ukoehb / cvvidproc Goto Github PK

When computing the background with the following method in python

def compute_bkgd_med(vid_path, num_frames=100):
vidpack = cvvidproc.VidBgPack(
vid_path,
'hist',
-1,
num_frames,
True,
0,
0,
200,
200)

print('getting video background')
bkgd_med = cvvidproc.GetVideoBackground(vidpack)
print('video background obtained')

return bkgd_med

I get the following output:

getting video background
Frames: 2056; Res: 1280x512(200x512 cropped); FPS: 60
terminate called after throwing an instance of 'cv::Exception'
what(): OpenCV(4.5.1-dev) /home/aylitalo/opencv/modules/core/src/matrix.cpp:810: error: (-215:Assertion failed) 0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows in function 'Mat'

Aborted (core dumped)

In step 4 of 9 of the build during installation (building cv_vid_bg_helpers.cpp.o), the following error arose

In file included from ../../../Sources/AsyncTokens/token_batch_generator.h:7,
from ../../../Sources/AsyncTokens/async_token_batch_generator.h:7,
from ../../../Sources/cv_vid_bg_helpers.cpp:4:
../../../Sources/AsyncTokens/ts_interval_timer.h:109:46: error: use of deleted function ‘std::atomic<_Tp>::atomic() [with _Tp = TSIntervalTimer::IntervalPair]’
109 | std::atomic m_interval_record{};
| ^
In file included from ../../../Sources/AsyncTokens/ts_interval_timer.h:11,
from ../../../Sources/AsyncTokens/token_batch_generator.h:7,
from ../../../Sources/AsyncTokens/async_token_batch_generator.h:7,
from ../../../Sources/cv_vid_bg_helpers.cpp:4:
/usr/include/c++/9/atomic:198:7: note: ‘std::atomic<_Tp>::atomic() noexcept [with _Tp = TSIntervalTimer::IntervalPair]’ is implicitly deleted because its exception-specification does not match the implicit exception-specification ‘’
198 | atomic() noexcept = default;
| ^~~~~~

I'm not sure of the cause, but I found this stackoverflow post describing a possible cause in detail.

A similar error occurs in step 5 of 9 (building main.cpp.o):

In file included from ../../../Sources/main.cpp:9:
../../../Sources/AsyncTokens/ts_interval_timer.h:109:46: error: use of deleted function ‘std::atomic<_Tp>::atomic() [with _Tp = TSIntervalTimer::IntervalPair]’
109 | std::atomic m_interval_record{};
| ^
In file included from ../../../Sources/AsyncTokens/ts_interval_timer.h:11,
from ../../../Sources/main.cpp:9:
/usr/include/c++/9/atomic:198:7: note: ‘std::atomic<_Tp>::atomic() noexcept [with _Tp = TSIntervalTimer::IntervalPair]’ is implicitly deleted because its exception-specification does not match the implicit exception-specification ‘’
198 | atomic() noexcept = default;
| ^~~~~~

and in step 7 of 9 (building cv_vid_bubbletrack_helpers.cpp.o):

In file included from ../../../Sources/AsyncTokens/token_batch_generator.h:7,
from ../../../Sources/AsyncTokens/async_token_batch_generator.h:7,
from ../../../Sources/cv_vid_bubbletrack_helpers.cpp:5:
../../../Sources/AsyncTokens/ts_interval_timer.h:109:46: error: use of deleted function ‘std::atomic<_Tp>::atomic() [with _Tp = TSIntervalTimer::IntervalPair]’
109 | std::atomic m_interval_record{};
| ^
In file included from ../../../Sources/AsyncTokens/ts_interval_timer.h:11,
from ../../../Sources/AsyncTokens/token_batch_generator.h:7,
from ../../../Sources/AsyncTokens/async_token_batch_generator.h:7,
from ../../../Sources/cv_vid_bubbletrack_helpers.cpp:5:
/usr/include/c++/9/atomic:198:7: note: ‘std::atomic<_Tp>::atomic() noexcept [with _Tp = TSIntervalTimer::IntervalPair]’ is implicitly deleted because its exception-specification does not match the implicit exception-specification ‘’
198 | atomic() noexcept = default;
| ^~~~~~

When in the ImgBackground folder, issuing the command from the README to install cvvidproc

<>
python3 setup.py --force-cmake --quiet install
<>

yields the following error message on my Ubuntu (18.04) terminal (tl;dr easy install doesn't have permission to write files to the Python distribution directory, but I don't know if I should grant them since easy install isn't particularly safe:

