Unable to use OpenCV in python on Ubuntu 16.04

Question

On my Ubuntu 16.04, I have installed OpenCV for python from the Ubunto repos using the command

sudo apt-get python-opencv

This installs the required libopencv-core2.4v5 and related packages & Python libraries via the dependencies.

When I try to import the cv2 from Python, I get the following error:

$ python
Python 2.7.12 (default, Jul  1 2016, 15:12:24) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: /usr/lib/x86_64-linux-gnu/libavutil.so.52: version `LIBAVUTIL_52' not found (required by /usr/local/lib/libopencv_highgui.so.2.4)
>>>

This should work out-of-the box. I have tried to install various combinations of extra packages from the repo without much luck.

/usr/lib/x86_64-linux-gnu/libavutil.so.52 appears to be a symbolic link:

$ ls -l /usr/lib/x86_64-linux-gnu/libavutil.so.52
lrwxrwxrwx 1 root root 38 Oct 26  2015 /usr/lib/x86_64-linux-gnu/libavutil.so.52 -> /usr/lib/x86_64-linux-gnu/libavutil.so

I wonder if anyone has seen this before and/or have any recommendations as to how I can resolve this. I have some faces, that needs detection :)

I had a feeble hope that it wasn't necessary, since it's all part of the official Ubuntu repo, but I'd like to get running, so I'll try that. Thanks. — Frank
– Frank, Commented Nov 21, 2016 at 20:13
Do you have multiple installations of Python? Another possibility is that you are running a python different from which opencv is associated to. — pyan
– pyan, Commented Nov 22, 2016 at 2:07
I don't think that the python version is the issue @pyan, since python finds the module, but the loading fails because of a library that has the wrong version. — Frank
– Frank, Commented Nov 22, 2016 at 6:30

Community · Accepted Answer · 2017-05-23 11:54:00Z

1

I used the script provided in How to install openCV 2.4.13 for Python 2.7 on Ubuntu 16.04? as suggested by @pyan, which solved my problem.

edited May 23, 2017 at 11:54

CommunityBot

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answered Nov 22, 2016 at 14:28

Frank

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