ffmpeg : Complete solution to record, convert and stream audio and video. Includes libavcodec. ( http://ffmpeg.org/ )
mjpg-streamer : MJPG-streamer, MJPGs from Linux-UVC compatible webcams and RPi ( https://github.com/sarnold/mjpg-streamer )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a arm_support
For Paludis use this rsync : rsync://gentoo.zugaina.org/arm_support-portage
If you have a problem : ycarus(-at-)zugaina.org