How to Check that FFmpeg install correctly?

[nothingnew]

Hi,

I'm trying to build FFmpeg using MSYS2 and MINGW64 in Windows 10 64-bit. How to check that I've done the building process correctly?
I tried to check it by running this code:

$ ffmpeg --version

And I got this result:

ffmpeg version N-86942-geabeb90 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 7.1.0 (Rev2, Built by MSYS2 project)
  configuration: --enable-shared
  libavutil      55. 69.101 / 55. 69.101
  libavcodec     57.102.100 / 57.102.100
  libavformat    57. 76.100 / 57. 76.100
  libavdevice    57.  7.100 / 57.  7.100
  libavfilter     6. 98.100 /  6. 98.100
  libswscale      4.  7.101 /  4.  7.101
  libswresample   2.  8.100 /  2.  8.100
Unrecognized option '-version'.
Error splitting the argument list: Option not found

Does it mean FFmpeg was installed correctly? Or are there any other ways to check?

Thank you...

[Case]

Try single dash

ffmpeg -version