If I understand correctly, the last 2 patches are all that is needed? I will hopefully find time to test today with:
opencv-20180401.tgz (for older like ubuntu 16)

opencv-20200306.tgz (for what I have been using for the releases)

These 2 patches only?

0001-Try-to-disable-jasper-jpeg2000-in-opencv.patch
0002-Disable-more-in-opencv-build.patch

On Sat, May 21, 2022 at 10:01 AM Andrew Randrianasulu via Cin <cin@lists.cinelerra-gg.org> wrote:

so, if this miniseries does not break older (3.x) opencv we can hopefully apply it to our main codebase...

On Saturday, May 21, 2022, Andrea paz <gamberucci.andrea@gmail.com> wrote:
OK, thank you. With the 2 patches I was able to build working OpenCv plugins.

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