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shimat
MacOS Unable to load shared library 'OpenCvSharpExtern' or one of its dependencies.
MacOS Unable to load shared library 'OpenCvSharpExtern' or one of its dependencies.
Environment
macOS Big Sur 11.6.1
<PackageReference Include="OpenCvSharp4" Version="4.5.5.20211231" />
<PackageReference Include="OpenCvSharp4.runtime.osx.10.15-x64" Version="4.5.5.20211231" />
What did you do when you faced the problem?
- Copied
libOpenCvSharpExtern.dylibfromruntimes/osx-x64/nativetobin/debug/net5.0. - Installed required dependencies manually:
brew install wget pkg-config mono-libgdiplus gtk+ ffmpeg glog yasm harfbuzz jpeg libpng libtiff openjpeg metis openblas opencore-amr protobuf tbb webp
Output:
Warning: wget 1.21.2 is already installed and up-to-date.
To reinstall 1.21.2, run:
brew reinstall wget
Warning: pkg-config 0.29.2_3 is already installed and up-to-date.
To reinstall 0.29.2_3, run:
brew reinstall pkg-config
Warning: mono-libgdiplus 6.1 is already installed and up-to-date.
To reinstall 6.1, run:
brew reinstall mono-libgdiplus
Warning: gtk+ 2.24.33 is already installed and up-to-date.
To reinstall 2.24.33, run:
brew reinstall gtk+
Warning: ffmpeg 4.4.1_5 is already installed and up-to-date.
To reinstall 4.4.1_5, run:
brew reinstall ffmpeg
Warning: glog 0.5.0 is already installed and up-to-date.
To reinstall 0.5.0, run:
brew reinstall glog
Warning: yasm 1.3.0_2 is already installed and up-to-date.
To reinstall 1.3.0_2, run:
brew reinstall yasm
Warning: harfbuzz 3.2.0 is already installed and up-to-date.
To reinstall 3.2.0, run:
brew reinstall harfbuzz
Warning: jpeg 9e is already installed and up-to-date.
To reinstall 9e, run:
brew reinstall jpeg
Warning: libpng 1.6.37 is already installed and up-to-date.
To reinstall 1.6.37, run:
brew reinstall libpng
Warning: libtiff 4.3.0 is already installed and up-to-date.
To reinstall 4.3.0, run:
brew reinstall libtiff
Warning: openjpeg 2.4.0 is already installed and up-to-date.
To reinstall 2.4.0, run:
brew reinstall openjpeg
Warning: metis 5.1.0 is already installed and up-to-date.
To reinstall 5.1.0, run:
brew reinstall metis
Warning: openblas 0.3.19 is already installed and up-to-date.
To reinstall 0.3.19, run:
brew reinstall openblas
Warning: opencore-amr 0.1.5 is already installed and up-to-date.
To reinstall 0.1.5, run:
brew reinstall opencore-amr
Warning: protobuf 3.19.3 is already installed and up-to-date.
To reinstall 3.19.3, run:
brew reinstall protobuf
Warning: tbb 2021.5.0 is already installed and up-to-date.
To reinstall 2021.5.0, run:
brew reinstall tbb
Warning: webp 1.2.2 is already installed and up-to-date.
To reinstall 1.2.2, run:
brew reinstall webp
- Checked dependencies for
libOpenCvSharpExtern.dylib, everything is available.
otool -L libOpenCvSharpExtern.dylib
Output
libOpenCvSharpExtern.dylib:
@rpath/libOpenCvSharpExtern.dylib (compatibility version 0.0.0, current version 0.0.0)
/usr/local/opt/freetype/lib/libfreetype.6.dylib (compatibility version 25.0.0, current version 25.1.0)
/usr/local/opt/harfbuzz/lib/libharfbuzz.0.dylib (compatibility version 30200.0.0, current version 30200.0.0)
/usr/local/opt/tesseract/lib/libtesseract.4.dylib (compatibility version 5.0.0, current version 5.1.0)
/usr/lib/libcurl.4.dylib (compatibility version 7.0.0, current version 9.0.0)
/usr/local/opt/ffmpeg/lib/libavcodec.58.dylib (compatibility version 58.0.0, current version 58.134.100)
/usr/local/opt/ffmpeg/lib/libavformat.58.dylib (compatibility version 58.0.0, current version 58.76.100)
/usr/local/opt/ffmpeg/lib/libavutil.56.dylib (compatibility version 56.0.0, current version 56.70.100)
/usr/local/opt/ffmpeg/lib/libswscale.5.dylib (compatibility version 5.0.0, current version 5.9.100)
/usr/local/opt/ffmpeg/lib/libavresample.4.dylib (compatibility version 4.0.0, current version 4.0.0)
/System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa (compatibility version 1.0.0, current version 23.0.0)
/System/Library/Frameworks/Accelerate.framework/Versions/A/Accelerate (compatibility version 1.0.0, current version 4.0.0)
/System/Library/Frameworks/AVFoundation.framework/Versions/A/AVFoundation (compatibility version 1.0.0, current version 2.0.0)
/System/Library/Frameworks/CoreGraphics.framework/Versions/A/CoreGraphics (compatibility version 64.0.0, current version 1463.2.1)
/System/Library/Frameworks/CoreMedia.framework/Versions/A/CoreMedia (compatibility version 1.0.0, current version 1.0.0)
/System/Library/Frameworks/CoreVideo.framework/Versions/A/CoreVideo (compatibility version 1.2.0, current version 1.5.0)
/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore (compatibility version 1.2.0, current version 1.11.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.60.1)
/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit (compatibility version 45.0.0, current version 2022.20.117)
/System/Library/Frameworks/OpenCL.framework/Versions/A/OpenCL (compatibility version 1.0.0, current version 1.0.0)
/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 904.4.0)
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1770.255.0)
/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation (compatibility version 300.0.0, current version 1770.255.0)
/usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 228.0.0)
- Ensured project is running under 64 bit architecture:
<PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
<PlatformTarget>x64</PlatformTarget>
</PropertyGroup>
- Installed opencv via Homebrew.
