Problems with opencv2

[jetson1]

Hi, after a while I wanted to restart using my xavier NX to make same vide analyses with opencv. I tried to build a python programm, using python 3.9.25, and opencv 4.12.0. I have raspi cam’s on both sockets, but none of them seems to return a frame.

my code is rather simple

import cv2
print(cv2.__version__)
cam1Set = 'nvarguscamerasrc sensor-id=0 ! video/x-raw(memory:NVMM), width=3264, geight=2464, framerate=21/1, format=NV12 ! nvvidconv flip-method=2 ! video/x-raw, width=800, height=600, format=BGRx ! videoconvert ! video/x-raw, format=BGR ! appsink'

cam1=cv2.VideoCapture(cam1Set)

while True:
    _, frame1 = cam1.read()

    cv2.imshow('cam1', frame1)
    cv2.moveWindow('cam',0,0)

    if cv2.waitKey(1) == ord('q'):
        break
cam1.release()
cv2.destroyAllWindows()

but i get the following error :

Traceback (most recent call last):
  File "/home/marc/Development/Python/pypro/initial.py", line 10, in <module>
    cv2.imshow('cam1', frame1)
cv2.error: OpenCV(4.12.0) /io/opencv/modules/highgui/src/window.cpp:973: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'imshow'

my jetpack version :

Package: nvidia-jetpack
Version: 5.1.1-b56
Architecture: arm64
Maintainer: NVIDIA Corporation
Installed-Size: 194
Depends: nvidia-jetpack-runtime (= 5.1.1-b56), nvidia-jetpack-dev (= 5.1.1-b56)
Homepage: http://developer.nvidia.com/jetson
Priority: standard
Section: metapackages
Filename: pool/main/n/nvidia-jetpack/nvidia-jetpack_5.1.1-b56_arm64.deb
Size: 29304
SHA256: 7b6c8c6cb16028dcd141144b6b0bbaa762616d0a47aafa3c3b720cb02b2c8430
SHA1: 387e4e47133c4235666176032af0f2ec86461dbb
MD5sum: 0a8692031bf35cc46f7a498e2937bda9
Description: NVIDIA Jetpack Meta Package
Description-md5: ad1462289bdbc54909ae109d1d32c0a8

cv2.getBuildInformation() returns :

General configuration for OpenCV 4.12.0 =====================================
  Version control:               4.12.0-dirty

  Extra modules:
    Location (extra):            /io/opencv_contrib/modules
    Version control (extra):     4.12.0

  Platform:
    Timestamp:                   2025-07-04T17:00:56Z
    Host:                        Linux 6.8.0-51-generic aarch64
    CMake:                       4.0.3
    CMake generator:             Unix Makefiles
    CMake build tool:            /bin/gmake
    Configuration:               Release
    Algorithm Hint:              ALGO_HINT_ACCURATE

  CPU/HW features:
    Baseline:                    NEON FP16
      requested:                 DETECT
    Dispatched code generation:  NEON_DOTPROD NEON_FP16 NEON_BF16
      requested:                 NEON_FP16 NEON_BF16 NEON_DOTPROD
      NEON_DOTPROD (2 files):    + NEON_DOTPROD
      NEON_FP16 (2 files):       + NEON_FP16
      NEON_BF16 (0 files):       + NEON_BF16

  C/C++:
    Built as dynamic libs?:      NO
    C++ standard:                11
    C++ Compiler:                /opt/rh/devtoolset-10/root/usr/bin/c++  (ver 10.2.1)
    C++ flags (Release):         -Wl,-strip-all   -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -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):           -Wl,-strip-all   -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -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:                  /opt/rh/devtoolset-10/root/usr/bin/cc
    C flags (Release):           -Wl,-strip-all   -fsigned-char -W -Wall -Wreturn-type -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -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):             -Wl,-strip-all   -fsigned-char -W -Wall -Wreturn-type -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -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):      -L/ffmpeg_build/lib  -Wl,--gc-sections -Wl,--as-needed -Wl,--no-undefined  
    Linker flags (Debug):        -L/ffmpeg_build/lib  -Wl,--gc-sections -Wl,--as-needed -Wl,--no-undefined  
    ccache:                      YES
    Precompiled headers:         NO
    Extra dependencies:          /usr/lib64/libopenblas.so Qt5::Test Qt5::Concurrent avif /usr/local/lib/libpng.so /usr/lib64/libz.so Qt5::Core Qt5::Gui Qt5::Widgets Iconv::Iconv dl m pthread rt
    3rdparty dependencies:       libprotobuf ade ittnotify libjpeg-turbo libwebp libtiff libopenjp2 IlmImf tegra_hal

