【发布时间】：2016-11-12 13:15:22
【问题描述】：
我想在对话框中显示视频。
因此，我创建了一个 Gst.DrawingArea 和一个 Gst.Pipeline，其中包含一个 Gst.Element“playbin”。
我创建了一个小例子，它会打开一个带有按钮的窗口。 如果单击该按钮，则会打开对话框并播放视频。 但我只听到视频的音频。
在另一个只有一个窗口和一个 DrawingArea 的示例中，它可以正常工作。
甚至可以在 Gtk.Dialog 中显示视频吗？
我正在使用 Python 3.5.2。
编辑：
#!/usr/bin/python3
from os import path
import gi
gi.require_version('Gst', '1.0')
gi.require_version('Gtk', '3.0')
gi.require_version('GdkX11', '3.0')
gi.require_version('GstVideo', '1.0')
from gi.repository import Gst, Gtk, GLib, GdkX11, GstVideo
from gi.repository import GObject
GObject.threads_init()
Gst.init(None)
filename = "/path/to/movie.avi"
uri = 'file://' + filename
class DialogExample(Gtk.Dialog):
def __init__(self, parent):
Gtk.Dialog.__init__(self, "My Dialog", parent, 0,
(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
Gtk.STOCK_OK, Gtk.ResponseType.OK))
self.drawingarea = Gtk.DrawingArea.new()
self.drawingarea.connect('draw', self.on_draw)
#self.drawingarea.connect('realize', self.on_realize)
self.drawingarea.connect('unrealize', self.on_unrealize)
self.drawingarea.set_size_request(800, 600)
self.set_default_size(1000, 800)
self.btn_Play = Gtk.Button.new_with_label("Play")
self.btn_Play.connect('clicked', self.on_click)
box = self.get_content_area()
box.add(self.drawingarea)
box.add(self.btn_Play)
# Create GStreamer pipeline
self.pipeline = Gst.Pipeline()
# Create bus to get events from GStreamer 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)
# This is needed to make the video output in our DrawingArea:
self.bus.enable_sync_message_emission()
self.bus.connect('sync-message::element', self.on_sync_message)
# Create GStreamer elements
self.playbin = Gst.ElementFactory.make('playbin', None)
# Add playbin to the pipeline
self.pipeline.add(self.playbin)
# Set properties
self.playbin.set_property('uri', uri)
self.show_all()
def on_click(self, button):
if self.playbin.get_state(0).state == Gst.State.PAUSED:
self.pipeline.set_state(Gst.State.PLAYING)
button.set_label("Stop")
else:
self.pipeline.set_state(Gst.State.PAUSED)
button.set_label("Play")
def on_realize(self, widget, data=None):
print("on_relaize")
window = widget.get_window()
self.xid = window.get_xid()
self.playbin.set_window_handle(self.xid)
def on_draw(self, widget, cr):
print("ondraw", self.playbin.get_state(0).state)
if self.playbin.get_state(0).state < Gst.State.PAUSED:
allocation = widget.get_allocation()
cr.set_source_rgb(0, 0, 0)
cr.rectangle(0, 0, allocation.width, allocation.height)
cr.fill()
self.on_realize(widget)
def on_unrealize(self, widget, data=None):
# to prevent racing conditions when closing the window while playing
self.playbin.set_state(Gst.State.NULL)
self.pipeline.set_state(Gst.State.NULL)
def on_sync_message(self, bus, msg):
if msg.get_structure().get_name() == 'prepare-window-handle':
print('prepare-window-handle')
print('on_sync', self.xid)
print(msg)
print(msg.src)
def on_eos(self, bus, msg):
print('on_eos(): seeking to start of video')
self.pipeline.seek_simple(
Gst.Format.TIME,
Gst.SeekFlags.FLUSH | Gst.SeekFlags.KEY_UNIT,
0
)
def on_error(self, bus, msg):
print('on_error():', msg.parse_error())
class DialogWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="Dialog Example")
self.set_border_width(6)
button = Gtk.Button("Open dialog")
button.connect("clicked", self.on_button_clicked)
self.add(button)
def on_button_clicked(self, widget):
dialog = DialogExample(self)
response = dialog.run()
if response == Gtk.ResponseType.OK:
print("The OK button was clicked")
elif response == Gtk.ResponseType.CANCEL:
print("The Cancel button was clicked")
dialog.destroy()
win = DialogWindow()
win.connect("delete-event", Gtk.main_quit)
win.show_all()
Gtk.main()
【问题讨论】：
标签： python python-3.5 gtk3 gstreamer-1.0