question stereo with augmented reality

[Gladsomebeast]

Once you have the camera feed in Vizard as a texture, use the VideoVision module.

import VideoVision
VideoVision.add(leftCam=leftTexture, rightCam=rightTexture)

What is the manufacturer of the cameras on the HMD? If the cameras support "DirectShow" and are seen by Vizards "VideoCamera" plugin, then use that to get the camera feeds.

If VideoCamera does not do it, then you'll have to write a plugin to connect to the camera's SDK and update a OSG texture object. Checkout the Vizard SDK imagegen plugin example. You can get the SDK on the Vizard downloads page.