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

  GUI:                           QT5
    QT:                          YES (ver 5.15.16 )
      QT OpenGL support:         NO
    GTK+:                        NO
    VTK support:                 NO

  Media I/O: 
    ZLib:                        /usr/lib64/libz.so (ver 1.2.7)
    JPEG:                        build-libjpeg-turbo (ver 3.1.0-70)
      SIMD Support Request:      YES
      SIMD Support:              YES
    WEBP:                        build (ver decoder: 0x0209, encoder: 0x020f, demux: 0x0107)
    AVIF:                        avif (ver 1.3.0)
    PNG:                         /usr/local/lib/libpng.so (ver 1.6.48)
    TIFF:                        build (ver 42 - 4.6.0)
    JPEG 2000:                   build (ver 2.5.3)
    OpenEXR:                     build (ver 2.3.0)
    GIF:                         YES
    HDR:                         YES
    SUNRASTER:                   YES
    PXM:                         YES
    PFM:                         YES

  Video I/O:
    FFMPEG:                      YES
      avcodec:                   YES (59.37.100)
      avformat:                  YES (59.27.100)
      avutil:                    YES (57.28.100)
      swscale:                   YES (6.7.100)
      avresample:                NO
    GStreamer:                   NO
    v4l/v4l2:                    YES (linux/videodev2.h)

  Parallel framework:            pthreads

  Trace:                         YES (with Intel ITT(3.25.4))

  Other third-party libraries:
    Lapack:                      YES (/usr/lib64/libopenblas.so)
    Eigen:                       NO
    Custom HAL:                  YES (carotene (ver 0.0.1))
    Protobuf:                    build (3.19.1)
    Flatbuffers:                 builtin/3rdparty (23.5.9)

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

  Python 3:
    Interpreter:                 /opt/python/cp39-cp39/bin/python3.9 (ver 3.9.23)
    Libraries:                   libpython3.9m.a (ver 3.9.23)
    Limited API:                 YES (ver 0x03060000)
    numpy:                       /home/ci/.local/lib/python3.9/site-packages/numpy/_core/include (ver 2.0.2)
    install path:                python/cv2/python-3

  Python (for build):            /opt/python/cp39-cp39/bin/python3.9

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

  Install to:                    /io/_skbuild/linux-aarch64-3.9/cmake-install
-----------------------------------------------------------------

every help, getting me up and running would be highly appreciated

[kayccc]

Sorry for the late response.
Is this still an issue to support? Any result can be shared?

[kimberly.carvajal]

Hi @jetson1,

Have you tried testing the pipeline using gst-launch to confirm that it is running correctly?

I noticed a typo in your pipeline in the height setting. You can test the pipeline using:

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! “video/x-raw(memory:NVMM), width=3264, height=2464, framerate=21/1, format=NV12” ! nvvidconv flip-method=2 ! video/x-raw, width=800, height=600, format=BGRx ! videoconvert ! video/x-raw, format=BGR ! appsink

cam1.read() may be returning False due to an issue with the pipeline, can you confirm if it works using gst-launch?

