ffmpeg : Complete solution to record/convert/stream audio and video. Includes libavcodec ( https://ffmpeg.org/ )
obs-studio : Software for Recording and Streaming Live Video Content ( https://obsproject.com )
vlc : Media player and framework with support for most multimedia files and streaming ( https://www.videolan.org/vlc/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a bentoo
For Paludis use this rsync : rsync://gentoo.zugaina.org/bentoo-portage
If you have a problem : ycarus(-at-)zugaina.org