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gtk4: Clean up Python example
It's not more or less equivalent to the Rust example. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1573>
This commit is contained in:
Sebastian Dröge
parent
71cd80f204
commit
49d3dd17a2
1 changed files with 92 additions and 42 deletions
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@ -1,57 +1,107 @@
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import gi
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import sys
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gi.require_version("Gtk", "4.0")
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gi.require_version('Gst', '1.0')
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gi.require_version('GLib', '2.0')
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from gi.repository import GLib
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gi.require_version('Gtk', '4.0')
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from gi.repository import Gtk
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gi.require_version('Gst', '1.0')
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from gi.repository import Gst
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Gst.init(sys.argv[1:])
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gtksink = Gst.ElementFactory.make("gtk4paintablesink", "sink")
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# Get the paintable from the sink
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paintable = gtksink.props.paintable
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# Use GL if available
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if paintable.props.gl_context:
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print("Using GL")
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source = Gst.ElementFactory.make("gltestsrc", "source")
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glsink = Gst.ElementFactory.make("glsinkbin", "sink")
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glsink.props.sink = gtksink
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sink = glsink
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else:
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source = Gst.ElementFactory.make("videotestsrc", "source")
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sink = gtksink
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pipeline = Gst.Pipeline.new()
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if not pipeline or not source or not sink:
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print("Not all elements could be created.")
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exit(-1)
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pipeline.add(source)
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pipeline.add(sink)
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source.link(sink)
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def on_activate(app):
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win = Gtk.ApplicationWindow(application=app)
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box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
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pipeline = Gst.Pipeline.new()
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overlay = Gst.ElementFactory.make('clockoverlay', None)
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overlay.set_property('font-desc', 'Monospace 42')
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gtksink = Gst.ElementFactory.make('gtk4paintablesink', None)
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paintable = gtksink.get_property('paintable')
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if paintable.props.gl_context:
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print('Using GL')
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src = Gst.ElementFactory.make('gltestsrc', None)
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sink = Gst.ElementFactory.make('glsinkbin', None)
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sink.set_property('sink', gtksink)
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else:
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print('Not using GL')
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src = Gst.ElementFactory.make('videotestsrc', None)
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sink = Gst.Bin.new()
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convert = Gst.ElementFactory.make('videoconvert', None)
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sink.add(convert)
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sink.add(gtksink)
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convert.link(gtksink)
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sink.add_pad(Gst.GhostPad.new('sink', gtksink.get_static_pad('sink')))
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pipeline.add(src)
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pipeline.add(overlay)
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pipeline.add(sink)
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src.link_filtered(overlay, Gst.Caps.from_string('video/x-raw(ANY), width=640, height=480'))
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overlay.link(sink)
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window = Gtk.ApplicationWindow(application=app)
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window.set_default_size(640, 480)
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vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
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picture = Gtk.Picture.new()
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picture.set_size_request(640, 480)
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# Set the paintable on the picture
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picture.set_paintable(paintable)
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box.append(picture)
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btn = Gtk.Button(label="▶/⏸")
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box.append(btn)
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btn.connect('clicked', lambda _: pipeline.set_state(Gst.State.PAUSED) if pipeline.get_state(1)[1]==Gst.State.PLAYING else pipeline.set_state(Gst.State.PLAYING))
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vbox.append(picture)
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win.set_child(box)
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win.present()
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label = Gtk.Label.new('Position: 00:00:00')
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vbox.append(label)
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app = Gtk.Application()
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app.connect('activate', on_activate)
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window.set_child(vbox)
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window.present()
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app.run(None)
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app.add_window(window)
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def on_timeout():
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(res, position) = pipeline.query_position(Gst.Format.TIME)
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if not res or position == -1:
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label.set_text('Position: 00:00:00')
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else:
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seconds = int(position / 1000000000)
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minutes = int(seconds / 60)
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hours = int(minutes / 60)
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seconds = seconds % 60
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minutes = minutes % 60
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label.set_text(f'Position: {hours:02}:{minutes:02}:{seconds:02}')
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return True
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GLib.timeout_add(500, on_timeout)
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pipeline.set_state(Gst.State.PLAYING)
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def on_bus_msg(_, msg):
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match msg.type:
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case Gst.MessageType.EOS:
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app.quit()
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case Gst.MessageType.ERROR:
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(err, _) = msg.parse_error()
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print(f'Error from {msg.src.path_string()}: {err}')
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app.quit()
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return True
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bus = pipeline.get_bus()
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bus.add_watch(GLib.PRIORITY_DEFAULT, on_bus_msg)
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def on_close(_):
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window.close()
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pipeline.set_state(Gst.State.NULL)
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app.connect('shutdown', on_close)
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if __name__ == '__main__':
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Gst.init(None)
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app = Gtk.Application()
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app.connect('activate', on_activate)
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res = app.run(None)
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sys.exit(res)
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