Good news.
To use v4l2loopback, you must run sudo modprobe v4l2loopback each time. Alternately, you can have it load automatically in /etc/modules-load.d/modules.conf.
You can verify that the v4l2loopback module is loaded with lsmod
$ lsmod
Module Size Used by
bnep 16562 2
zram 26166 4
overlay 48691 0
spidev 13282 0
v4l2loopback 37383 0
On one of your computers, you have two webcams, possibly there is an integrated webcam on the laptop.
In that case, the THETA will be at /dev/video1
Sometimes, the pipeline needs to be adjusted.
If the video freezes, try set qos=false
if (strcmp(cmd_name, "gst_loopback") == 0)
pipe_proc = "decodebin ! autovideoconvert ! "
"video/x-raw,format=I420 ! identity drop-allocation=true !"
"v4l2sink device=/dev/video1 qos=false sync=false";
On Xavier, you may need to specify the decoder, instead of decodebin ! autovideoconvert The pipeline below is only for Jetson, not x86.
"nvv4l2decoder ! nv3dsink sync=false"
Update May 9, 2022 Running on Ubuntu 22.04
THETA X now running on Jammy Jellyfish, Ubuntu 22.04
nvidia driver 510.60
nvidia-smi
Mon May 9 15:24:06 2022
±----------------------------------------------------------------------------+
| NVIDIA-SMI 510.60.02 Driver Version: 510.60.02 CUDA Version: 11.6
running wayland
echo $XDG_SESSION_TYPE
wayland
Switch to X session for v4l2loopback
RICOH THETA X running firmware 1.10.1