<>
copying PySources/cvvidproc/init.py -> _skbuild/linux-x86_64-3.8/cmake-install/PySources/cvvidproc/init.py

error: can't create or remove files in install directory

The following error occurred while trying to add or remove files in the
installation directory:

[Errno 13] Permission denied: '/usr/local/lib/python3.8/dist-packages/test-easy-install-1481.write-test'

The installation directory you specified (via --install-dir, --prefix, or
the distutils default setting) was:

/usr/local/lib/python3.8/dist-packages/

Perhaps your account does not have write access to this directory? If the
installation directory is a system-owned directory, you may need to sign in
as the administrator or "root" account. If you do not have administrative
access to this machine, you may wish to choose a different installation
directory, preferably one that is listed in your PYTHONPATH environment
variable.

For information on other options, you may wish to consult the
documentation at:

https://setuptools.readthedocs.io/en/latest/easy_install.html

Please make the appropriate changes for your system and try again.
<>

The demo C++ program (built with cmake -S . -B Build -DCMAKE_BUILD_TYPE=Release followed by cmake --build Build) does not find the video file for analysis in either background computation or bubble-tracking:

"./Build/cvvidproc --vid_path=./Videos/ --vid=vid.mp4Video file not detected: /home/aylitalo/CvVidProc/Videos/vid.mp4
Background obtained in: 0.014 seconds
Background frame created was malformed, unexpectedly!

Tracking bubbles...
Video file not detected: /home/aylitalo/CvVidProc/Videos/vid.mp4
Bubbles tracked in: 0.003 seconds
Number of bubbles: 0

To demonstrate that a video indeed exists at the specified location:

aylitalo@DESKTOP-SNTHKND:~/CvVidProc$ ls /home/aylitalo/CvVidProc/Videos/
vid.mp4

I created a virtual environment with Python 3.8 containing only numpy, scikit-build, and pybind11, with the hard-coded reference to my OpenCV installation, and received a similar error message as when I installed in my standard environment. The last few lines seem most relevant (I've addressed the errors during the build in other issues). It says to check the CMake output, but I can't figure out where that is:

