I Can't display camera

[DanielLondonoS]

Whenever I run the command umt -camera -display it tells me that it cannot open the display.

What can be?

[IotGod]

Open another terminal and type : xhost +

[cesare-montresor]

Open another terminal and type : xhost +

I'm having the same issue. I've tried "xhost +" in all the consoles I could try, but I'm keep getting the very same error as DanielLondonoS.

[DanielLondonoS]

Get the same result :'(

[cesare-montresor]

Ok, I managed to solve it by adding the following params to the docker run

 --env="DISPLAY" --net=host

This is what I use for my dockerized umt (/home/pi/umt/ )

umt.sh

#!/bin/bash

export UMT_PATH=/home/pi/umt/ 
export UMT_OUT=${UMT_PATH}/out 

mkdir -p ${UMT_PATH}
mkdir -p ${UMT_OUT}
cd ${UMT_PATH}

docker run --rm --env="DISPLAY" --net=host -it --privileged --mount type=bind,src=${UMT_OUT},dst=/root umt umt "$@"

start-camera.sh

#!/bin/bash

xhost +; ./umt.sh -camera -display   

That's how it looks my directory structure

pi@raspberrypi:~/umt $ pwd
/home/pi/umt
pi@raspberrypi:~/umt $ ls
docker-bash.sh  highway_01.mp4  rpi-urban-mobility-tracker  umt.sh
get-docker.sh   out             start-camera.sh             video-test.sh