gstreamer/subprojects/gst-plugins-good/tests/examples/qt/qmloverlay/overlay.py

#!/usr/bin/env python
#
# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (C) 2021, The Qt Company Ltd.
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# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
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# a) Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
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# b) Redistributions in binary form must reproduce the above copyright
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#    the documentation and/or other materials provided with the distribution.
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# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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import signal
signal.signal(signal.SIGINT, signal.SIG_DFL)

import sys
import gi
gi.require_version('Gst', '1.0')

from gi.repository import Gst, GLib
from PySide2.QtGui import QGuiApplication
from PySide2.QtQuick import QQuickItem

def main(args):
    app = QGuiApplication(args)
    Gst.init(args)

    pipeline = Gst.parse_launch("""videotestsrc ! glupload ! qmlgloverlay name=o ! gldownload ! videoconvert ! autovideosink""")
    o = pipeline.get_by_name('o')
    f = open('overlay.qml', 'r')
    o.set_property('qml-scene', f.read())

    pipeline.set_state(Gst.State.PLAYING)
    app.exec_()
    pipeline.set_state(Gst.State.NULL)

if __name__ == '__main__':
    sys.exit(main(sys.argv))