running clean
Processing /mnt/c/Users/andyl/OneDrive - California Institute of Technology/Documents/Research/Kornfield/ANALYSIS/bubble-tracking/CvVidProc
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing wheel metadata ... done
Building wheels for collected packages: cvvidproc
Building wheel for cvvidproc (PEP 517) ... error
ERROR: Command errored out with exit status 1:
command: /mnt/c/Users/andyl/envs/cvkoe/bin/python /mnt/c/Users/andyl/envs/cvkoe/lib/python3.8/site-packages/pip/_vendor/pep517/_in_process.py build_wheel /tmp/tmpqwpy_tin
cwd: /tmp/pip-req-build-0iv3byhy
Complete output (135 lines):
Not searching for unused variables given on the command line.
-- The C compiler identification is GNU 9.3.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- The CXX compiler identification is GNU 9.3.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/pip-req-build-0iv3byhy/_cmake_test_compile/build
CMAKE version used: 3.18.4
-- The CXX compiler identification is GNU 9.3.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found OpenCV: /mnt/c/Downloads/opencv/build (found version "4.5.1")
-- Found Python3: /mnt/c/Users/andyl/envs/cvkoe/bin/python (found version "3.8.5") found components: Interpreter Development NumPy Development.Module Development.Embed
'/mnt/c/Users/andyl/envs/cvkoe/bin/python' '-c' 'import pybind11; print(pybind11.get_cmake_dir())'
-- Performing Test HAS_FLTO
-- Performing Test HAS_FLTO - Success
-- Found pybind11: /tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/pybind11/include (found version "2.6.2" )
-- Looking for C++ include pthread.h
-- Looking for C++ include pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - yes
-- Found Threads: TRUE
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/pip-req-build-0iv3byhy/_skbuild/linux-x86_64-3.8/cmake-build
[1/9] Building CXX object CMakeFiles/_core.dir/Sources/py_bindings.cpp.o
FAILED: CMakeFiles/_core.dir/Sources/py_bindings.cpp.o
/usr/bin/c++ -D_core_EXPORTS -Igenerated -I../../../Sources/AsyncTokens -I../../../Sources/ProcessorAlgos -I../../../Sources/ProcessorTokenHandlers -I../../../Sources/Utility -isystem /mnt/c/Downloads/opencv/build -isystem /mnt/c/Downloads/opencv/include -isystem /mnt/c/Downloads/opencv/modules/core/include -isystem /mnt/c/Downloads/opencv/modules/flann/include -isystem /mnt/c/Downloads/opencv/modules/imgproc/include -isystem /mnt/c/Downloads/opencv/modules/ml/include -isystem /mnt/c/Downloads/opencv/modules/photo/include -isystem /mnt/c/Downloads/opencv/modules/dnn/include -isystem /mnt/c/Downloads/opencv/modules/features2d/include -isystem /mnt/c/Downloads/opencv/modules/imgcodecs/include -isystem /mnt/c/Downloads/opencv/modules/videoio/include -isystem /mnt/c/Downloads/opencv/modules/calib3d/include -isystem /mnt/c/Downloads/opencv/modules/highgui/include -isystem /mnt/c/Downloads/opencv/modules/objdetect/include -isystem /mnt/c/Downloads/opencv/modules/stitching/include -isystem /mnt/c/Downloads/opencv/modules/ts/include -isystem /mnt/c/Downloads/opencv/modules/video/include -isystem /mnt/c/Downloads/opencv/modules/gapi/include -isystem /usr/include/python3.8 -isystem /tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/pybind11/include -isystem /tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/numpy/core/include -O3 -DNDEBUG -fPIC -fvisibility=hidden -flto -fno-fat-lto-objects -pthread -std=gnu++14 -MD -MT CMakeFiles/_core.dir/Sources/py_bindings.cpp.o -MF CMakeFiles/_core.dir/Sources/py_bindings.cpp.o.d -o CMakeFiles/_core.dir/Sources/py_bindings.cpp.o -c ../../../Sources/py_bindings.cpp
../../../Sources/py_bindings.cpp:9:10: fatal error: token_processor_algo_base.h: No such file or directory
9 | #include "token_processor_algo_base.h"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
[2/9] Building CXX object CMakeFiles/_core.dir/Sources/Utility/ndarray_converter.cpp.o
[3/9] Building CXX object CMakeFiles/_core.dir/Sources/ProcessorAlgos/highlight_bubbles_algo.cpp.o
[4/9] Building CXX object CMakeFiles/_core.dir/Sources/Utility/cv_util.cpp.o
[5/9] Building CXX object CMakeFiles/_core.dir/Sources/cv_vid_bg_helpers.cpp.o
FAILED: CMakeFiles/_core.dir/Sources/cv_vid_bg_helpers.cpp.o
/usr/bin/c++ -D_core_EXPORTS -Igenerated -I../../../Sources/AsyncTokens -I../../../Sources/ProcessorAlgos -I../../../Sources/ProcessorTokenHandlers -I../../../Sources/Utility -isystem /mnt/c/Downloads/opencv/build -isystem /mnt/c/Downloads/opencv/include -isystem /mnt/c/Downloads/opencv/modules/core/include -isystem /mnt/c/Downloads/opencv/modules/flann/include -isystem /mnt/c/Downloads/opencv/modules/imgproc/include -isystem /mnt/c/Downloads/opencv/modules/ml/include -isystem /mnt/c/Downloads/opencv/modules/photo/include -isystem /mnt/c/Downloads/opencv/modules/dnn/include -isystem /mnt/c/Downloads/opencv/modules/features2d/include -isystem /mnt/c/Downloads/opencv/modules/imgcodecs/include -isystem /mnt/c/Downloads/opencv/modules/videoio/include -isystem /mnt/c/Downloads/opencv/modules/calib3d/include -isystem /mnt/c/Downloads/opencv/modules/highgui/include -isystem /mnt/c/Downloads/opencv/modules/objdetect/include -isystem /mnt/c/Downloads/opencv/modules/stitching/include -isystem /mnt/c/Downloads/opencv/modules/ts/include -isystem /mnt/c/Downloads/opencv/modules/video/include -isystem /mnt/c/Downloads/opencv/modules/gapi/include -isystem /usr/include/python3.8 -isystem /tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/pybind11/include -isystem /tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/numpy/core/include -O3 -DNDEBUG -fPIC -fvisibility=hidden -flto -fno-fat-lto-objects -pthread -std=gnu++14 -MD -MT CMakeFiles/_core.dir/Sources/cv_vid_bg_helpers.cpp.o -MF CMakeFiles/_core.dir/Sources/cv_vid_bg_helpers.cpp.o.d -o CMakeFiles/_core.dir/Sources/cv_vid_bg_helpers.cpp.o -c ../../../Sources/cv_vid_bg_helpers.cpp
In file included from ../../../Sources/AsyncTokens/token_batch_generator.h:7,
from ../../../Sources/AsyncTokens/async_token_batch_generator.h:7,
from ../../../Sources/cv_vid_bg_helpers.cpp:4:
