opus-tools requires a certain order of arguments
when encoding with opusenc.exe, version 0.1.6 (using libopus 1.1-alpha) downloaded from mozilla.org, this does not work:
opusenc output.opus infile.wav
and gives the error:
output.opus: No such file or directory
however, this does work:
opusenc infile.wav output.opus
this is not huge at all in my opinion, just causes a little confusion. especially when foobar2000 is involved, which gives the most vague error available.