voctocore/experiments/failovertest.py



#!/usr/bin/python3
import gi, time

# import GStreamer and GTK-Helper classes
gi.require_version('Gst', '1.0')
from gi.repository import GLib, Gst, GObject

# init GObject before importing local classes
GObject.threads_init()
Gst.init(None)

from videodisplay import VideomixerWithDisplay
from shmsrc import ShmSrc

class Example:
    def __init__(self):
        self.mainloop = GObject.MainLoop()
        self.pipeline = Gst.Pipeline()

        self.bus = self.pipeline.get_bus()
        self.bus.add_signal_watch()
        self.bus.connect('message::eos', self.on_eos)
        self.bus.connect('message::error', self.on_error)

        self.mixdisplay = VideomixerWithDisplay()
        self.grabbersrc = ShmSrc('/tmp/grabber-v', Gst.Caps.from_string('video/x-raw,width=1280,height=720,framerate=25/1,format=RGBx'))

        # Add elements to pipeline
        self.pipeline.add(self.mixdisplay)
        self.pipeline.add(self.grabbersrc)

        self.grabbersrc.link(self.mixdisplay)

    def run(self):
        self.pipeline.set_state(Gst.State.PAUSED)
        time.sleep(0.5)
        self.pipeline.set_state(Gst.State.PLAYING)
        self.mainloop.run()

    def kill(self):
        self.pipeline.set_state(Gst.State.NULL)
        self.mainloop.quit()

    def on_eos(self, bus, msg):
        print('on_eos()')
        #self.kill()

    def on_error(self, bus, msg):
        print('on_error():', msg.parse_error())
        #self.kill()

example = Example()
example.run()