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[Raoul Snyman <raoul@xxxxxxxxxxx>]

Right. I just reproduced this multiple times. VLC is not installed, nor
is libvlc.

>From the Python 3 console, I can import openlp.core.ui.media.vendor.vlc
without a problem, but try to do anything and it fails. So we need to
actually just try to do something (like get VLC's version) and use that
to determine if VLC is installed or not.

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https://bugs.launchpad.net/bugs/1589675

Title:
  OpenLP on Linux crashes on startup when VLC not installed

Status in OpenLP:
  Confirmed

Bug description:
  Similar to bug #966086

  **OpenLP Bug Report**
  Version: {'build': None, 'version': '2.4.1', 'full': '2.4.1'}

  --- Details of the Exception. ---

  this occurred as OpenLP was opened

   --- Exception Traceback ---
  Traceback (most recent call last):
    File "/usr/bin/openlp", line 44, in <module>
      main()
    File "/usr/share/openlp/openlp/core/__init__.py", line 391, in main
      sys.exit(application.run(qt_args))
    File "/usr/share/openlp/openlp/core/__init__.py", line 142, in run
      Registry().execute('bootstrap_initialise')
    File "/usr/share/openlp/openlp/core/common/registry.py", line 137, in execute
      result = function(*args, **kwargs)
    File "/usr/share/openlp/openlp/core/lib/pluginmanager.py", line 60, in bootstrap_initialise
      self.hook_media_manager()
    File "/usr/share/openlp/openlp/core/lib/pluginmanager.py", line 122, in hook_media_manager
      plugin.create_media_manager_item()
    File "/usr/share/openlp/openlp/core/lib/plugin.py", line 204, in create_media_manager_item
      self.media_item = self.media_item_class(self.main_window.media_dock_manager.media_dock, self)
    File "/usr/share/openlp/openlp/plugins/media/lib/mediaitem.py", line 58, in __init__
      super(MediaMediaItem, self).__init__(parent, plugin)
    File "/usr/share/openlp/openlp/core/lib/mediamanageritem.py", line 82, in __init__
      self.setup_item()
    File "/usr/share/openlp/openlp/plugins/media/lib/mediaitem.py", line 90, in setup_item
      self.media_controller.setup_display(self.display_controller.preview_display, False)
    File "/usr/share/openlp/openlp/core/ui/media/mediacontroller.py", line 322, in setup_display
      player.setup(display)
    File "/usr/share/openlp/openlp/core/ui/media/vlcplayer.py", line 157, in setup
      display.vlc_instance = vlc.Instance(command_line_options)
    File "/usr/share/openlp/openlp/core/ui/media/vendor/vlc.py", line 1411, in __new__
      return libvlc_new(len(args), args)
    File "/usr/share/openlp/openlp/core/ui/media/vendor/vlc.py", line 3630, in libvlc_new
      ctypes.c_void_p, ctypes.c_int, ListPOINTER(ctypes.c_char_p))
    File "/usr/share/openlp/openlp/core/ui/media/vendor/vlc.py", line 246, in _Cfunction
      raise NameError('no function %r' % (name,))
  NameError: no function 'libvlc_new'

  --- System information ---
  Platform: Linux-4.2.0-36-generic-i686-with-Ubuntu-15.10-wily
  Desktop: GNOME

  --- Library Versions ---
  Python: 3.4.3+
  Qt5: 5.4.2
  PyQt5: 5.4.2
  QtWebkit: 538.1
  SQLAlchemy: 1.0.8
  SQLAlchemy Migrate: -
  BeautifulSoup: 4.3.2
  lxml: 3.4.4
  Chardet: 2.3.0
  PyEnchant: 1.6.6
  Mako: 1.0.2
  pyICU: -
  pyUNO bridge: 5.0
  VLC: -

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