old_contents: #!/usr/bin/python3
  import gi, signal, logging, sys
  
  # import GStreamer and GLib-Helper classes
  gi.require_version('Gst', '1.0')
  from gi.repository import Gtk, Gdk, Gst, GObject, GdkX11, GstVideo
  
  # check min-version
  minGst = (1, 4)
  minPy = (3, 0)
  
  if Gst.version() < minGst:
  	raise Exception("GStreamer version", Gst.version(), 'is too old, at least', minGst, 'is required')
  
  if sys.version_info < minPy:
  	raise Exception("Python version", sys.version_info, 'is too old, at least', minPy, 'is required')
  
  
  # init GObject & Co. before importing local classes
  GObject.threads_init()
  Gdk.init([])
  Gtk.init([])
  Gst.init([])
  
  # import local classes
  from lib.args import Args
  from lib.pipeline import Pipeline
  from lib.controlserver import ControlServer
  
  # main class
  class Voctocore(object):
  	log = logging.getLogger('Voctocore')
  
  	def __init__(self):
  		self.log.debug('creating GObject-MainLoop')
  		self.mainloop = GObject.MainLoop()
  
  		# initialize subsystem
  		self.log.debug('creating A/V-Pipeline')
  		self.pipeline = Pipeline()
  
  		self.log.debug('creating ControlServer')
  		self.controlserver = ControlServer(self.pipeline)
  
  	def run(self):
  		self.log.info('running GObject-MainLoop')
  		self.mainloop.run()
  
  	def quit(self):
  		self.log.info('quitting GObject-MainLoop')
  
  		self.mainloop.quit()
  
  
  # run mainclass
  def main():
  	# configure logging
  	docolor = (Args.color == 'always') or (Args.color == 'auto' and sys.stderr.isatty())
  
  	logging.basicConfig(
  		level=logging.DEBUG if Args.verbose else logging.WARNING,
  		format='\x1b[33m%(levelname)8s\x1b[0m \x1b[32m%(name)s\x1b[0m: %(message)s' if docolor else '%(levelname)8s %(name)s: %(message)s')
  
  	# make killable by ctrl-c
  	logging.debug('setting SIGINT handler')
  	signal.signal(signal.SIGINT, signal.SIG_DFL)
  
  	# init main-class and main-loop
  	logging.debug('initializing Voctocore')
  	voctocore = Voctocore()
  
  	logging.debug('running Voctocore')
  	voctocore.run()
  
  if __name__ == '__main__':
  	main()
  
new_contents: #!/usr/bin/python3
  import gi, signal, logging, sys
  
  # import GStreamer and GLib-Helper classes
  gi.require_version('Gst', '1.0')
  from gi.repository import Gtk, Gdk, Gst, GObject, GdkX11, GstVideo
  
  # check min-version
  minGst = (1, 4)
  minPy = (3, 0)
  
  if Gst.version() < minGst:
  	raise Exception("GStreamer version", Gst.version(), 'is too old, at least', minGst, 'is required')
  
  if sys.version_info < minPy:
  	raise Exception("Python version", sys.version_info, 'is too old, at least', minPy, 'is required')
  
  
  # init GObject & Co. before importing local classes
  GObject.threads_init()
  Gdk.init([])
  Gtk.init([])
  Gst.init([])
  
  # import local classes
  from lib.args import Args
  from lib.pipeline import Pipeline
  from lib.controlserver import ControlServer
  
  # main class
  class Voctocore(object):
  	log = logging.getLogger('Voctocore')
  
  	def __init__(self):
  		self.log.debug('creating GObject-MainLoop')
  		self.mainloop = GObject.MainLoop()
  
  		# initialize subsystem
  		self.log.debug('creating A/V-Pipeline')
  		self.pipeline = Pipeline()
  
  		self.log.debug('creating ControlServer')
  		self.controlserver = ControlServer(self.pipeline)
  
  	def run(self):
  		self.log.info('running GObject-MainLoop')
  		try:
  			self.mainloop.run()
  		except KeyboardInterrupt:
  			self.log.info('Terminated via Ctrl-C')
  
  	def quit(self):
  		self.log.info('quitting GObject-MainLoop')
  		self.mainloop.quit()
  
  
  # run mainclass
  def main():
  	# configure logging
  	docolor = (Args.color == 'always') or (Args.color == 'auto' and sys.stderr.isatty())
  
  	logging.basicConfig(
  		level=logging.DEBUG if Args.verbose else logging.WARNING,
  		format='\x1b[33m%(levelname)8s\x1b[0m \x1b[32m%(name)s\x1b[0m: %(message)s' if docolor else '%(levelname)8s %(name)s: %(message)s')
  
  	# make killable by ctrl-c
  	logging.debug('setting SIGINT handler')
  	signal.signal(signal.SIGINT, signal.SIG_DFL)
  
  	# init main-class and main-loop
  	logging.debug('initializing Voctocore')
  	voctocore = Voctocore()
  
  	logging.debug('running Voctocore')
  	voctocore.run()
  
  if __name__ == '__main__':
  	main()
  
subject: quit nicely on ctrl-c