Unable to run opencv with detectron on jetson xavier nx

[jayashankar2110]

This is the wat the terminal shows when i run the code

(python3:3543): GStreamer-WARNING **: 10:38:24.675: Failed to load plugin ‘/usr/lib/aarch64-linux-gnu/gstreamer-1.0/libgstnvarguscamerasrc.so’: /lib/aarch64-linux-gnu/libGLdispatch.so.0: cannot allocate memory in static TLS block

(python3:3543): GStreamer-WARNING **: 10:38:24.683: Failed to load plugin ‘/usr/lib/aarch64-linux-gnu/gstreamer-1.0/libgstnvvidconv.so’: /lib/aarch64-linux-gnu/libGLdispatch.so.0: cannot allocate memory in static TLS block
[ WARN:0] global …/modules/videoio/src/cap_gstreamer.cpp (713) open OpenCV | GStreamer warning: Error opening bin: no element “nvarguscamerasrc”
[ WARN:0] global …/modules/videoio/src/cap_gstreamer.cpp (480) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created
[ERROR:0] global …/modules/videoio/src/cap.cpp (116) open VIDEOIO(CV_IMAGES): raised OpenCV exception:

OpenCV(4.2.0) …/modules/videoio/src/cap_images.cpp:253: error: (-5:Bad argument) CAP_IMAGES: can’t find starting number (in the name of file): nvarguscamerasrc ! video/x-raw(memory:NVMM), width=326 4, height=2464, format=NV12, framerate=21/1 ! nvvidconv flip-method=2 ! video/x-raw, width=320, height=240, format=BGRx ! videoconvert ! video/x- raw, format=BGR ! appsink in function ‘icvExtractPattern’

Traceback (most recent call last):
File “pom-ai_1.py”, line 71, in
cv2.imwrite(filename, frame)
cv2.error: OpenCV(4.2.0) …/modules/imgcodecs/src/loadsave.cpp:715: error: (-215:Assertion failed) !_img.empty() in function ‘imwrite’

[DaneLLL]

Hi,

@jayashankar2110

OpenCV(4.2.0) …/modules/videoio/src/cap_images.cpp:253: error: (-5:Bad argument) CAP_IMAGES: can’t find starting number (in the name of file): nvarguscamerasrc ! video/x-raw(memory:NVMM), width=326 4, height=2464, format=NV12, framerate=21/1 ! nvvidconv flip-method=2 ! video/x-raw, width=320, height=240, format=BGRx ! videoconvert ! video/x- raw, format=BGR ! appsink in function ‘icvExtractPattern’

The error print shows gstreamer is not enabled in OpenCV. You may try to use the default OpenCV package installed through SDKManager.

[jayashankar2110]

but print(cv2.getBuildInformation())
shows gstreamer is enabled in opencv
bdw opencv works perfectly to check the camera ,it shows this error only when running with detectron2

[DaneLLL]

Hi,
Please try the sample:
[Gstreamer] nvvidconv, BGR as INPUT - #4 by DaneLLL

If above sample can be run successfully, it may be an issue in the detecton2 sample.

[Honey_Patouceul]

@jayashankar2110

/lib/aarch64-linux-gnu/libGLdispatch.so.0: cannot allocate memory in static TLS block

You may try:

LD_PRELOAD=/lib/aarch64-linux-gnu/libGLdispatch.so  python3 your_app.py

[Honey_Patouceul]

@jayashankar2110

video/x-raw(memory:NVMM), width=326 4,

You would remove the extra space → width=3264