CODEWITHSUNDEEP
pythondockeropencvubuntu
Pablo Vicente Moñivar
Pablo Vicente Moñivar

Reputation: 53

No protocol specified : cannot connect to X server

I am trying to create a docker image with opencv in order to display a video. I have the following Dockerfile:

FROM python:3
ADD testDocker_1.py /
ADD video1.mp4 /
RUN pip install opencv-python
CMD [ "python", "./testDocker_1.py" ]

And the following python script:

import cv2
import os

if __name__ == '__main__':
    file_path = './video1.mp4'
    cap = cv2.VideoCapture(file_path)
    ret, frame = cap.read()
    while ret:
        ret, frame = cap.read()
        if ret:
            cv2.imshow('Frame Docker', frame)
            if cv2.waitKey(1) & 0xFF == ord('q'):
                break

So first I build the Image:

$ sudo docker build -t test1 .

And the problem comes when I run the container:

$ sudo docker run -ti --rm -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix test1
No protocol specified
: cannot connect to X server :1

Regards.

Upvotes: 2

Views: 7078

Answers (1)

Kapil Khandelwal
Kapil Khandelwal

Reputation: 1176

Try this

xhost +
sudo docker run -ti --rm -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix test1

Although it would solve this particular use case, but you need to make a note of the following:

Basically, the xhost + allows everybody to use your host x server;

Refrence

A better and recommended solution is present here

Upvotes: 4

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