Viewing full 360 vs 180

1

On my Jetson Xavier NX, I have been able to successfully connect the Theta V and create a /dev/video0 device that streams the full 360 video (from both lenses) in VLC as well as via gst-launcher

However, when I call the following on Jetson, I only see the 180 video from one lens.

import jetson.utils
camera = jetson.utils.videoSource("/dev/video0")

Full source code is here:

What do I need to do in order to see the full 360 video using jetson.utils.videoSource?

2

I found the solution. I had to explicitly resize the input image (3840x1920) to (1920x1080).

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3

Thanks for reporting back on your success. Did you intentionally set the live stream resolution to 1920x1080 in order to get DetectNet working?

I have my NVIDIA Jetson working with a 1920x1080 stream, but I was hoping that the Jetson Xavier NX could handle 4K streaming.

I’m getting 23fps with the 2K stream.
https://youtu.be/ykta9Hn2ESs

Perhaps like you, I went through a few of the DetectNet training tutorials here https://github.com/dusty-nv/jetson-inference

Those tutorials by Dusty are quite good.

As my son is studying aquatic biology, I’ve wanted to go through this tutorial on a fish detector.

https://jkjung-avt.github.io/fisheries-dataset/

However, I have not tried to build the tutorial yet.

4

Hi Craig,

Yes, here are the 2 approaches that worked.

  1. Set the Ricoh Theta resolution to 4k. Then, in dusty’s tutorials, rescale to 1920x1080. See dusty’s solution and response to me here:
    https://forums.developer.nvidia.com/t/question-on-jetson-utils-videosource/165342/8

  2. I updated gst_viewer.c to set the camera to FHD instead of UHD. Then, all the code in dusty’s tutorial works fine as is

Since I am using Xavier, I am seeing between 120-150 FPS depending on the approach you take

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