OAK D LR Support

amin · 2023-07-12T01:08:07+00:00

I recently acquired an OAK-D LR camera, but unfortunately, I have encountered difficulties creating disparity maps, depth maps, or getting any images whatso...

amin

erik
Thanks for the reply.

I can not run depth_preview_lr.py successfully. Only one image shows up and then gets frozen. I have posted the output of the cam_test.py in the above post.

jakaskerl

Hi amin
That's a PyQt5 problem. Try reinstalling pyqt and opencv libraries. I had the same problem and managed to solve it using https://stackoverflow.com/a/46460108. It's annoying a bit since every time I install requirements I have to first uninstall opencv, otherwise it stops working. There should be a workaround to this though, if you find it, please let me know 😉

Hope it helps,
Jaka

amin

This is how I resolved the issue:

I was using the install_requirement.py in the dpethai repository, but it only installs the depthai 2.21.2.0 version. When I upgraded to depthai 2.22.0.0, it started working.

I did try uninstalling the opencv and PyQt5 and reinstalling them again, but it did not help in my case. When I am running cam_test.py, I am still getting the same error, but I am able to run depth map using OAK-D LR camera with the above fix.

jakaskerl

Hi amin
That's great, but I think the thread error will cause further problems when using the SDK.

Thanks,
Jaka

amin

Hi jakaskerl

I agree, and I worked a little bit more on it. The way I fixed the plugins issue was to remove the plugin as suggested in this post: wkentaro/labelme842

Now the cam_test.py works fine and I see the GUI.

Thanks for responding to my questions.

Regards,
Amin

MaggieWang

I have the exact same issue trying to run depth_preview_lr.py, but none of the solutions in the linked post on removing the plugin work for me. When I attempt to run it, I get the following message and one frozen frame:

qt.qpa.plugin: Could not find the Qt platform plugin "wayland" in "/home/owner/.local/lib/python3.10/site-packages/cv2/qt/plugins"

Any advice would be appreciated.

jakaskerl

MaggieWang
What platform are you running on?

Thanks,
Jaka

MaggieWang

Linux, Ubuntu 22.04.3

jakaskerl

Hi MaggieWang
Maybe try manually exporting the path to your pyqt plugins inside the environment you are using.

export QT_QPA_PLATFORM_PLUGIN_PATH=/path/to/your/qt/plugins.

I think this is not really a depthai issue though.

Thanks,
Jaka

MaggieWang

Exporting the path did not work for me. When I use the fix amin used from above, I am able to run cam_test.py, but then depth_preview_lr.py does not work.

I was able to resolve plugin issues for both files by using the fix from here (pyqt5==5.14.2 opencv-python==4.8.0.76), but I still have the original issue with depth_preview_lr.py. Both files throw no errors but when running depth_preview_lr.py, one frame appears, freezes, and eventually gives a message that the application is not responding.

jakaskerl

Hi MaggieWang
Could you pull any changes on depthai-python repo and re-run the install_requirements.py? I can confirm the script should work, so there is likely some weird dependency issue still.

Thanks,
Jaka

MaggieWang

Ah, both work now. Must have been an update I missed. Much appreciated!