Regards,
Kimberly Carvajal
Embedded SW Engineer at RidgeRun
Contact us: support@ridgerun.com
Developers wiki: https://developer.ridgerun.com/
Website: www.ridgerun.com

[jetson1]

hi, i tried the following command from the command line :

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! "video/x-raw(memory:NVMM), width=3264, height=2464, framerate=21/1, format=NV12" ! nvvidconv flip-method=2 ! video/x-raw, width=800, height=600, format=BGRx ! videoconvert ! video/x-raw, format=BGR ! appsink

and here are the results :

Setting pipeline to PAUSED …Pipeline is live and does not need PREROLL …Setting pipeline to PLAYING …New clock: GstSystemClockGST_ARGUS: Creating output streamCONSUMER: Waiting until producer is connected…GST_ARGUS: Available Sensor modes :GST_ARGUS: 3280 x 2464 FR = 21,000000 fps Duration = 47619048 ; Analog Gain range min 1,000000, max 10,625000; Exposure Range min 13000, max 683709000;

GST_ARGUS: 3280 x 1848 FR = 28,000001 fps Duration = 35714284 ; Analog Gain range min 1,000000, max 10,625000; Exposure Range min 13000, max 683709000;

GST_ARGUS: 1920 x 1080 FR = 29,999999 fps Duration = 33333334 ; Analog Gain range min 1,000000, max 10,625000; Exposure Range min 13000, max 683709000;

GST_ARGUS: 1640 x 1232 FR = 29,999999 fps Duration = 33333334 ; Analog Gain range min 1,000000, max 10,625000; Exposure Range min 13000, max 683709000;

GST_ARGUS: 1280 x 720 FR = 59,999999 fps Duration = 16666667 ; Analog Gain range min 1,000000, max 10,625000; Exposure Range min 13000, max 683709000;

GST_ARGUS: Running with following settings:Camera index = 0Camera mode  = 0Output Stream W = 3280 H = 2464seconds to Run    = 0Frame Rate = 21,000000GST_ARGUS: Setup Complete, Starting captures for 0 secondsGST_ARGUS: Starting repeat capture requests.CONSUMER: Producer has connected; continuing.WARNING: from element /GstPipeline:pipeline0/GstAppSink:appsink0: Pipeline construction is invalid, please add queues.Additional debug info:gstbasesink.c(1209): gst_base_sink_query_latency (): /GstPipeline:pipeline0/GstAppSink:appsink0:Not enough buffering available for  the processing deadline of 0:00:00.020000000, add enough queues to buffer  0:00:00.020000000 additional data. Shortening processing latency to 0:00:00.000000000.

I then use that command in my python program like so

camSet1='nvarguscamerasrc sensor-id=0 ! "video/x-raw(memory:NVMM), width=3264, height=2464, framerate=21/1, format=NV12" ! nvvidconv flip-method=2 ! video/x-raw, width=800, height=600, format=BGRx ! videoconvert ! video/x-raw, format=BGR ! appsink')
cam1=cv2.VideoCapture(camSet1)
while True:
    _, frame1 = cam1.read()
    cv2.imshow('cam1', frame1)
    cv2.moveWindow('cam',0,0)
if cv2.waitKey(1) == ord('q'):
break
cam1.release()
cv2.destroyAllWindows()

but get the following error

4.12.0Traceback (most recent call last):File “/home/marc/Development/Python/pypro/test-picam1.py”, line 38, in cv2.imshow(‘cam1’, frame1)cv2.error: OpenCV(4.12.0) /io/opencv/modules/highgui/src/window.cpp:973: error: (-215:Assertion failed) size.width>0 && size.height>0 in function ‘imshow’

this command, when launched from terminal shows the video :

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! ‘video/x-raw(memory:NVMM),framerate=30/1,format=NV12’ ! nvvidconv ! xvimagesink

but generates the same error in the python file

4.12.0Traceback (most recent call last):File “/home/marc/Development/Python/pypro/test-picam1.py”, line 38, in cv2.imshow(‘cam1’, frame1)cv2.error: OpenCV(4.12.0) /io/opencv/modules/highgui/src/window.cpp:973: error: (-215:Assertion failed) size.width>0 && size.height>0 in function ‘imshow’

when running

import cv2
print(cv2.__version__)
print(cv2.getBuildInformation())

I get the following result

4.12.0

General configuration for OpenCV 4.12.0 =====================================
  Version control:               4.12.0-dirty

  Platform:
    Timestamp:                   2025-07-04T16:42:37Z
    Host:                        Linux 6.8.0-51-generic aarch64
    CMake:                       4.0.3
    CMake generator:             Unix Makefiles
    CMake build tool:            /bin/gmake
    Configuration:               Release
    Algorithm Hint:              ALGO_HINT_ACCURATE