../../../Sources/AsyncTokens/ts_interval_timer.h:109:46: error: use of deleted function ‘std::atomic<_Tp>::atomic() [with _Tp = TSIntervalTimer::IntervalPair]’
109 | std::atomic m_interval_record{};
| ^
In file included from ../../../Sources/AsyncTokens/ts_interval_timer.h:11,
from ../../../Sources/AsyncTokens/token_batch_generator.h:7,
from ../../../Sources/AsyncTokens/async_token_batch_generator.h:7,
from ../../../Sources/cv_vid_bg_helpers.cpp:4:
/usr/include/c++/9/atomic:198:7: note: ‘std::atomic<_Tp>::atomic() noexcept [with _Tp = TSIntervalTimer::IntervalPair]’ is implicitly deleted because its exception-specification does not match the implicit exception-specification ‘’
198 | atomic() noexcept = default;
| ^~~~~~
[6/9] Building CXX object CMakeFiles/_core.dir/Sources/main.cpp.o
FAILED: CMakeFiles/_core.dir/Sources/main.cpp.o
/usr/bin/c++ -D_core_EXPORTS -Igenerated -I../../../Sources/AsyncTokens -I../../../Sources/ProcessorAlgos -I../../../Sources/ProcessorTokenHandlers -I../../../Sources/Utility -isystem /mnt/c/Downloads/opencv/build -isystem /mnt/c/Downloads/opencv/include -isystem /mnt/c/Downloads/opencv/modules/core/include -isystem /mnt/c/Downloads/opencv/modules/flann/include -isystem /mnt/c/Downloads/opencv/modules/imgproc/include -isystem /mnt/c/Downloads/opencv/modules/ml/include -isystem /mnt/c/Downloads/opencv/modules/photo/include -isystem /mnt/c/Downloads/opencv/modules/dnn/include -isystem /mnt/c/Downloads/opencv/modules/features2d/include -isystem /mnt/c/Downloads/opencv/modules/imgcodecs/include -isystem /mnt/c/Downloads/opencv/modules/videoio/include -isystem /mnt/c/Downloads/opencv/modules/calib3d/include -isystem /mnt/c/Downloads/opencv/modules/highgui/include -isystem /mnt/c/Downloads/opencv/modules/objdetect/include -isystem /mnt/c/Downloads/opencv/modules/stitching/include -isystem /mnt/c/Downloads/opencv/modules/ts/include -isystem /mnt/c/Downloads/opencv/modules/video/include -isystem /mnt/c/Downloads/opencv/modules/gapi/include -isystem /usr/include/python3.8 -isystem /tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/pybind11/include -isystem /tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/numpy/core/include -O3 -DNDEBUG -fPIC -fvisibility=hidden -flto -fno-fat-lto-objects -pthread -std=gnu++14 -MD -MT CMakeFiles/_core.dir/Sources/main.cpp.o -MF CMakeFiles/_core.dir/Sources/main.cpp.o.d -o CMakeFiles/_core.dir/Sources/main.cpp.o -c ../../../Sources/main.cpp
In file included from ../../../Sources/main.cpp:9:
../../../Sources/AsyncTokens/ts_interval_timer.h:109:46: error: use of deleted function ‘std::atomic<_Tp>::atomic() [with _Tp = TSIntervalTimer::IntervalPair]’
109 | std::atomic m_interval_record{};
| ^
In file included from ../../../Sources/AsyncTokens/ts_interval_timer.h:11,
from ../../../Sources/main.cpp:9:
/usr/include/c++/9/atomic:198:7: note: ‘std::atomic<_Tp>::atomic() noexcept [with _Tp = TSIntervalTimer::IntervalPair]’ is implicitly deleted because its exception-specification does not match the implicit exception-specification ‘’
198 | atomic() noexcept = default;
| ^~~~~~
[7/9] Building CXX object CMakeFiles/_core.dir/Sources/cv_vid_bubbletrack_helpers.cpp.o
FAILED: CMakeFiles/_core.dir/Sources/cv_vid_bubbletrack_helpers.cpp.o
/usr/bin/c++ -D_core_EXPORTS -Igenerated -I../../../Sources/AsyncTokens -I../../../Sources/ProcessorAlgos -I../../../Sources/ProcessorTokenHandlers -I../../../Sources/Utility -isystem /mnt/c/Downloads/opencv/build -isystem /mnt/c/Downloads/opencv/include -isystem /mnt/c/Downloads/opencv/modules/core/include -isystem /mnt/c/Downloads/opencv/modules/flann/include -isystem /mnt/c/Downloads/opencv/modules/imgproc/include -isystem /mnt/c/Downloads/opencv/modules/ml/include -isystem /mnt/c/Downloads/opencv/modules/photo/include -isystem /mnt/c/Downloads/opencv/modules/dnn/include -isystem /mnt/c/Downloads/opencv/modules/features2d/include -isystem /mnt/c/Downloads/opencv/modules/imgcodecs/include -isystem /mnt/c/Downloads/opencv/modules/videoio/include -isystem /mnt/c/Downloads/opencv/modules/calib3d/include -isystem /mnt/c/Downloads/opencv/modules/highgui/include -isystem /mnt/c/Downloads/opencv/modules/objdetect/include -isystem /mnt/c/Downloads/opencv/modules/stitching/include -isystem /mnt/c/Downloads/opencv/modules/ts/include -isystem /mnt/c/Downloads/opencv/modules/video/include -isystem /mnt/c/Downloads/opencv/modules/gapi/include -isystem /usr/include/python3.8 -isystem /tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/pybind11/include -isystem /tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/numpy/core/include -O3 -DNDEBUG -fPIC -fvisibility=hidden -flto -fno-fat-lto-objects -pthread -std=gnu++14 -MD -MT CMakeFiles/_core.dir/Sources/cv_vid_bubbletrack_helpers.cpp.o -MF CMakeFiles/_core.dir/Sources/cv_vid_bubbletrack_helpers.cpp.o.d -o CMakeFiles/_core.dir/Sources/cv_vid_bubbletrack_helpers.cpp.o -c ../../../Sources/cv_vid_bubbletrack_helpers.cpp
In file included from ../../../Sources/AsyncTokens/token_batch_generator.h:7,
from ../../../Sources/AsyncTokens/async_token_batch_generator.h:7,
from ../../../Sources/cv_vid_bubbletrack_helpers.cpp:5:
../../../Sources/AsyncTokens/ts_interval_timer.h:109:46: error: use of deleted function ‘std::atomic<_Tp>::atomic() [with _Tp = TSIntervalTimer::IntervalPair]’
109 | std::atomic m_interval_record{};
| ^
In file included from ../../../Sources/AsyncTokens/ts_interval_timer.h:11,
from ../../../Sources/AsyncTokens/token_batch_generator.h:7,
from ../../../Sources/AsyncTokens/async_token_batch_generator.h:7,
from ../../../Sources/cv_vid_bubbletrack_helpers.cpp:5:
/usr/include/c++/9/atomic:198:7: note: ‘std::atomic<_Tp>::atomic() noexcept [with _Tp = TSIntervalTimer::IntervalPair]’ is implicitly deleted because its exception-specification does not match the implicit exception-specification ‘’
198 | atomic() noexcept = default;
| ^~~~~~
ninja: build stopped: subcommand failed.
File "/tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/skbuild/setuptools_wrap.py", line 589, in setup
cmkr.make(make_args, env=env)
File "/tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/skbuild/cmaker.py", line 496, in make
raise SKBuildError(

