Error trying to import cv2(opencv-python) package

Question

I am trying to access my webcam with cv2(opencv-python) package.

When I try to import it I get this error:

Traceback (most recent call last):
  File "server.py", line 6, in <module>
    import cv2
  File "/usr/local/lib/python3.8/dist-packages/cv2/__init__.py", line 5, in <module>
    from .cv2 import *
ImportError: libGL.so.1: cannot open shared object file: No such file or directory

Note: I am trying to import this package on putty, on Linode server - that might be useful information.

If anyone can explain to me what is happening and maybe solve the problem I will highly appreciate it!

I did that already, no errors and after installing the error appears — Marko, Sep 20 '20 at 09:56
Visit link may be it will helpful https://linuxize.com/post/how-to-install-opencv-on-ubuntu-18-04/ — Muhammad Rizwan Munawar, Sep 20 '20 at 09:57
I tried running the command pip3 check opencv-python and this is the output: pygobject 3.36.0 requires pycairo, which is not installed. launchpadlib 1.10.13 requires testresources, which is not installed. — Marko, Sep 20 '20 at 09:59
Please specify the version when installing with pip Ex. "pip install opencv-python==4.1.2.30" — aravinda_gn, Dec 31 '20 at 07:55

score 41 · Accepted Answer · answered Sep 20 '20 at 11:24

Install opencv-python-headless instead of opencv-python. Server (headless) environments do not have GUI packages installed which is why you are seeing the error. opencv-python depends on Qt which in turn depends on X11 related libraries.

Other alternative is to run sudo apt-get install -y libgl1-mesa-dev which will provide the missing libGL.so.1 if you want to use opencv-python. The libgl1-mesa-dev package might be named differently depending on your GNU/Linux distribution.

Full installation guide for opencv-python can be found from the package documentation: https://github.com/skvark/opencv-python#installation-and-usage

libgl1-mesa-dev works fine with ubuntu 20.04 and corrects the problem — Jean Marie, May 09 '22 at 05:03
headless option solved my issue with docker, But not sure what it means exactly — sanketh s, Jun 12 '22 at 12:03

score 0 · Answer 2 · answered Nov 12 '22 at 18:20

0

this worked for me:

conda install -c fastai opencv-python-headless

answered Nov 12 '22 at 18:20

Kaveh P. Yousefi

165
1
2
13

Error trying to import cv2(opencv-python) package

2 Answers2

Linked