ImportError: DLL load failed while importing cv2: The specified module could not be found.

[11philip22]

Hi,
I installed opencv-contrib-python 4.7.0.72 using pip for python 3.11.4 on Windows 10 x86-64
But when I run I get this exceptiom DLL load failed while importing cv2: The specified module could not be found.

Expected behaviour

I expect the module to import and not trow an error.

Actual behaviour

This exception gets trown

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python311\Lib\site-packages\cv2\__init__.py", line 181, in <module>
    bootstrap()
  File "C:\Python311\Lib\site-packages\cv2\__init__.py", line 153, in bootstrap
    native_module = importlib.import_module("cv2")
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Python311\Lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ImportError: DLL load failed while importing cv2: The specified module could not be found.

Steps to reproduce

• example code
  import cv2
• operating system
  Windows 10, i7-12700H with Intel Iris Xe Graphics and a NVIDIA RTX A1000
• architecture (e.g. x86)
  x86-64
• opencv-python version
  opencv-contrib-python-4.7.0.72

Issue submission checklist

• This is not a generic OpenCV usage question (looking for help for coding, other usage questions, homework etc.)
• I have read the README of this repository and understand that this repository provides only an automated build toolchain for OpenCV Python packages (there is no actual OpenCV code here)
• The issue is related to the build scripts in this repository, to the pre-built binaries or is a feature request (such as "please enable this additional dependency")
• I'm using the latest version of opencv-python

[GenericAccount2]

I have exactly this issue.
Is there a simple way to see which DLL failed to load, that sounds like a natural starting point for investigation.

[GenericAccount2]

After some investigation I see it fails on init.py in the cv2 folder on the line native_module = importlib.import_module("cv2")
No idea why yet

[encouver]

Is there a solution to this?

[kker4m]

Same problem, is there a solution ?

[GenericAccount2]

The instructions are a little out of date, but I believe they would solve the issue
Go to Windows -> Settings -> Uninstall/Install Apps
Go to Optional Features
Go to Add button
Look for Windows Media Pack

[aBelnades]

@GenericAccount2 This was the solution. Thank you.

[GenericAccount2]

I think that OpenCV should consider updating their documentation.
This is a frustrating error to encounter, and if documentation is out of date, and cannot be followed, nobody is normally going to self-solve their issue.

[opencv-alalek]

No idea which documentation you want to read.

https://pypi.org/project/opencv-python/

Q: Import fails on Windows: ImportError: DLL load failed: The specified module could not be found.?
A: If the import fails on Windows, make sure you have Visual C++ redistributable 2015 installed. If you are using older Windows version than Windows 10 and latest system updates are not installed, Universal C Runtime might be also required.
Windows N and KN editions do not include Media Feature Pack which is required by OpenCV. If you are using Windows N or KN edition, please install also Windows Media Feature Pack.
...

And this is a copy of top level README of this project:

https://github.com/opencv/opencv-python

[lanfengc]

In your Python environment, execute this code and install the required packages.
For example, I created a virtual environment with conda,
I executed "conda install numpy protobuf hdf5 cudnn cudatoolkit".
I don't know if "cudnn cudatoolkit" has to be installed. Since I compiled OpenCV with CUDA, I need to install it.

[dcarrion87]

Trying to run https://github.com/cudawarped/opencv-python-cuda-wheels on python 3.11 on Windows Server compiled by @cudawarped and getting import DLL error. All DLLs seem to be there. Not an issue when using python 3.7 on the same system.

[cudawarped]

Trying to run https://github.com/cudawarped/opencv-python-cuda-wheels on python 3.11 on Windows Server compiled by @cudawarped and getting import DLL error. All DLLs seem to be there. Not an issue when using python 3.7 on the same system.

This is not an officially supported release. Please raise an issue on that repo with more details regarding your setup and which wheel you are using and I'll take a look.

[dcarrion87]

@cudawarped solved as part of: #955

[201811017]

I have tried the solution of Windows Media pack and still I have the same issue. But i have the following paths in the environment variables: