When connect Visual Studio with openCV there is an error message "opencv_core220.dll is missing".
How can I find this file?
What is its location?
Why this message was generated?
What wrong steps that I made during connecting openCV and VS?
It should be under path
OpenCV-Path \build\x64 or x86\vc10 or vc11\bin
p.s.: Use x64 if you compile your project under x64, and x86 for Win32. Use vc10 for VS2010 and vc11 for VS2012.
To make it work, you should do one of the following steps:
Add this path to Path environment variable.
Add this path to your project's Debugging Environment.
Copy opencv_core220.dll to the output folder of your project.
So, the paths were already described above by herohuyongtao
For more that it's an old situation when adding opencv in VS, it's still occurs.
I got the same problem when trying OpenCV 3.4.5 / VS2017 and another way to get it solved when the usual paths just don't is to go to:
LINKER -> INPUT -> DelayLoadDlls and insert the specified DLL there.
Using Delay DLL to solve missing DLL problems (opencv) | post by TIJOLO Stack Overflow
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I just built the project that I'm supposed to fix. I double checked that correct DLLs are loaded - the project uses Qt 5.3.0, and the dlls are loaded from 5.3.0 directory. I am not sure where is the problem. Is my project using incorrect Qt headers? Or is the DLL build incorrectly?
I'm building in Debug with Visual Studio 2017. The DLLs are also built with visual studio. I tried Vidual Studio 2010 instead, since it's 2010 project, but the error was the same.
Are you in release or debug mode? QtCoded.dll is related to debug profile.
Another explanation could be how your Qt was built.
If I remember correctly Qt was built with msvc2015 so you have to use msvc2015 to build your exe with Visual Studio and it is not possible to use a msvc version before or after that.
Please remeber that you can't use the Qt framework built with mingw with msvc.
In other words I suggest you to check which version of msvc are you using with Visual Studio and which version of Qt framework.
Regards.
In my case, the problem was following:
One of the sub-projects was accidentally configured to use Qt 5.6.1, whereas the rest of the solution used 5.3.0. I found out by opening the result binary in dependency walker.
I just had the same problem with QT 4.
The solution was found on this post: The procedure entry point could not be found
I ran into the same problem, and in my case, this was due to the fact that I had two versions of the same library installed on my computer.
In the end, the problem was that I was linking my program against the new LIB file while my PATH was pointing to the old DLL. When the library version number is not included in the LIB or DLL file names, it is very easy to mix the versions.
I my case I was using a QtCored4.dll and others from an older version of QT. The solution was copy the DLLs directly from my QT installation directory which was used to build the application (as it was set by my QTDIR environment variable): C:\Qt\4.8.7\bin to my application directory.
I am using visual studio 2010 under Win7-64bit to build an application with openCV. I finished development and build the release version without error. I also successfully run the program in debug mode. I then move the .exe file to other directory in the same computer. I run it in cmd.exe and I got error warning: Error opening file <../../modules/highgui/src/cap_ffmpeg_implhpp:537>
I guess there are some dependence with some libraries of openCV but I don't how to solve it. My final task is that I can use that .exe in another computer under Win7 directly. How to do it?
I found a similar question here. But I don't have .dll file built, so what should I do to solve this problem?
Building an OpenCV app with shared libs (DLLs) require the DLLs to be available (same folder or in lookup path) to the exe when it is run.
If you are using static linking then you don't need any of the OpenCV DLLs to be reachable. However, due to licensing issues, ffmpeg is linked dynamically even when the rest of the libs are linked statically, and thus, you need to have the ffmpeg DLL available for the exe. It is called something like opencv_ffmpeg*.dll.
Note that this is only needed if you are using highgui related functionality.
I have the following scenario:
Visual Studio 2010 solution with one WPF-project, output file is "Tool.exe"
Eclipse Shared Library project, output file is "Tool.dll"
I place the dll in the same folder as the exe and then I try to debug using Visual Studio; but I get the following error:
Error while trying to run project: Could not load file or assembly 'Tool' or one of its dependencies. The module was expected to contain an assembly manifest.
I have managed to find a solution to the problem, rename the dll, apparently the exe and dll cannot have the same name. My question is, why is this error occuring in the first place? Why does the name of the dll affect Visual Studio? The error occurs before even trying to pinvoke the dll. If I run my application without Visual Studio it works perfectly, but I want to be able to debug it of course.
