If your pip is too old, it will try to use the new source distribution introduced in 4.3.0.38 to manually build OpenCV because it does not know how to install manylinux2014 wheels. Since opencv-python version 4.3.0.*, manylinux1 wheels were replaced by manylinux2014 wheels.
Q: Pip install fails with ModuleNotFoundError: No module named 'skbuild'? Q: Do I need to install also OpenCV separately?Ī: No, the packages are special wheel binary packages and they already contain statically built OpenCV binaries. For example:Ĭv2.CascadeClassifier( + "haarcascade_frontalface_default.xml")īefore opening a new issue, read the FAQ below and have a look at the other issues which are already open. can be used as a shortcut to the data folder.
Do not install multiple different packages in the same environment. There are four different packages (see options 1, 2, 3 and 4 below) and you should SELECT ONLY ONE OF THEM. Select the correct package for your environment: For example Linux distributions ship usually with very old pip versions which cause a lot of unexpected problems especially with the manylinux format. Make sure that your pip version is up-to-date (19.3 is the minimum supported version): pip install -upgrade pip. cv2 module in the root of Python's site-packages), remove it before installation to avoid conflicts. If you have previous/other manually installed (= not installed via pip) version of OpenCV installed (e.g.
Pre-built CPU-only OpenCV packages for Python.Ĭheck the manual build section if you wish to compile the bindings from source to enable additional modules such as CUDA.