openmovieeditor : Open Movie Editor is designed to be a simple tool, that provides basic movie making capabilites. ( http://openmovieeditor.sourceforge.net )
screencastor : capture audio/video of the screen via FFmpeg with GUI ( https://launchpad.net/~hizo/+archive/screencastor )
xjadeo : a simple video player that is synchronized to jack transport. ( http://xjadeo.sourceforge.net/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a proaudio
For Paludis use this rsync : rsync://gentoo.zugaina.org/proaudio-portage
If you have a problem : ycarus(-at-)zugaina.org