gstreamer1: update to 1.2.1.
gst-plugins-base1: update to 1.2.1.
gst-plugins-good1: update to 1.2.1.
gst-plugins-bad1: update to 1.2.1.
gst-plugins-ugly1: update to 1.2.1.
gst-libav: update to 1.2.1.