OpenCV 4.4.0 macOS Catalina "segmentation fault" #18079
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❯ sw_vers 2.----
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Try to add "python" executable itself ( Do you have other python apps which can work with camera? Do them work? |
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I have the same exact problem as @azataiot . When I updated opencv-python to 4.4.0.40, I got segmentation fault on sw_vers: Python 3.8.2 None of the apps regarding Python (Terminal, Python binary, ...) is listed in Security & Privacy > Privacy > Camera. (And I can't whitelist any app manually, because there's no option for adding to the list). |
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UPDATE: (temp fix) Just checked the previous versions. The issue persists on I guess I continue using '4.3.0.36' for now... |
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@azataiot Could you confirm that it crashes on
Please also try these builds (check |
But I do believe that the problem has something related to Video Capture, because it worked well except trying to capture video from the default camera. And I tried to add a usb camera so that I can check whether it is the problem of the camera, but external camera did not work also. |
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@azataiot You have BTW, without stacktrace info it is hard to move forward here. |
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@alalek Ok so I decided to do a deep debug tomorrow, and let me try to find which part of the CV is causing the problem, then may it will be helpful. Just several minutes before I tried to run the same problem on my Mac book air and it has the os version of 10.15.5, and got the same problem, so I do think it is CV in somewhere causing the problem. If possible, can you give me some internal commands or tools to debug the code in CV ( much more specifically? Or should I run some kind of testing codes either?) |
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I've been able to reproduce the issue on OSX 10.15.6 with opencv-python 4.4.0.40 package from pip (installed in conda environment) 😢 : Problem is not reproduced with opencv 4.4.0 from conda-forge conda channel. But it seems that build from conda-forge does not use Qt highgui backend. cc @skvark |
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Found similar problem: https://riverbankcomputing.com/pipermail/pyqt/2020-January/042419.html Looks like Qt looks for Qt bundle ('org.qt-project.QtCore') and can not find it. Not sure if it is possible to trick it somehow, as I understand Perhaps it is possible to define |
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Yeah, I looked into Qt sources too. That PyQt link was helpful. The issue surfaced in the latest |
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Now, as I tested a lot, I can confirm that the problem was produced by 'cv2.imshow()'. |
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I just encountered similar problem in pycharm. I was using latest version of opencv-python and python 3.7. When i use cv2.imshow(), i got the err: So I installed the 4.3.0.36 version, then cv2.VideoCapture and cv2.imshow() works |
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I can confirm, This works fine when, rolling back to version 4.3.0.36 Please fix this. |
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This issue cannot be fixed in this repository. It's very specific to the unofficial |
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Almost a similar problem I am facing now. The ML/DL Python code was working fine until Mac OS Catalina 10.15.5 is updated to Catalina 10.15.6. After update "zsh: segmentation fault" thrown with a popup window message "Python quit unexpectedly". Details given below. Unfortunately I cannot downgrade my Mac to the older version Catalina 10.15.5 as the system is completely formatted and installed Catalina 10.15.6. Any suggestion to fix this issue?. |
This works fine with Catalina 10.15.6. Thank you very much. |
I can confirm both the issue and the workaround, thank you very much |
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Please try to upgrade to the new 4.4.0.42 release which should have this issue fixed. |
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I've checked package 42 and it works fine. Thank you! |
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opencv-python version 4.5.4.58 still presents this very same issue on Manjaro Linux as of november 2021. After having dowgraded to opencv-python 4.5.3.56 the issue is resolved |
Thanks, I faced this issue on ubuntu 20.04, default install. |
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@magiwanders @bestel74 Please follow the issue here: opencv/opencv-python#572 This issue is related to macOS and has been fixed. |
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PIP opencv-python package issue: opencv/opencv-python#376
System information (version)
Model Name: MacBook Air
Model Identifier: MacBookAir7,2
Processor Name: Dual-Core Intel Core i5
Processor Speed: 1.8 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Hyper-Threading Technology: Enabled
Memory: 8 GB
python --version
Python 3.8.5 [3.7,3.6]
❯ pip --version
pip 20.2.2 from /Users/xxx/.pyenv/versions/3.8.5/envs/AI-3.8.5/lib/python3.8/site-packages/pip (python 3.8)
Python 3.8.5 (default, Aug 12 2020, 19:20:20)
[Clang 11.0.3 (clang-1103.0.32.62)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
Detailed description
Got "[1] 26545 segmentation fault " While running the official OpenCV documentation tutorial code from https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_gui/py_video_display/py_video_display.html
Tested Code:
Error message:
"""
python test.py
[1] 60134 segmentation fault python test.py
╭─ ~/Projects/cv2 ✘ SEGV AI-3.8.5 3.8.5 21:39:57
"""
What I've. tried :
Steps to reproduce
Issue submission checklist
answers.opencv.org, Stack Overflow, etc and have not found solution
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