Video out

Samuel Lehman

Hello, I was wondering if there was anyway to get video out from the voxl2 and/or the voxl2 mini. According the docs on your website, I see that J9 on the voxl2 supports display port alternate mode; I was wondering if I can somehow connect a usb to displayport cable and get video from it to display on a local monitor. I know I can stream video over wifi/ethernet, but for my project I want to get video locally.

Alex Kushleyev

@Samuel-Lehman , currently VOXL2 (M0154 variant, but not M0054 or VOXL2 mini M0104) has hardware support for display port output, the software is not available (no ETA at this point). VOXL2 is not intended to be used as a desktop computer, although it could be :).

However, if you just want to stream video without wifi / ethernet, you can actually use a cool trick : ADB port forwarding:

plug in USBC cable from your VOXL2 in to linux pc
run the following command to create a forwarding tunnel between voxl port 80 to port 8080 of your linux machine :

adb forward tcp:8080 tcp:80

If you have voxl-camera-server and voxl-portal already running, you should be able to view the camera streams in the browser at http://localhost:8080/video.html?cam=hires_color or something like that (depending on your camera name). I just tested it and it works well. You can use voxl-portal as you normally would, when using an network connection.

A few notes

please make sure to use SDK 1.3.4 or later or at least voxl-portal because we recently added a fix for voxl-portal to work with port forwarding : https://gitlab.com/voxl-public/voxl-sdk/services/voxl-portal/-/network/master?ref_type=heads
voxl-portal can also display h264 video, but it needs a fix that i am working on and is almost done.

If this approach would work for you, you can test the non-encoded streams and we'll get the fix for h264 into voxl-portal soon.

Alex

Samuel Lehman

@Alex-Kushleyev I see, that's unfortunate but thanks for letting me know.