This is the current issue, when trying to start "pitivi" from the user shell on Debian jessie/stable system. This happens on a Debian jessie installation, no "pitivi" program was installed before jessie.
$ /usr/bin/pitivi (pitivi:24218): Clutter-WARNING **: clutter_x11_set_use_argb_visual() can only be used before calling clutter_init() (pitivi:24218): Clutter-WARNING **: clutter_x11_set_display() can only be used before calling clutter_init() (pitivi:24218): Clutter-WARNING **: clutter_x11_disable_event_retrieval() can only be used before calling clutter_init() (pitivi:24218): Clutter-WARNING **: clutter_disable_accessibility() can only be called before initializing Clutter. Missing soft dependency: - pycanberra not found on the system -> enables sound notifications when rendering is complete Missing soft dependency: - GnomeDesktop not found on the system -> file thumbnails provided by GNOME's thumbnailers Segmentation fault Kind regards, Jan