Windows N and KN editions do not include Media Feature Pack which is required by OpenCV. If you are using older Windows version than Windows 10 and latest system updates are not installed, Universal C Runtime might be also required. Q: Import fails on Windows: ImportError: DLL load failed: The specified module could not be found.?Ī: If the import fails on Windows, make sure you have Visual C++ redistributable 2015 installed.
Please upgrade pip with pip install -upgrade pip. To use the new manylinux2014 pre-built wheels (or to build from source), your pip version must be >= 19.3. However, source build will also fail because of too old pip because it does not understand build dependencies in pyproject.toml.
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.
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.