There could be a lot of reasons for this Ffmpeg.dll file missing error. but there is also the solution, you can perform these methods to resolve it then too you aren’t able to solve the error, you can see Ffmpeg.dll file missing error solution.
Method1: This is a universal and funny one. “Restart your system”.
Method2: Run a virus scan. (perform a virus scan to see that do virus is affecting the FFmpeg file).
Method3: maybe the last but not least is “reinstall the application”( but this time re-download zip file again ").