ffmpegmt.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like ffmpegmt.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like AppInstaller.exe - to follow. These files were created so that multiple programs (eg. Free Opener) could share the same ffmpegmt.dll file, saving valuable memory allocation, therefore making your computer run more efficiently.
Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared DLL file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when ffmpegmt.dll is attempted to be loaded either when Free Opener is starting up, or in some cases already running. Some of the most common ffmpegmt.dll errors include:
- Access Violation at address - ffmpegmt.dll.
- ffmpegmt.dll could not be found.
- Cannot find C:\Program Files (x86)\K-Lite Codec Pack\ffdshow\ffmpegmt.dll.
- Cannot register ffmpegmt.dll.
- Cannot start Free Opener. A required component is missing: ffmpegmt.dll. Please install Free Opener again.
- Failed to load ffmpegmt.dll.
- The application has failed to start because ffmpegmt.dll was not found.
- The file ffmpegmt.dll is missing or corrupt.
- This application failed to start because ffmpegmt.dll was not found. Re-installing the application may fix this problem.
Your ffmpegmt.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Free Opener), or deleted by a malware infection. Furthermore, ffmpegmt.dll file corruption could be caused from a power outage when loading Free Opener, system crash while loading ffmpegmt.dll, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.