player: -1 is a acceptable value for the subtitles track (No subtitles)
player: -1 is a acceptable value for the subtitles track (No subtitles)

lubosz/clutter-gst,skinkie/clutter-gst,skinkie/clutter-gst,GNOME/clutter-gst,ystreet/clutter-gst,skinkie/clutter-gst,lubosz/clutter-gst,GNOME/clutter-gst,lubosz/clutter-gst,ystreet/clutter-gst,GNOME/clutter-gst,ystreet/clutter-gst,ystreet/clutter-gst,GNOME/clutter-gst