POSTIN

/bin/sh

update-alternatives --install /usr/lib64/totem-plugin-viewer totem-mozilla /usr/lib64/totem-plugin-viewer-gstreamer 10

POSTUN

/bin/sh

if [ ! -e "/usr/lib64/totem-plugin-viewer-gstreamer" ]; then
  update-alternatives --remove totem-mozilla /usr/lib64/totem-plugin-viewer-gstreamer
fi