以下をSynapticから入れる

gstreamer0.10-ffmpeg

gstreamer0.10-gl

gstreamer0.10-plugins-base

gstreamer0.10-plugins-good

gstreamer0.10-plugins-bad

gstreamer0.10-plugins-bad-multiverse

gstreamer0.10-plugins-ugly

gstreamer0.10-plugins-ugly-multiverse

gstreamer0.10-sdl