When an application requires opencv_videoio.dll, Windows will check the application and system folders for this .dll file. If the file is missing you may receive an error and the application may not function properly. Learn how to re-install opencv_videoio.dll.
.DLL Error Example
To fix .dll errors, you can try a few basic steps. While some errors might need more detailed fixes, these initial steps often solve common problems.
Select the .dll version to download. In most cases, this would be the latest version (32/64-bit) from the appropriate company.
Requests can improve your odds of success and increase the speed in which the .dll file is found.
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Because multiple programs can share the same DLL, it helps developers maintain a more portable codebase. Instead of rewriting the same functions, they can link to a DLL.