Command line tool to convert SVG to EMF (Enhanced Metafile)
Looks like you can use inkscape from the command lone to do this with the -M switch.
http://tavmjong.free.fr/INKSCAPE/MANUAL/html/CommandLine-Export.html
If you want the exact command to do this here it is:
$ inkscape --file <Input-file> --export-emf <output-file>