Can you use V4L or Gstreamer with the Astra (Not using OpenCV)

rghamilton3 2017-09-22 04:18:59 UTC #1

I was wondering if it's possible to access at least the color stream from the Astra using strictly V4L or Gstreamer without OpenCV or OpenNI?

This thread (https://3dclub.orbbec3d.com/t/astra-pro-color-image/309/3) says it's possible, however, I don't see the Astra listed as a device that I can open e.g. /dev/video0. NiViewer works fine so I don't think there are any connection/hardware issues. Is it listed under a different naming scheme?

Thanks!

Jesse 2017-09-22 05:14:07 UTC #2

The Astra cameras have some differences between models. I think only the Astra Pro delivers the color stream over UVC while all the others do it through OpenNI.

ShikiByakko 2017-09-26 07:35:34 UTC #3

The Astra and Astra S (And their respective mini models) only get their color stream from OpenNI or AstraSDK. The Astra Pro model, includinc Persee on the other hand, cannot get their color stream from OpenNI or AstraSDK, since the color stream is an standard UVC stream, and as such you can use any library or software compatible with UVC web cameras.

If NiViewer shows the color stream, it means that you are using a non Pro version of the Astra cameras, and as such you are unable to use it as an strandard UVC stream.

gvimont 2020-09-29 08:45:36 UTC #4

Hi,
Have you tried the openni2 plugin of gstreamer ?
https://gstreamer.freedesktop.org/documentation/openni2/index.html?gi-language=c

asifkhan 2020-10-06 18:35:22 UTC #5

Orbbec Astra Stereo S has UVC device for color (RGB) stream. I'm using OpenNi2 (downloaded from orbbec site) to get depth and ir frames while OpenCV to get RGB frames.

I noticed that depth and rgb frames are not synchronized. At the moment, I struggle to synchronize the depth and rgb frames. I would appreciate if someone can help.