-- Trying "Ninja" generator

--

-- Trying "Ninja" generator - success

Configuring Project
Working directory:
/tmp/pip-req-build-0iv3byhy/_skbuild/linux-x86_64-3.8/cmake-build
Command:
cmake /tmp/pip-req-build-0iv3byhy -G Ninja -DCMAKE_INSTALL_PREFIX:PATH=/tmp/pip-req-build-0iv3byhy/_skbuild/linux-x86_64-3.8/cmake-install/PySources/cvvidproc -DPYTHON_EXECUTABLE:FILEPATH=/mnt/c/Users/andyl/envs/cvkoe/bin/python -DPYTHON_VERSION_STRING:STRING=3.8.5 -DPYTHON_INCLUDE_DIR:PATH=/usr/include/python3.8 -DPYTHON_LIBRARY:FILEPATH=/usr/lib/x86_64-linux-gnu/libpython3.8.so -DSKBUILD:BOOL=TRUE -DCMAKE_MODULE_PATH:PATH=/tmp/pip-build-env-bxm2ypff/overlay/lib/python3.8/site-packages/skbuild/resources/cmake '-DCV_DIR:STRING='"'"'/mnt/c/Downloads/'"'"'' '-DCV_INSTALL_DIR:STRING='"'"'/mnt/c/Downloads/opencv/build/'"'"'' -DCMAKE_BUILD_TYPE:STRING=Release

