tsinaski@greyskull:~/git_repos/pitivi-git/pitivi$ bin/pitivi

(pitivi:8908): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(pitivi:8908): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(pitivi:8908): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(pitivi:8908): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
pitivi/project.py:359: Warning: g_param_spec_uint64: assertion `default_value >= minimum && default_value <= maximum' failed
  self.timeline = ges.timeline_new_audio_video()
pitivi/project.py:359: Warning: g_object_class_install_property: assertion `G_IS_PARAM_SPEC (pspec)' failed
  self.timeline = ges.timeline_new_audio_video()
Traceback (most recent call last):
  File "bin/pitivi", line 143, in <module>
    _run_pitivi()
  File "bin/pitivi", line 138, in _run_pitivi
    sys.exit(ptv.main(sys.argv))
  File "pitivi/application.py", line 434, in main
    ptv = StartupWizardGuiPitivi(debug=options.debug)
  File "pitivi/application.py", line 377, in __init__
    self.projectManager.newBlankProject(False)
  File "pitivi/project.py", line 236, in newBlankProject
    self.emit("new-project-loaded", self.current)
  File "pitivi/utils/signal.py", line 214, in emit
    *args, **kwargs)
  File "pitivi/utils/signal.py", line 189, in emit
    res = cb(*ar, **kw)
  File "pitivi/mainwindow.py", line 699, in _projectManagerNewProjectLoadedCb
    if self.timeline.duration != 0:
  File "pitivi/timeline/timeline.py", line 852, in getDuration
    return self.timeline.props.duration
AttributeError: 'gobject.GProps' object has no attribute 'duration'