How to use OpenCV with Heroku

Question

When I attempt to deploy my application to Heroku I receive the following error:

File \"/app/project/app/_ _init__.py\", line 22, in 

        

Answer 1

You can install these missing libraries taking advantage of the heroku-buildpack-apt.

At the time of this writing, I have succesfully done it for this repo, hosted here, with the following steps:

1. Add heroku-buildpack-apt to your buildpacks on Heroku platform
2. Create a file named Aptfile and add the following libs: libsm6, libxrender1, libfontconfig1, libice6 (one per line). Example here.

Edit: in newer versions of OpenCV, you need only to list python-opencv on the Aptfile, as seen in the docs.