I built OpenCV from source in Windows 10 to include modules from contrib (namely, cuda optical flow stuff). I’m using OpenCV exclusively from Python 3, and I cannot import PyTorch after OpenCV. E.g.,
import cv2 import torch
OSError: [WinError 127] The specified procedure could not be found. Error loading "C:\Users\1\decipher-ai\venv\lib\site-packages\torch\lib\cublas64_11.dll" or one of its dependencies.
import torch import cv2
Both packages run fine.
This is how I created the build files:
cmake -S ..\sources\opencv-4.5.2\ -G "Visual Studio 16 2019" -D CMAKE_BUILD_TYPE=Release -D OPENCV_EXTRA_MODULES_PATH=../sources/opencv_contrib-4.5.2/modules -D WITH_CUDA=ON -D OPENCV_DNN_CUDA=ON -D CMAKE_INSTALL_PREFIX=../4.5.2 -D BUILD_SHARED_LIBS=OFF
I’m building with Visual Studio 2019.
I thought BUILD_SHARED_LIBS=OFF was going to make a static build which wouldn’t require DLLs being in the path, but it didn’t make any difference.
I mucked with
thinking it was an issue of what it was adding to the DLL path or system path, but nothing seems to work. Any ideas?
P.S. - this is with regular Python 3.8, not Anaconda.
[Edit 2021-05-11]: Version details:
OpenCV 4.5.2 - htt ps://github.com/opencv/opencv/releases/tag/4.5.2
OpenCV Contrib 4.5.2 - htt ps://github.com/opencv/opencv_contrib/releases/tag/4.5.2
Python 3.8.10 (from Python.org, not Windows App Store)
PyTorch (stable) installed for Cuda 11.1, as per their website, i.e.
pip3 install torch==1.8.1+cu111 torchvision==0.9.1+cu111 torchaudio===0.8.1 -f https://download.pytorch.org/whl/torch_stable.html
Sorry, had to break up those github URLs due to this two link per post limit…