media-video/mkvtoolnix should depend on media-libs/libdca and media-libs/aften as both are needed for full functionality of mkvtoolnix. What I did: # emerge =mkvtoolnix-4.8.0 → installed fine. Tried to convert DTS to AC3 with the included mkvdts2ac3.sh from mkvtoolnix package as follows: $ mkvdts2ac3.sh -d -i -n dts_file.mkv > mkvdts2ac3-1.5.1 - by Jake Wharton <jakewharton@gmail.com> and > Chris Hoekstra <chris.hoekstra@gmail.com> > > which: no dcadec in (/bin:/usr/bin) > which: no dcadec in (/bin:/usr/bin) > ERROR: The program 'dcadec' is not in the path. Is dcadec installed? → emerged libdca. Tried again. Got this error: > ERROR: The program 'aften' is not in the path. Is aften installed? → emerged media-libs/aften and it finally worked. Please make mkvtoolnix depend on those packages to ensure proper functionality.
None of the mkvtoolnix ebuilds install the mkvdts2ac3.sh script so they aren't responsible for the script's additional dependencies. The right thing to do would be to write an ebuild for the script using a tarball from the upstream project (which I think is found at [1]). [1] https://github.com/JakeWharton/mkvdts2ac3