- Looked into other closed issues, did not find solution to my problem.
Example code:
Console.WriteLine(Cv2.GetVersionString());
Output:
System.TypeInitializationException: The type initializer for 'OpenCvSharp.Internal.NativeMethods' threw an exception.
---> System.DllNotFoundException: Unable to load shared library 'OpenCvSharpExtern' or one of its dependencies. In order to help diagnose loading problems, consider setting the DYLD_PRINT_LIBRARIES environment variable: dlopen(libOpenCvSharpExtern, 1): image not found
at OpenCvSharp.Internal.NativeMethods.redirectError(CvErrorCallback errCallback, IntPtr userdata, IntPtr& prevUserdata)
at OpenCvSharp.Internal.ExceptionHandler.RegisterExceptionCallback()
at OpenCvSharp.Internal.NativeMethods.LoadLibraries(IEnumerable`1 additionalPaths)
at OpenCvSharp.Internal.NativeMethods..cctor()
--- End of inner exception stack trace ---
at OpenCvSharp.Internal.NativeMethods.core_getVersionString(Byte* buf, Int32 maxLength)
at OpenCvSharp.Cv2.GetVersionString()
What did you intend to be?
Library works and outputs version correctly.
@shimat any ideas what else can be done in order to troubleshoot/fix this issue?
Hello!
You have to use version 4 of tesseract and ffmpeg.
Currently brew installs version 5 which is not compatible with opencv.
Cheers!
As @obie73 said, the OpenCvSharp of version 4.5.5.2021.1213 is not compatible with the installed ffmpeg version 5.x.x. It has to install ffmpeg with version 4.x.x.
There is a cue from loading libOpenCvSharpExtern.dylib test.
❯ ./dyld_open_test /Users/siyao/Documents/astri-workspace/ART340/AstriEndoFormat/cli/bin/Debug/net6.0/runtimes/osx-x64/native/libOpenCvSharpExtern.dylib
dlopen(/Users/siyao/Documents/astri-workspace/ART340/AstriEndoFormat/cli/bin/Debug/net6.0/runtimes/osx-x64/native/libOpenCvSharpExtern.dylib,
1): Library not loaded: /usr/local/opt/ffmpeg/lib/libavcodec.58.dylib
Referenced from: /Users/siyao/Documents/astri-workspace/ART340/AstriEndoFormat/cli/bin/Debug/net6.0/runtimes/osx-x64/native/libOpenCvSharpExtern.dylib
Reason: image not found
dlopen sample%
❯ ll /usr/local/opt/ffmpeg/lib/
total 85168
-rw-r--r-- 1 siyao admin 11M Jul 6 17:08 libavcodec.59.18.100.dylib
lrwxr-xr-x 1 siyao admin 26B Apr 4 22:40 libavcodec.59.dylib -> libavcodec.59.18.100.dylib
After brew install ffmpeg@4, it works out. (Remember link such as ln -s /usr/local/Cellar/ffmpeg@4/4.4.2_3/ /usr/local/opt/ffmpeg)
❯ ll /usr/local/Cellar/ffmpeg@4/4.4.2_3/lib
total 84720
-rw-r--r-- 1 siyao admin 11M Jul 6 17:13 libavcodec.58.134.100.dylib
lrwxr-xr-x 1 siyao admin 27B Apr 15 04:13 libavcodec.58.dylib -> libavcodec.58.134.100.dylib
I'm kinda curious what
@rpath/libOpenCvSharpExtern.dylib (compatibility version 0.0.0, current version 0.0.0)
means
I was getting this problem and one of the errors referred to:
could not find /usr/local/opt/tesseract/lib/tesseract.5.dylib
I did a homebrew install of tesseract
brew install tesseract
and now it works. Only working on a AMD64 (x64) Mac and tested on Monterey and building within "Visual Studio for Mac"
<PackageReference Include="OpenCvSharp4" Version="4.7.0.20230115" />
<PackageReference Include="OpenCvSharp4.runtime.osx.10.15-x64" Version="4.6.0.20230105" />
<PackageReference Include="OpenCvSharp4.runtime.win" Version="4.7.0.20230115" />
FYI: https://www.oreilly.com/library/view/building-computer-vision/9781838644673/95de5b35-436b-4668-8ca2-44970a6e2924.xhtml
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