Right now renaming the dll is plan B, but before I do that I would like to know if there is anything else I can do to fix this problem?
Thanks in advance.
I found simple steps to solve this error.
1- change your windows.
2- install Symantec Endpoint Protection Client 12.1.6318.6100 x32 or x64 bit.
You can geting it software(32 bit) from link: (ftp://192.168.168.215/Public/Antivirus/Symantec/Symantec Endpoint Protection Client 12.1.6318.6100 x86.rar)
drag and drop it to your software(IE ,....) to work.
3- install all driver on your computer.
4- install Visual studio.
End
I have been trying to run OpenCV through MVS 2012 with no succeess.
Here is an error i get:
1>LINK : fatal error LNK1104: cannot open file 'opencv_core242d.lib' 1> 1>Build FAILED.
Could someone provide me a tutorial? or how can i solve this problem?
I've written a blog post on Using OpenCV 2.4.2 with Visual Studio 2012 on Windows 7 (64-bit). With the step by step instructions provided, I think it should be pretty easy for you to get it done. Feel free to comment if you have any doubts.
Since OpenCV 2.4 does not work well with Visual Studio 2012. I think that's why you always got problems. Actually, it used me a lot of time to make all things work. So I wrote a very simple tutorial about how to use OpenCV 2.43 in Visual Studio 2012. Please check it. Good luck. If you still have questions, ask me again.
http://answers.opencv.org/question/6495/visual-studio-2012-and-rtlfreeheap-error/#6603
Some basic steps...
use cmake to create the .sln or the solution file ...make sure you choose right the compiler in cmake properly...use the address of the cmake file (CMakelist.txt) in the folder containing opencv files..
click on the .sln file (this will be found in the target folder whose path you have set in cmake to contain the build..) and open with VS2012
VS2012 will build your libraries and dlls...add the path of the dlls to the system variable PATH...put the path of the libs in the IDE..and the include files also..
restart VS2012 to make the changes in PATH variable to reflect
You have 2 options - one is to use the precompiled libraries and link them into your VS2012 projects.
The other is to use CMake to make the the right .SLN and .PRJX files so you can simply open them .SLN in VS2012 and compile everything for yourself.
Both have been discussed here, however, to add to the first option, you need to manually edit the top level CMAKElist.txt file with the following lines
if( MSVC ) # VS2012 doesn't support correctly the tuples yet
add_definitions( /D _VARIADIC_MAX=10 )
endif()
Before generating your solution files. This ensures that you don't have problems with the VARIADIC length issue with :tuple - which Visual studio 2012 has issues with.
there may be 2 option to solve your error:
1) You may use opencv 2.4.2 that may have some problems to connect with visual studio 2012
so use newer version of opencv
2) You need to restart your visual studio 2012 so that it can reconfigure its Setting as per requirements.
Can someone link me a good guide for using libraries in a c or c++ project?
Right now I'm trying to add OpenCV to a newly created project. I've added all the directories I can think of in "Project and Solutions -> VC++ Directories" and to make sure I've dragged and dropped all the .lib and .dll files into the project.
The project builds but when I run the simple "Hello, World program" it gives me this error message:
"cv.exe unable to locate component.
This application has failed to start because cv200.dll was not found. Re-installing the application may fix this problem."
How can I really add this cv200.dll? I've dragged&dropped it into the project..
Thanks!
You need to make sure that cv200.dll is in the DLL search path at run time. The easiest way to do this is to put it in the same directory as the built executable. Dragging and dropping a DLL or LIB file into your project has no effect.
MSDN has a good description of the full DLL search order when loading libraries at runtime.
By default during installation OpenCV create env. variable path \bin.
All dll assumed to be in that dir. However you are using OpenCV 2.0, and OpenCV 2.0 installation doesn't include lib and dll files for Visual Studio. You seems already built all dll's and lib's. If you installed OpenCV correctly just move all dll's into \bin (for example C:\Program Files\OpenCV\bin)
If for some reason you are missing some dll or libs here is instruction how to build them
http://mirror2image.wordpress.com/2009/10/20/switching-to-opencv-2-0-with-vs2005/