opencv2 import problem with python

[Rainer Hurling]

Am 29.06.2014 19:50 (UTC+1) schrieb Jason E. Hale:
> On Sun, Jun 29, 2014 at 4:47 AM, Zenny <garbytrash at gmail.com> wrote:
>> Thanks John:
>>
>> I am getting the following:
>>
>> "% grep ZTIN2cv15FeatureDetectorE /usr/local/lib/*
>> Binary file /usr/local/lib/libopencv_contrib.so matches
>> Binary file /usr/local/lib/libopencv_contrib.so.2 matches
>> Binary file /usr/local/lib/libopencv_contrib.so.2.4.7 matches
>> Binary file /usr/local/lib/libopencv_features2d.so matches
>> Binary file /usr/local/lib/libopencv_features2d.so.2 matches
>> Binary file /usr/local/lib/libopencv_features2d.so.2.4.7 matches
>> Binary file /usr/local/lib/libopencv_legacy.so matches
>> Binary file /usr/local/lib/libopencv_legacy.so.2 matches
>> Binary file /usr/local/lib/libopencv_legacy.so.2.4.7 matches
>> Binary file /usr/local/lib/libopencv_stitching.so matches
>> Binary file /usr/local/lib/libopencv_stitching.so.2 matches
>> Binary file /usr/local/lib/libopencv_stitching.so.2.4.7 matches
>>
>> I am CCing this mail to jhale for his attention, who is reportedly the
>> maintainer accoring to the ports Makefile.
>>
>> /z
>>
>>
>>
>>
>> On Sun, Jun 29, 2014 at 10:34 AM, John-Mark Gurney <jmg at funkthat.com> wrote:
>>>
>>> Zenny wrote this message on Sun, Jun 29, 2014 at 10:24 +0200:
>>>> Hi:
>>>>
>>>> I am trying to run opencv2 and installed it using the pkg binaries
>>>> (opencv
>>>> and py27-opencv).
>>>>
>>>> However when I try to import opencv2 module, it outputs:
>>>>
>>>> "% python
>>>> Python 2.7.6 (default, Mar  4 2014, 19:30:28)
>>>> [GCC 4.2.1 Compatible FreeBSD Clang 3.3 (tags/RELEASE_33/final 183502)]
>>>> on
>>>> freebsd10
>>>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>>> import cv2
>>>> Traceback (most recent call last):
>>>>   File "<stdin>", line 1, in <module>
>>>> ImportError: /usr/local/lib/python2.7/site-packages/cv2.so: Undefined
>>>> symbol "_ZTIN2cv15FeatureDetectorE"
>>>>>>> "
>>>>
>>>> cv2.so file does exist. Any hints to run opencv2 in FreeBSD 10.0 will be
>>>> appreciated! Thanks!
>>>
>>> Sounds like one of the libraries that cv2.so depends upon wasn't linked
>>> w/ cv2.so...  doing a: grep ZTIN2cv15FeatureDetectorE /usr/local/lib/*
>>> should identify it, and you should report it to opencv2's maintainer
>>> to fix..
>>>
>>> --
>>>   John-Mark Gurney                              Voice: +1 415 225 5579
>>>
>>>      "All that I will do, has been done, All that I have, has not."
>>
>>
> 
> I'm moving this discussion to the freebsd-ports mailing list.
> 
> Could you try the attached diff?  It's interesting that this has been
> in the ports
> tree for 7 months and nobody noticed it until now.

I am one of those guys who had some trouble with disfunctional opencv
libs, but did not react. Sorry for that, I had been very busy last months.

math/saga is a GIS application, which uses OpenCV in one of its modules.
For some month now, SAGA GIS disables this module at start time of the
program.

I tried your patch for graphics/opencv, but nothing changed for me. It
seems, the opencv libs continue to be non usable.

> Note: you need to import numpy before cv2.

Does this mean, we have to rebuild and reinstall math/py-numpy before
installing graphics/opencv? Do we have to also reinstall
graphics/opencv-core?

Thanks for your work,
Rainer Hurling