gstreamer/subprojects/gst-editing-services/examples/python/simple.py

#!/usr/bin/env python3
#
# GStreamer
#
# Copyright (C) 2013 Thibault Saunier <tsaunier@gnome.org
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
# Boston, MA 02110-1335, USA.

import os
import gi

gi.require_version('Gst', '1.0')
gi.require_version('GES', '1.0')

from gi.repository import Gst, GES, GLib  # noqa


class Simple:
    def __init__(self, uri):
        timeline = GES.Timeline.new_audio_video()
        layer = timeline.append_layer()
        layer.add_clip(GES.UriClip.new(uri))
        self.pipeline = pipeline = GES.Pipeline()
        pipeline.set_timeline(timeline)
        pipeline.set_state(Gst.State.PLAYING)
        bus = pipeline.get_bus()
        bus.add_signal_watch()
        bus.connect("message", self.bus_message_cb)

        self.loop = GLib.MainLoop()

    def bus_message_cb(self, unused_bus, message):
        if message.type == Gst.MessageType.EOS:
            print("eos")
            self.loop.quit()
        elif message.type == Gst.MessageType.ERROR:
            error = message.parse_error()
            print("error %s" % error[1])
            self.loop.quit()

    def start(self):
        self.loop.run()

if __name__ == "__main__":
    if len(os.sys.argv) != 2:
        print("You must specify a file URI")
        exit(-1)

    Gst.init(None)
    GES.init()
    simple = Simple(os.sys.argv[1])
    simple.start()