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---------- Forwarded message ---------
From: Federico Camara Halac <camarafede@gmail.com>
Date: Thu, Feb 28, 2019 at 10:59 PM
Subject: Re: [PD] help loading pix_opencv
To: <ub@xdv.org>

Hi ub, thanks for checking

Yes, you are indeed correct that opencv is now in version 4, where pix_opencv was built against opencv2.

avilleret has started to update it to opencv3, but I still could not compile it, so I had to make further changes:

The two things I did on my macos-compile branch were:

- included some missing headers

- removed some objects that depended on legacy module from Makefile.am, which weren't many, and I guess they need to be adapted soon.

After all that, it did compile, AND link, so pix_opencv.pd_darwin was created. But, the object is not instantiated in pd, giving the error pasted on my previous email.

I will still keep looking into this, but I am wondering if there is something in ./configure that I am missing.

On Thu, Feb 28, 2019 at 10:28 PM ub <ub@xdv.org> wrote:

i just saw your fork does have adaptions for opencv3, but it might still be a deprecation issue. i can't build it with opencv 3.2.0, because it includes the legacy module and probably the C api. but maybe it's just the motion module has been relocated. see the second link

http://answers.opencv.org/question/42622/opencv-30-deprecated-opencv_legacy-module/

http://answers.opencv.org/question/190863/motion-detection-undefined-symbols-for-architecture-arm64/

cheers,

ub

On 28.02.19 22:15, ub wrote:
hey frederico,

you might be using a more modern major version of opencv than is referenced from the code of pix_opencv. calling functions this way apparently has been deprecated in opencv 3.

if you have opencv2 installed somewhere (as you seem to have the headers because your build did succeed) you can force the use of the other version library with setting LD_LIBRARY_PATH=/path/to/opencv2 in the shell from which you start pd.

hope that helps,

ub

On 28.02.19 21:30, Federico Camara Halac wrote:
Hi,

I compiled latest pix_opencv from my github fork, but I have linking problems.

I am on macos 10.14.2, mojave

Using `lipo -info`, all of pd, Gem.pd_darwin, pix_opencv.pd_darwin and libopencv_*.dylib show as: "Non-fat file ... architecture: x86_64"

This is the error on the console:

GEM: Graphics Environment for Multimedia

GEM: ver: 0.94.git v0.94_pre1

...

error: /Users/federicocamarahalac/Documents/pix_opencv/pix_opencv.pd_darwin: dlopen(/Users/federicocamarahalac/Documents/pix_opencv/pix_opencv.pd_darwin, 10): Symbol not found: _cvCalcGlobalOrientation

Referenced from: /Users/federicocamarahalac/Documents/pix_opencv/pix_opencv.pd_darwin

Expected in: flat namespace

in /Users/federicocamarahalac/Documents/pix_opencv/pix_opencv.pd_darwin

not reloading 'image' plugins (already 5 loaded)

pix_opencv_contours

error: ... couldn't create

Any pointers would be appreciated.

thanks,

fede

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