[Error/MacOS] ImportError: Library not loaded

This post is written by YoungJ-Baek

1. Preface

ImportError is very common error that programmers can face. Usually, it can be resolved via reinstalling the library or redirecting the path. However, in this case, it is related to MacOS. If you are facing the error in the certain environment below, you can try this solution.

• System
  • MacOS: Ventura 13.1
  • Python: 3.10.8
  • Pip: 22.2.2
  • Opencv-python: 4.6.0.66

2. Error

Error Log

ImportError: dlopen(/opt/homebrew/lib/python3.10/site-packages/cv2/python-3.10/cv2.cpython-310-darwin.so, 0x0002): Library not loaded: /opt/homebrew/opt/ffmpeg/lib/libavcodec.59.dylib
  Referenced from: <9FC2913B-81A6-3EF6-8DC3-C221449C5803> /opt/homebrew/Cellar/opencv/4.6.0/lib/libopencv_videoio.4.6.0.dylib
  Reason: tried: '/opt/homebrew/opt/ffmpeg/lib/libavcodec.59.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/opt/homebrew/opt/ffmpeg/lib/libavcodec.59.dylib' (no such file), '/opt/homebrew/opt/ffmpeg/lib/libavcodec.59.dylib' (no such file), '/usr/local/lib/libavcodec.59.dylib' (no such file), '/usr/lib/libavcodec.59.dylib' (no such file, not in dyld cache)

3. Solution

Command

$ brew reinstall rav1e