OS: Ubuntu 24.04
CMake Version: 3.27.4
DepthAI Version: Cloned the latest depthai-core repository from GitHub.
OpenCV: Installed via libopencv-dev (version 4.6.0+dfsg).
OpenCV CMake files are located at: **/usr/lib/x86_64-linux-gnu/cmake/opencv4
**
Hello,
I’m facing a persistent issue with OpenCV integration while building depthai-core on my Ubuntu system. Despite multiple attempts, the getCvFrame() function isn’t available in libdepthai-core.so, and the library doesn’t link against OpenCV, as verified by ldd.
I built depthai-core with the following CMake command:
cmake -S. -Bbuild \ -D BUILD_SHARED_LIBS=ON \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D OpenCV_DIR=/usr/lib/x86_64-linux-gnu/cmake/opencv4
However, after the rebuild, libdepthai-core.so still didn’t link against OpenCV libraries (as verified by ldd).
I ran this to confirm OpenCV detection:
cmake --find-package -DNAME=OpenCV -DCOMPILER_ID=GNU -DLANGUAGE=CXX -DMODE=EXIST
output :
OpenCV found.
In build/CMakeCache.txt, I also confirmed:
DEPTHAI_OPENCV_SUPPORT:BOOL=ON
OpenCV_DIR:UNINITIALIZED=/usr/lib/x86_64-linux-gnu/cmake/opencv4
However:
grep -i opencv build/CMakeFiles/depthai-core.dir/link.txt
returned nothing, suggesting OpenCV is not being linked.
Each time, I cleaned the build directory and CMake cache with:
rm -rf build
rm -rf ~/.hunter
find . -name "CMakeCache.txt" -delete
Despite these efforts, the getCvFrame() function remains unavailable.
installed OpenCV using sudo apt install libopencv-dev. The relevant CMake files are located at /usr/lib/x86_64-linux-gnu/cmake/opencv4, which I set in OpenCV_DIR. OpenCV is otherwise functional on my system.
I verified the built libdepthai-core.so:
ldd /usr/local/lib/libdepthai-core.so | grep opencv
This returns nothing, indicating OpenCV isn’t being linked.
I suspect the issue might be related to how CMake is handling the OpenCV configuration.
How can I ensure that getCvFrame() is included in the compiled libdepthai-core.so?
Is there an additional step required to explicitly include OpenCV during the build process?
Could this issue be related to a cached or incorrect dependency ?
Any guidance or suggestions would be greatly appreciated. Please let me know if more details are needed to debug the problem.
Thank you!
