Minimserver Properties screen on Windows Server 2012 R2 Core Edition

[Pascal]

I ran the command. It doesn't display anything and just goes to the next line. This made me wonder. Tried launching just 'ffmpeg.exe' and the same thing happened.
Tried it on my other pc(with windows 8.1) and when I typed the command there I got output.

Went back to my w2012 core and converted back to gui mode. Everything worked again. ffmpeg gave the same output as on windows 8.1. Went back to core(using audiophile optimizer) and it didn't work anymore. Went to minimal server interface. Config got lost again, but in that mode I was able to add the streamer.option setting using Minimwatch. My guess is that going to core mode disables something that doesn't allow ffmpeg to run.