Traceback (most recent call last):

An error occurred while building with CMake.
Command:
cmake --build . --target install --config Release --
Source directory:
/tmp/pip-req-build-0iv3byhy
Working directory:
/tmp/pip-req-build-0iv3byhy/_skbuild/linux-x86_64-3.8/cmake-build
Please see CMake's output for more information.

ERROR: Failed building wheel for cvvidproc
Failed to build cvvidproc
ERROR: Could not build wheels for cvvidproc which use PEP 517 and cannot be installed directly

Installing worked perfectly, thanks for patching up the package! I hit the following "ImportError" when I import inside a Python shell:

import cvvidproc as cv
Traceback (most recent call last):
File "", line 1, in
File "/mnt/c/Users/andyl/envs/cvkoe/lib/python3.8/site-packages/cvvidproc/init.py", line 4, in
from ._core import doc, VidBgPack, GetVideoBackground, HighlightBubblesPack, AssignBubblesPack, VidBubbleTrackPack, TrackBubbles
ImportError: /mnt/c/Users/andyl/envs/cvkoe/lib/python3.8/site-packages/cvvidproc/_core.cpython-38-x86_64-linux-gnu.so: undefined symbol: __atomic_compare_exchange_16

Similarly, in C++, the installation was perfect. The build also worked (with a few minor errors) but threw an error during linking ("[100%] Linking CXX executable cvvidproc"). The error message is long, but here's the preamble (and probably most relevant portion):

[100%] Linking CXX executable cvvidproc
/usr/bin/ld: CMakeFiles/cvvidproc.dir/Sources/main.cpp.o: in function main': main.cpp:(.text.startup+0x12a): undefined reference to __atomic_load_16'
/usr/bin/ld: main.cpp:(.text.startup+0x165): undefined reference to __atomic_compare_exchange_16' /usr/bin/ld: main.cpp:(.text.startup+0x17f): undefined reference to __atomic_load_16'

and the ending portion:

/usr/bin/ld: CMakeFiles/cvvidproc.dir/Sources/rand_tests.cpp.o: in function rand_tests::demo_trackbubbles(CommandLinePack&, cv::Mat&)': rand_tests.cpp:(.text+0x1627): undefined reference to __atomic_load_16'
/usr/bin/ld: rand_tests.cpp:(.text+0x1663): undefined reference to __atomic_compare_exchange_16' /usr/bin/ld: rand_tests.cpp:(.text+0x1678): undefined reference to __atomic_load_16'
/usr/bin/ld: CMakeFiles/cvvidproc.dir/Sources/rand_tests.cpp.o: in function rand_tests::test_timing_numpyconverter(int, bool)': rand_tests.cpp:(.text+0x1f39): undefined reference to __atomic_load_16'
/usr/bin/ld: rand_tests.cpp:(.text+0x1f73): undefined reference to __atomic_compare_exchange_16' /usr/bin/ld: rand_tests.cpp:(.text+0x1f99): undefined reference to __atomic_load_16'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/cvvidproc.dir/build.make:190: cvvidproc] Error 1
make[1]: *** [CMakeFiles/Makefile2:76: CMakeFiles/cvvidproc.dir/all] Error 2
make: *** [Makefile:84: all] Error 2

I'm using Python 3.8.5 and g++/gcc 9.3.0 on linux and have tried this on a virtual environment to make sure the peculiarities of other installed packages didn't interfere.

PS I found that this forum and this one discuss a similar error, but I don't understand how to implement their suggestions, so I thought I'd include links in case they're helpful.

Not a big issue, but just wanted to record that, if I don't import cv2 before cvvidproc, I get the following error:

Traceback (most recent call last):
File "test_tracking.py", line 16, in
import cvvidproc
File "/home/aylitalo/.local/lib/python3.8/site-packages/cvvidproc/init.py", line 4, in
from ._core import doc, VidBgPack, GetVideoBackground, HighlightBubblesPack, AssignBubblesPack, VidBubbleTrackPack, TrackBubbles
ImportError: libopencv_videoio.so.4.5: cannot open shared object file: No such file or directory

If I import cv2 beforehand, it works fine.