From bfdbb547d7df9304dcfc50cc9b13013c92194da2 Mon Sep 17 00:00:00 2001
From: Matthew Clark <matthew1000@gmail.com>
Date: Fri, 8 Jun 2018 21:34:49 +0100
Subject: [PATCH] More Python examples - this time gstproxy

---
 python_examples/gstproxy_01_audiotestsrc.py | 32 +++++++++++++
 python_examples/gstproxy_02_playbin.py      | 50 +++++++++++++++++++++
 python_examples/show_test_stream.py         |  8 ++--
 3 files changed, 86 insertions(+), 4 deletions(-)
 create mode 100644 python_examples/gstproxy_01_audiotestsrc.py
 create mode 100755 python_examples/gstproxy_02_playbin.py

diff --git a/python_examples/gstproxy_01_audiotestsrc.py b/python_examples/gstproxy_01_audiotestsrc.py
new file mode 100644
index 0000000..326bd0a
--- /dev/null
+++ b/python_examples/gstproxy_01_audiotestsrc.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+# Shows how two pipelines can be connected, using proxysink/proxysrc.
+# It will output a test audio sound.
+# Python equivalent of example at https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-bad-plugins/html/gst-plugins-bad-plugins-proxysrc.html
+import gi
+gi.require_version('Gst', '1.0')
+from gi.repository import GObject, Gst
+import os
+
+Gst.init(None)
+mainloop = GObject.MainLoop()
+
+pipe1 = Gst.parse_launch("audiotestsrc is-live=1 ! proxysink name=psink")
+psink = pipe1.get_by_name('psink')
+
+pipe2 = Gst.parse_launch("proxysrc name=psrc ! autoaudiosink")
+psrc = pipe2.get_by_name('psrc')
+
+psrc.set_property('proxysink', psink)
+
+clock = Gst.SystemClock.obtain()
+pipe1.use_clock(clock)
+pipe2.use_clock(clock)
+clock.unref()
+
+pipe1.set_base_time(0)
+pipe2.set_base_time(0)
+
+pipe1.set_state(Gst.State.PLAYING)
+pipe2.set_state(Gst.State.PLAYING)
+
+mainloop.run()
diff --git a/python_examples/gstproxy_02_playbin.py b/python_examples/gstproxy_02_playbin.py
new file mode 100755
index 0000000..c8571d4
--- /dev/null
+++ b/python_examples/gstproxy_02_playbin.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+# Shows how two pipelines can be connected, using proxysink/proxysrc
+# This example uses Playbin to read a file, and send the video and audio to separate proxies.
+# Unlike just using playbin directly, this will never end, as the other pipelines will continue 'listening'.
+import gi
+gi.require_version('Gst', '1.0')
+from gi.repository import GObject, Gst
+import os
+
+Gst.init(None)
+mainloop = GObject.MainLoop()
+
+pipe1 = Gst.parse_launch("playbin uri=\"file://" + os.environ['SRC'] + "\"")
+playsink = pipe1.get_by_name('playsink')
+
+psink1 = Gst.ElementFactory.make("proxysink", "psink1")
+psink2 = Gst.ElementFactory.make("proxysink", "psink2")
+playsink.set_property('video-sink', psink1)
+playsink.set_property('audio-sink', psink2)
+
+pipe2 = Gst.parse_launch("proxysrc name=psrc1 ! autovideosink")
+psrc1 = pipe2.get_by_name('psrc1')
+psrc1.set_property('proxysink', psink1)
+
+pipe3 = Gst.parse_launch("proxysrc name=psrc2 ! autoaudiosink")
+psrc2 = pipe3.get_by_name('psrc2')
+psrc2.set_property('proxysink', psink2)
+
+clock = Gst.SystemClock.obtain()
+pipe1.use_clock(clock)
+pipe2.use_clock(clock)
+pipe3.use_clock(clock)
+clock.unref()
+
+pipe1.set_base_time(0)
+pipe2.set_base_time(0)
+pipe3.set_base_time(0)
+
+pipe1.set_state(Gst.State.PLAYING)
+pipe2.set_state(Gst.State.PLAYING)
+pipe3.set_state(Gst.State.PLAYING)
+
+def on_error(bus, message):
+    print(message.parse_error())
+
+bus1 = pipe1.get_bus()
+bus1.add_signal_watch()
+bus1.connect('message::error', on_error)
+
+mainloop.run()
diff --git a/python_examples/show_test_stream.py b/python_examples/show_test_stream.py
index 07b79c6..84f2bd3 100644
--- a/python_examples/show_test_stream.py
+++ b/python_examples/show_test_stream.py
@@ -11,14 +11,14 @@ gi.require_version('Gst', '1.0')
 from gi.repository import GObject, Gst
 import os
 
-Gst.init()
+Gst.init(None)
 mainloop = GObject.MainLoop()
 
 pipeline =  Gst.Pipeline.new("pipe")
 
-videotestsrc = Gst.ElementFactory.make("videotestsrc", "videotestsrc")
-videoconvert = Gst.ElementFactory.make("videoconvert", "videoconvert")
-autovideosink = Gst.ElementFactory.make("autovideosink", "autovideosink")
+videotestsrc = Gst.ElementFactory.make("videotestsrc")
+videoconvert = Gst.ElementFactory.make("videoconvert")
+autovideosink = Gst.ElementFactory.make("autovideosink")
 
 pipeline.add(videotestsrc)
 pipeline.add(videoconvert)