-l list known charsets and exit successfully
-bstring
slides break string. This string (by default - formfeed) would be output at the end of each slide
page.
-dcharset`
- specifies destination charset name. Charset file has format described in CHARACTER SETS section
of catdoc(1) manual page. By default, current locale charset would be used if langinfo support
was enabled at the compile time.
-scharset
- specifies source charset. Typically, PowerPoint files use UNICODE strings with known charsets,
but for some reason you may wish to override it.
-V outputs version number