python/gst-looping-video-2.py

   1 #!/usr/bin/env python
   2 #
   3 # A simple looping player.
   4 # Version 2, based on "about-to-finish" handling.
   5 #
   6 # Get a test sample with:
   7 # youtube-dl -t http://www.youtube.com/watch?v=yWa-YXiSk2Y
   8
   9 import sys
  10
  11 import gi
  12 gi.require_version('Gst', '1.0')
  13 from gi.repository import Gst
  14 Gst.init(None)
  15
  16 from gi.repository import GObject
  17 GObject.threads_init()
  18
  19
  20 class Player:
  21     def __init__(self, uri):
  22         self._uri = uri
  23         self._player = Gst.ElementFactory.make("playbin", "player")
  24         self._player.set_property("uri", uri)
  25         self._player.connect("about-to-finish", self.on_about_to_finish)
  26
  27         bus = self._player.get_bus()
  28         bus.add_signal_watch()
  29         bus.connect('message::error', self.on_error)
  30
  31     def run(self):
  32         self._player.set_state(Gst.State.PLAYING)
  33         self.loop = GObject.MainLoop()
  34         self.loop.run()
  35
  36     def quit(self):
  37         self._player.set_state(Gst.State.NULL)
  38         self.loop.quit()
  39
  40     def on_about_to_finish(self, player):
  41         sys.stderr.write(".")
  42         player.set_property("uri", self._uri)
  43
  44     def on_error(self, bus, msg):
  45         (err, debug) = msg.parse_error()
  46         print "Error: %s" % err, debug
  47         self.quit()
  48
  49
  50 def main(args):
  51     def usage():
  52         sys.stdout.write("usage: %s <filename>\n" % args[0])
  53
  54     if len(args) != 2:
  55         usage()
  56         sys.exit(1)
  57
  58     uri = Gst.filename_to_uri(args[1])
  59
  60     player = Player(uri)
  61     player.run()
  62
  63 if __name__ == '__main__':
  64     sys.exit(main(sys.argv))