  CPU/HW features:
    Baseline:                    NEON FP16
      requested:                 DETECT
    Dispatched code generation:  NEON_DOTPROD NEON_FP16 NEON_BF16
      requested:                 NEON_FP16 NEON_BF16 NEON_DOTPROD
      NEON_DOTPROD (2 files):    + NEON_DOTPROD
      NEON_FP16 (2 files):       + NEON_FP16
      NEON_BF16 (0 files):       + NEON_BF16

  C/C++:
    Built as dynamic libs?:      NO
    C++ standard:                11
    C++ Compiler:                /opt/rh/devtoolset-10/root/usr/bin/c++  (ver 10.2.1)
    C++ flags (Release):         -Wl,-strip-all   -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -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):           -Wl,-strip-all   -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -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:                  /opt/rh/devtoolset-10/root/usr/bin/cc
    C flags (Release):           -Wl,-strip-all   -fsigned-char -W -Wall -Wreturn-type -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -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):             -Wl,-strip-all   -fsigned-char -W -Wall -Wreturn-type -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -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):      -L/ffmpeg_build/lib  -Wl,--gc-sections -Wl,--as-needed -Wl,--no-undefined  
    Linker flags (Debug):        -L/ffmpeg_build/lib  -Wl,--gc-sections -Wl,--as-needed -Wl,--no-undefined  
    ccache:                      YES
    Precompiled headers:         NO
    Extra dependencies:          /usr/lib64/libopenblas.so Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Test Qt5::Concurrent avif /usr/local/lib/libpng.so /usr/lib64/libz.so dl m pthread rt
    3rdparty dependencies:       libprotobuf ade ittnotify libjpeg-turbo libwebp libtiff libopenjp2 IlmImf tegra_hal

  OpenCV modules:
    To be built:                 calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching video videoio
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 java python2 ts
    Applications:                -
    Documentation:               NO
    Non-free algorithms:         NO

  GUI:                           QT5
    QT:                          YES (ver 5.15.16 )
      QT OpenGL support:         NO
    GTK+:                        NO
    VTK support:                 NO

  Media I/O: 
    ZLib:                        /usr/lib64/libz.so (ver 1.2.7)
    JPEG:                        build-libjpeg-turbo (ver 3.1.0-70)
      SIMD Support Request:      YES
      SIMD Support:              YES
    WEBP:                        build (ver decoder: 0x0209, encoder: 0x020f, demux: 0x0107)
    AVIF:                        avif (ver 1.3.0)
    PNG:                         /usr/local/lib/libpng.so (ver 1.6.48)
    TIFF:                        build (ver 42 - 4.6.0)
    JPEG 2000:                   build (ver 2.5.3)
    OpenEXR:                     build (ver 2.3.0)
    GIF:                         YES
    HDR:                         YES
    SUNRASTER:                   YES
    PXM:                         YES
    PFM:                         YES

  Video I/O:
    FFMPEG:                      YES
      avcodec:                   YES (59.37.100)
      avformat:                  YES (59.27.100)
      avutil:                    YES (57.28.100)
      swscale:                   YES (6.7.100)
      avresample:                NO
    GStreamer:                   NO
    v4l/v4l2:                    YES (linux/videodev2.h)

  Parallel framework:            pthreads

  Trace:                         YES (with Intel ITT(3.25.4))

  Other third-party libraries:
    Lapack:                      YES (/usr/lib64/libopenblas.so)
    Eigen:                       NO
    Custom HAL:                  YES (carotene (ver 0.0.1))
    Protobuf:                    build (3.19.1)
    Flatbuffers:                 builtin/3rdparty (23.5.9)

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

  Python 3:
    Interpreter:                 /opt/python/cp39-cp39/bin/python3.9 (ver 3.9.23)
    Libraries:                   libpython3.9m.a (ver 3.9.23)
    Limited API:                 YES (ver 0x03060000)
    numpy:                       /home/ci/.local/lib/python3.9/site-packages/numpy/_core/include (ver 2.0.2)
    install path:                python/cv2/python-3

  Python (for build):            /opt/python/cp39-cp39/bin/python3.9

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

  Install to:                    /io/_skbuild/linux-aarch64-3.9/cmake-install
-----------------------------------------------------------------

could this be a problem ? and how to solve it :

    GStreamer:                   NO

regards

[kimberly.carvajal]

Hi @jetson1,

Yes, looks like that is an issue, opencv was build without GStreamer support, this can be causing cam.read() returns an empty frame1.

