Defined in /home/build/jenkins/workspace/RockBootstrap19/FLAVOR/stable/label/DebianUnstable/dev/autoproj/remotes/rock/rock.osdeps as

gstreamer:
    debian,ubuntu:
      - libgstreamer0.10-dev
      - libgstreamer-plugins-base0.10-dev
      - gstreamer0.10-plugins-good
      fedora: gstreamer-devel