Gstreamer is a streaming media framework, based on graphs of filters which operate on media data. applications using this library can do anything from real-time sound processing to playing videos, and just about anything else media-related. its plugin-based architecture means that new data types or processing capabilities can be added simply by installing new plug-ins.

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.