a red herring - that
only affects how fast it could *theoretically* transfer data but has
no impact on the various buffering and processing done once the data
are in your machine.

> I am hoping that OpenGL applications also benefit from the low level driver 
> support created for the Oculus and similar VR devices.

Even if they didn't, even the plain old Rift DK1 has a sub 20ms
latency. So that is certainly not the source of your problem.

J.
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