Fix error and download avutil-55.dll

ERROR: The application could not start because avutil-55.dll was not found.

ERROR: The entry point to the procedure avutil-55.dll was not found.

ERROR: dllregisterserver entry point not found - how to fix avutil-55.dll

How to register avutil-55.dll in Windows

How to unregister a DLL?

Causes of errors in the file avutil-55.dll