You can rebuild opencv to add gstreamer support, you can use the following wiki Compiling_OpenCV_from_Source, make sure to add -D WITH_GSTREAMER=ON \ to your cmake command.

Once the Gstreamer support is added you can use the following pipeline:

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! “video/x-raw(memory:NVMM), width=3264, height=2464, framerate=21/1, format=NV12” ! queue leaky=2 ! nvvidconv flip-method=2 ! video/x-raw, width=800, height=600, format=BGRx ! queue leaky=2 ! videoconvert ! video/x-raw, format=BGR ! appsink

Regards,
Kimberly Carvajal
Embedded SW Engineer at RidgeRun
Contact us: support@ridgerun.com
Developers wiki: https://developer.ridgerun.com/
Website: www.ridgerun.com

[jetson1]

I followed the compilation wiki.

and used the following cmake command

cmake -B build -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_GENERATE_PKGCONFIG=ON -D BUILD_EXAMPLES=OFF -D INSTALL_PYTHON_EXAMPLES=OFF -D INSTALL_C_EXAMPLES=OFF -D PYTHON_EXECUTABLE=$(which python2) -D BUILD_opencv_python2=OFF -D PYTHON3_EXECUTABLE=$(which python3) -D PYTHON3_INCLUDE_DIR=$(python3 -c “from distutils.sysconfig import get_python_inc; print(get_python_inc())”) -D PYTHON3_PACKAGES_PATH=$(python3 -c “from distutils.sysconfig import get_python_lib; print(get_python_lib())”) -D OPENCV_EXTRA_MODULES_PATH=/home/marc/opencv_contrib/modules/ -D WITH_GSTREAMER=ON -D WITH_CUDA=ON

during this process i saw:

GStreamer: YES (1.16.3)

and

…

NVIDIA CUDA: YES (ver 11.4, CUFFT CUBLAS)
– NVIDIA GPU arch: 72
– NVIDIA PTX archs:

– cuDNN: YES (ver 8.6.0)

…

– Python 3:
– Interpreter: /home/marc/.pyenv/shims/python3 (ver 3.8.10)
– Libraries: /usr/lib/aarch64-linux-gnu/libpython3.8.so (ver 3.8.10)
– numpy: /usr/lib/python3/dist-packages/numpy/core/include (ver 1.17.4)
– install path: /usr/lib/python3/dist-packages/cv2/python-3.8

– Python (for build): /usr/bin/python2

when running /usr/local/bin/opencv_version i get 4.6.0-dev

i try

gst-launch-1.0 nvarguscamerasrc sensor-id=0 ! “video/x-raw(memory:NVMM), width=3264, height=2464, framerate=21/1, format=NV12” ! nvvidconv flip-method=2 ! video/x-raw, width=800, height=600, format=BGRx ! videoconvert ! video/x-raw, format=BGR ! appsink

but get no image

when running python (virtual environment) with the following code

import cv2

print(cv2._version_)

print(cv2.getBuildInformation())

i get

4.12.0

General configuration for OpenCV 4.12.0 =====================================
Version control: 4.12.0-dirty

Platform:
Timestamp: 2025-07-04T16:42:37Z
Host: Linux 6.8.0-51-generic aarch64
CMake: 4.0.3
CMake generator: Unix Makefiles
CMake build tool: /bin/gmake
Configuration: Release
Algorithm Hint: ALGO_HINT_ACCURATE

CPU/HW features:
Baseline: NEON FP16
requested: DETECT
Dispatched code generation: NEON_DOTPROD NEON_FP16 NEON_BF16
requested: NEON_FP16 NEON_BF16 NEON_DOTPROD
NEON_DOTPROD (2 files): + NEON_DOTPROD
NEON_FP16 (2 files): + NEON_FP16
NEON_BF16 (0 files): + NEON_BF16

