git.slaskete.net - python-gstreamer-examples/blob - example1.py

   1 #!/usr/bin/env python
   2 # This is a reworked version gstreamer example 1 from Jono Bacon's Python and
   3 # Gstreamer primer:
   4 # http://www.jonobacon.org/2006/08/28/getting-started-with-gstreamer-with-python
   5 #
   6 # It uses Gstreamer 1.0, and replaces alsa with pulse for audio output, and
   7 # drops the use of the GTK main loop, since we're not bothered with a GUI
   8 # Info on porting python scripts to Gstreamer 1.0 can be found here:
   9 # https://wiki.ubuntu.com/Novacut/GStreamer1.0
  10
  11 import gi, time, signal
  12 gi.require_version('Gst', '1.0')
  13 from gi.repository import Gst
  14
  15 class Main:
  16   def __init__(self):
  17     # Initiate the pipeline
  18     Gst.init(None)
  19     self.pipeline = Gst.Pipeline()
  20
  21     # Add an audiotestsrc element to the pipeline
  22     self.audiotestsrc = Gst.ElementFactory.make("audiotestsrc", "audio")
  23     self.pipeline.add(self.audiotestsrc)
  24
  25     # Add a pulsesink element to the pipeline
  26     self.pulsesink = Gst.ElementFactory.make("pulsesink", "sink")
  27     self.pipeline.add(self.pulsesink)
  28
  29     # Link the two elements together
  30     self.audiotestsrc.link(self.pulsesink)
  31
  32     # Set the pipeline to the playing state
  33     self.pipeline.set_state(Gst.State.PLAYING)
  34
  35   # We want a graceful shutdown on CTRL+C
  36   def quit(self, *args):
  37     print("stopping")
  38     exit(0)
  39
  40   # Trap SIGINT
  41   signal.signal(signal.SIGINT, quit)
  42
  43 # Create the pipeline and enter main loop, quit with ctrl+c
  44
  45 Main()
  46 while True:
  47     time.sleep(0.001)