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Last active June 22, 2020 06:03
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Solve problem installing OpenCV under Anaconda Python
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Anaconda_Python_OpenCV_fail.md

Using Anaconda's distribution of Python for SciPy on Windows 10

Trying to install OpenCV support according to the official page:

https://anaconda.org/conda-forge/opencv

conda install -c conda-forge opencv

fails with the following error:

Solving environment: failed with initial frozen solve. Retrying with flexible solve.

which ultimately fails.

This seems to be a common problem:

conda/conda#9367

however the solutions offered either do not fix the problem, are hacky workarounds or voodoo.

The clean work-around found to be successful was, immediately after the install, to "update" to an anaconda "metapackage", which are a collection of packages that have been tested to work together. Firstly update conda itself:

conda update conda

Then update the anaconda metapackage, which actually DOWNGRADES python to a custom version, but then you get no clashes:

conda update anaconda

Then you can install opencv:

conda install opencv

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