batch mode: cannot have " " characters around input path

[unitycoder]

when using batch mode, this fails:
-input="F:\asdf\jrioger"

because https://stackoverflow.com/questions/9287812/backslash-and-quote-in-command-line-arguments/9288040#9288040

this works (but then cannot have spaces on path)
-input=F:\asdf\jrioger\