C/C++:
Built as dynamic libs?: NO
C++ standard: 11
C++ Compiler: /opt/rh/devtoolset-10/root/usr/bin/c++ (ver 10.2.1)
C++ flags (Release): -Wl,-strip-all -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -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): -Wl,-strip-all -fsigned-char -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -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: /opt/rh/devtoolset-10/root/usr/bin/cc
C flags (Release): -Wl,-strip-all -fsigned-char -W -Wall -Wreturn-type -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -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): -Wl,-strip-all -fsigned-char -W -Wall -Wreturn-type -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -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): -L/ffmpeg_build/lib -Wl,–gc-sections -Wl,–as-needed -Wl,–no-undefined
Linker flags (Debug): -L/ffmpeg_build/lib -Wl,–gc-sections -Wl,–as-needed -Wl,–no-undefined
ccache: YES
Precompiled headers: NO
Extra dependencies: /usr/lib64/libopenblas.so Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Test Qt5::Concurrent avif /usr/local/lib/libpng.so /usr/lib64/libz.so dl m pthread rt
3rdparty dependencies: libprotobuf ade ittnotify libjpeg-turbo libwebp libtiff libopenjp2 IlmImf tegra_hal

OpenCV modules:
To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching video videoio
Disabled: world
Disabled by dependency: -
Unavailable: java python2 ts
Applications: -
Documentation: NO
Non-free algorithms: NO

GUI: QT5
QT: YES (ver 5.15.16 )
QT OpenGL support: NO
GTK+: NO
VTK support: NO

Media I/O:
ZLib: /usr/lib64/libz.so (ver 1.2.7)
JPEG: build-libjpeg-turbo (ver 3.1.0-70)
SIMD Support Request: YES
SIMD Support: YES
WEBP: build (ver decoder: 0x0209, encoder: 0x020f, demux: 0x0107)
AVIF: avif (ver 1.3.0)
PNG: /usr/local/lib/libpng.so (ver 1.6.48)
TIFF: build (ver 42 - 4.6.0)
JPEG 2000: build (ver 2.5.3)
OpenEXR: build (ver 2.3.0)
GIF: YES
HDR: YES
SUNRASTER: YES
PXM: YES
PFM: YES

Video I/O:
FFMPEG: YES
avcodec: YES (59.37.100)
avformat: YES (59.27.100)
avutil: YES (57.28.100)
swscale: YES (6.7.100)
avresample: NO
GStreamer: NO
v4l/v4l2: YES (linux/videodev2.h)

Parallel framework: pthreads

Trace: YES (with Intel ITT(3.25.4))

Other third-party libraries:
Lapack: YES (/usr/lib64/libopenblas.so)
Eigen: NO
Custom HAL: YES (carotene (ver 0.0.1))
Protobuf: build (3.19.1)
Flatbuffers: builtin/3rdparty (23.5.9)

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

Python 3:
Interpreter: /opt/python/cp39-cp39/bin/python3.9 (ver 3.9.23)
Libraries: libpython3.9m.a (ver 3.9.23)
Limited API: YES (ver 0x03060000)
numpy: /home/ci/.local/lib/python3.9/site-packages/numpy/_core/include (ver 2.0.2)
install path: python/cv2/python-3

Python (for build): /opt/python/cp39-cp39/bin/python3.9

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

Install to: /io/_skbuild/linux-aarch64-3.9/cmake-install

so still not working as expected

[AastaLLL]

Hi,

Is this a duplicate of the below topic?

Python opencv on jetpack 5.1.4

Hi, I want to reactivate my old Xavier NX to build a robot head. I want to use 2 pi cameras for the eyes. Does the jetpack 5.1.4 or 5.1.5 support python opencv with gstreamer and cuda support ? I have a version of the jetpack installed, but i don’t know why, but the installed python opencv version does not support gstreamer, and all new rebuilds failed so far. I have no decided to start from a fresh jetpack version.

If yes, let’s continue the discussion there.

Thanks.