Deploying project with OpenCV and FFMPEG Error

Clarky

I'm trying to deploy an application that uses opencv and ffmpeg on OSX however I'm getting a crash at run time where the application is looking for a dylib.

Dyld Error Message:
 Library not loaded: /usr/local/Cellar/ffmpeg/4.1.3/lib/libswresample.3.dylib
 Referenced from: /Applications/myApp.app/Contents/Frameworks/libavcodec.58.dylib
 Reason: image not found

I can see all the libraries within the package contents after I've ran macdeploy. I have tried using the intall_name_tool to try and fix this issue with the following command:

install_name_tool -change /usr/local/Cellar/ffmpeg/4.1.3/lib/libswresample.3.dylib 
@executable_path/libswresample.3.dylib  
/Users/me/code/build_output/MyAppQML/myApp.app/Contents/Frameworks/libavcodec.58.dylib

The command runs however when I check the library with otool -L nothing has changed.

@executable_path/../Frameworks/libavcodec.58.dylib (compatibility version 58.0.0, current version 58.35.100)
    /usr/local/Cellar/ffmpeg/4.1.3/lib/libswresample.3.dylib (compatibility version 3.0.0, current version 3.3.100)
    /usr/local/Cellar/ffmpeg/4.1.3/lib/libavutil.56.dylib (compatibility version 56.0.0, current version 56.22.100)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1238.60.2)
    /usr/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 7.0.0)
    @executable_path/../Frameworks/liblzma.5.dylib (compatibility version 8.0.0, current version 8.4.0)
    @executable_path/../Frameworks/libopencore-amrwb.0.dylib (compatibility version 1.0.0, current version 1.3.0)

Am I using the correct parameters for the install_name_tool?
Im using QT 5.12.1 and Xcode 9.4.1.

Im also using this in my shared.pri file:

QT_CONFIG -= no-pkg-config
CONFIG  += link_pkgconfig
PKGCONFIG += opencv

SGaist

Hi and welcome to devnet,

From the looks of it, the command is correct. Note that your new path is wrong, it should be @executable_path/../Frameworks/libswresample.3.dylib

Clarky

@SGaist said in Deploying project with OpenCV and FFMPEG Error:

From the looks of it, the command is correct. Note that your new path is wrong, it should be @executable_path/../Frameworks/libswresample.3.dylib

Hey, thanks for the reply, I fixed my command using your suggestion and managed to get my app working until it comes to the part with opencv where it just crashes.

Dyld Error Message:
 Symbol not found: ___emutls_get_address
 Referenced from: /Applications/myApp.app/Contents/MacOS/../Frameworks/libgomp.1.dylib
 Expected in: /usr/lib/libSystem.B.dylib

I've tried using the tool again to fix this but I'm not sure if that's the correct way to fix the issue as its a symbol issue rather than a library problem?

Clarky

Managed to fix this by using:

install_name_tool -change /usr/local/lib/gcc/8/libgcc_s.1.dylib 
@executable_path/../Frameworks/libgcc_s.1.dylib 
/Applications/myApp.app/Contents/Frameworks/libgomp.1.dylib

libgomp.1.dylib was originally pointing to an older version of gcc inside /usr/local/lib/gcc

Thanks for your help!