Question: Dependencies of the DLLs

[PartyTrix]

Hi,

I'm trying to use your wrapper - and as I can't seem to get the proper libs included in Visual Studio to compile it myself, I tried your included compiled_libraries (for this application: https://github.com/crisie/RecurrentGaze)

Two questions:

• Is my assumption that with your compiled_libraries (OpenFaceDLL.dll and OpenFaceDLL.lib) I should be good to go?
• If so, when I load them using cdll.LoadLibrary(OpenFaceDLL.dll) I get an error:
  "[WinError 126] The specified module could not be found"

Do you have a clue how to resolve this, do I need additional DLL's OpenFaceDLL.dll relies on, in the same folder?

Many thanks in advance!

[crisie]

Hi,

If you've tried to use the compiled_libraries, I assume that you're using Windows, I am right? Otherwise, you need to follow the README instructions for Unix environment.

Then, for the script to find the dll, you need to modify the "path" variable from load_dll.py to point to the location where your dll is located. Also, you need to copy all the OpenFace models and AU_predictors to the same folder where the dll is located. Such models and predictors are part of the OpenFace installer (https://github.com/TadasBaltrusaitis/OpenFace/wiki/Windows-Installation) or source code (https://github.com/TadasBaltrusaitis/OpenFace).

If that does not work, I suggest you try to compile the dll yourself. The libraries needed are part of the OpenFace library (the third party libraries are located at OpenFace/lib/3rdParty of OpenFace framework source code).

Let me know if any of these steps work for you. I'll appreciate any feedback you provide, this way I can update the README properly to make the installation process clearer.

Cristina

[luffymaika]

Hi,

I'm trying to use your wrapper - and as I can't seem to get the proper libs included in Visual Studio to compile it myself, I tried your included compiled_libraries (for this application: https://github.com/crisie/RecurrentGaze)

Two questions:

• Is my assumption that with your compiled_libraries (OpenFaceDLL.dll and OpenFaceDLL.lib) I should be good to go?
• If so, when I load them using cdll.LoadLibrary(OpenFaceDLL.dll) I get an error:
  "[WinError 126] The specified module could not be found"

Do you have a clue how to resolve this, do I need additional DLL's OpenFaceDLL.dll relies on, in the same folder?

Many thanks in advance!

Hi,
According to the author, I can run the program, but the OpenFaceDLL.dll cannot load model files such as mtcnn until I copy all the OpenFace models and AU_predictors to the Program working path.

[PartyTrix]

Hi, thanks for your reply @crisie
Due to the Covid situation, things have been a bit slow on my end - so I haven't had time to work on it since.

What I've tried is copying the files into the folder like so

But that's still not working; should I extract all files from the sub-folders too in the folder that contains the DLL's?

[luffymaika]

Hi，@PartyTrix
I successfully compiled the DLL by myself then set the openfacewrapper_path "OpenFaceWrapper-master\x64\Release". Also I copy all the OpenFace models and AU_predictors to the Program working path(Gaze_estimate\RecurrentGaze) like so:
.
At last, it works.

[crisie]

Hi, @PartyTrix @luffymaika ,

What @luffymaika comments is correct, OpenFace models and AU_predictors need to be copied to the folder in which your main script is located.

OpenFaceDLL dll depends on dlls provided by OpenFace, whose current versions may not be the same as the ones I used to compile the DLL available at compiled_libraries and therefore the dll might fail to load. I have recompiled the library using the current version of OpenFace with Visual Studio 2019, and add it to compiled_libraries folder. Apart from that dll, you will also need to add the dlls generated when compiling OpenFace. To make sure everything works as expected, @PartyTrix , I suggest you follow these steps:
To generate OpenFace libraries and dlls:

1. Download/clone the code from OpenFace (https://github.com/TadasBaltrusaitis/OpenFace).
2. In OpenFace directory, run download_libraries.ps1 on PowerShell.
3. Compile OpenFace using Visual Studio 2017/2019, Release x64.

At this point you can try using the dll from compiled_libraries plus the following dlls from OpenFace. Copy them to the folder in which your main script is located.

1. From your OpenFace folder > x64 > Release, copy flang.dll, flangrti.dll, libomp.dll, and openblas.dll.
2. From your OpenFace folder > lib > 3rdParty > OpenCV > x64 > v141 > bin > Release, copy opencv_world410.dll.
   As commented before, copy as well folders model and AU_predictors from OpenFace folder > x64 > Release. Finally, try running load_dll.py with the dll filepath as command line parameter (for instance python load_dll.py C:/myfolder/OpenFaceDLL.dll).

If that does not work, I suggest again that you compile the wrapper using Visual Studio, carefully changing the include, library and additional dependency paths and files according to your folder structure. The current OpenFace version does not include Boost as 3rdParty anymore, so you have 2 options:

1. Remove the dependency. However, for the build to succeed without boost, C++17 must be used.
2. Download boost from boost webpage and compile it to generate libraries.

Let me know if these steps work for you.

[dark-art]

Getting segmentation fault error when the trackFace method is called from loaded wrapper shared object file, I am able to successfully run the binary files build when i am building from openface repo, what might could have gone wrong?

[dark-art]

Getting segmentation fault error when the trackFace method is called from loaded wrapper shared object file, I am able to successfully run the binary files build when i am building from openface repo, what might could have gone wrong?

OpenFaceWrapper.cpp throws error for me if storing the landmarks results in cv::Mat_double, cv::Mat_float works.