slackbuilds/multimedia/gst-plugins-bad

GStreamer Bad Plug-ins is a set of plug-ins that aren't up to par compared
to the rest. They might be close to being good quality, but they're missing
something - be it a good code review, some documentation, a set of tests,
a real live maintainer, or some actual wide use.

gstreamer-plugins-bad will need the following dependencies installed: 
gst-plugins-base, liboil and gstreamer available at slackbuilds.org