gstreamer1.0-doc 1.2.3-1 (i386 binary) in ubuntu utopic

 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.
 .
 This package contains documentation for core libraries and elements as
 well as:
  * the GStreamer Manual
  * the GStreamer Plugin Writers Guide
  * Various API docs