media-video/sswf-1.8.0 does not contain manpages for the tools. They belong to a separate upstream tarball, sswf-1.8.0-doc.tar.gz.
A patch is on the way.
Created attachment 116659 [details, diff]
The proposed patch for sswf-1.8.0.ebuild adds the manpages to the tools. It also implements the doc USE flag so that some API documentation is added to the package, in form of manpages and html.
This patch does not need Doxygen, for the -doc tarball includes precompiled versions of the documentation.
Fixed in 1.8.0-r1