python/gst-looping-video-1.py

   1 #!/usr/bin/env python
   2 #
   3 # A simple looping player.
   4 # Version 1, based on EOS 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._player = Gst.ElementFactory.make("playbin", "player")
  23         self._player.set_property("uri", uri)
  24
  25         bus = self._player.get_bus()
  26         bus.add_signal_watch()
  27         bus.connect('message::eos', self.on_eos)
  28         bus.connect('message::error', self.on_error)
  29
  30     def run(self):
  31         self._player.set_state(Gst.State.PLAYING)
  32         self.loop = GObject.MainLoop()
  33         self.loop.run()
  34
  35     def quit(self):
  36         self._player.set_state(Gst.State.NULL)
  37         self.loop.quit()
  38
  39     def on_eos(self, bus, msg):
  40         sys.stderr.write(".")
  41         self._player.seek_simple(Gst.Format.TIME, Gst.SeekFlags.FLUSH, 0)
  42
  43     def on_error(self, bus, msg):
  44         (err, debug) = msg.parse_error()
  45         print "Error: %s" % err, debug
  46         self.quit()
  47
  48
  49 def main(args):
  50     def usage():
  51         sys.stdout.write("usage: %s <filename>\n" % args[0])
  52
  53     if len(args) != 2:
  54         usage()
  55         sys.exit(1)
  56
  57     uri = Gst.filename_to_uri(args[1])
  58
  59     player = Player(uri)
  60     player.run()
  61
  62 if __name__ == '__main__':
  63     sys.exit(main(sys.argv))