Install on Conda Env

[ruhyadi]

I'm new to the world of Linux and Jetson Nano. How to do opencv build in anaconda environment ?. I have tried installation but opencv is not installed on anaconda env. I need an opencv build to enable GStreamer.

[Qengineering]

We never install OpenCV with an installer like anaconda because we want to keep control of every modules that are going to be installed. In addition (and more importantly) we as C++ programmers need the headers of the various OpenCV routines. Something you don't get with a pip3 install or sudo apt-get install. Since we use the same OpenCV version everywhere on the Jetson Nano, it doesn't matter to us whether it is installed system wide rather than in a virtual environment. In addition, virtual environments keep making new copies of OpenCV, which is sometimes not desirable on a small system like the Nano. You can now do three things. 1) Install OpenCV within a virtual environment (which you created earlier) with a sudo apt -get install libopencv-dev python3-opencv. Can only be used in Python 2) Install OpenCV according to our guide. You can read here how you can set this up in a virtual environment. You can still use Python now. 3) Install OpenCV with a script from this repo. Even now Python can still be used, but you have OpenCV system wide on your Nano instead of in a virtual environment

[ruhyadi]

Good advice. I've done the installation according to the guide you provided, and it's work like a charm. I symlink python3 library to virtual env (conda) and installation to /usr/local. It works fine even now that my opencv is integrated with conda. This is the screenshoot that my Nano can use Gstreamer.

And this is the full cmake, that I build.

`General configuration for OpenCV 4.5.0 ===================================== Version control: unknown

Extra modules: Location (extra): /home/gamanet/opencv_contrib/modules Version control (extra): unknown

Platform: Timestamp: 2021-09-05T09:22:35Z Host: Linux 4.9.201-tegra aarch64 CMake: 3.10.2 CMake generator: Unix Makefiles CMake build tool: /usr/bin/make Configuration: RELEASE

CPU/HW features: Baseline: NEON FP16 required: NEON disabled: VFPV3

C/C++: Built as dynamic libs?: YES C++ standard: 11 C++ Compiler: /usr/bin/c++ (ver 7.5.0) C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG C Compiler: /usr/bin/cc C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG Linker flags (Release): -Wl,--gc-sections -Wl,--as-needed
Linker flags (Debug): -Wl,--gc-sections -Wl,--as-needed
ccache: NO Precompiled headers: NO Extra dependencies: dl m pthread rt 3rdparty dependencies:

OpenCV modules: To be built: alphamat aruco bgsegm bioinspired calib3d ccalib core datasets dnn dnn_objdetect dnn_superres dpm face features2d flann freetype fuzzy gapi hdf hfs highgui img_hash imgcodecs imgproc intensity_transform line_descriptor mcc ml objdetect optflow phase_unwrapping photo plot python2 python3 quality rapid reg rgbd saliency sfm shape stereo stitching structured_light superres surface_matching text tracking ts video videoio videostab xfeatures2d ximgproc xobjdetect xphoto Disabled: world Disabled by dependency: - Unavailable: cnn_3dobj cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev cvv java js julia matlab ovis viz Applications: tests perf_tests examples apps Documentation: NO Non-free algorithms: NO

GUI: GTK+: YES (ver 3.22.30) GThread : YES (ver 2.56.4) GtkGlExt: NO VTK support: NO

Media I/O: ZLib: /usr/lib/aarch64-linux-gnu/libz.so (ver 1.2.11) JPEG: /usr/lib/aarch64-linux-gnu/libjpeg.so (ver 80) WEBP: build (ver encoder: 0x020f) PNG: /usr/lib/aarch64-linux-gnu/libpng.so (ver 1.6.34) TIFF: /usr/lib/aarch64-linux-gnu/libtiff.so (ver 42 / 4.0.9) JPEG 2000: build (ver 2.3.1) OpenEXR: build (ver 2.3.0) HDR: YES SUNRASTER: YES PXM: YES PFM: YES

Video I/O: DC1394: YES (2.2.5) FFMPEG: YES avcodec: YES (57.107.100) avformat: YES (57.83.100) avutil: YES (55.78.100) swscale: YES (4.8.100) avresample: YES (3.7.0) GStreamer: YES (1.14.5) v4l/v4l2: YES (linux/videodev2.h)

Parallel framework: pthreads

Trace: YES (with Intel ITT)

Other third-party libraries: Lapack: NO Eigen: YES (ver 3.3.4) Custom HAL: YES (carotene (ver 0.0.1)) Protobuf: build (3.5.1)

OpenCL: YES (no extra features) Include path: /home/gamanet/opencv/3rdparty/include/opencl/1.2 Link libraries: Dynamic load

Python 2: Interpreter: /usr/bin/python2.7 (ver 2.7.17) Libraries: /usr/lib/aarch64-linux-gnu/libpython2.7.so (ver 2.7.17) numpy: /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.13.3) install path: lib/python2.7/dist-packages/cv2/python-2.7

Python 3: Interpreter: /home/gamanet/miniforge3/envs/vo3d/bin/python (ver 3.6.13) Libraries: /home/gamanet/miniforge3/envs/vo3d/lib/libpython3.6m.so (ver 3.6.13) numpy: /home/gamanet/miniforge3/envs/vo3d/lib/python3.6/site-packages/numpy/core/include (ver 1.19.5) install path: lib/python3.6/site-packages/cv2/python-3.6

Python (for build): /usr/bin/python2.7

Java:
ant: NO JNI: NO Java wrappers: NO Java tests: NO

Install to: /usr/local -----------------------------------------------------------------