Hi Everyone this is my first post here.
I downloaded the complete source files to build Trisquel Linux(based off
Ubuntu). I found many glade/ui files in the projects and have many
sample applications to study but unfortunately I could not find an
example of embedding video, even with totem.
I also downloaded this pygtk book:
http://svn.majorsilence.com/pygtknotebook/trunk/pygtk-notebook-latest.pdf
On page 89 it describes how to embed video with gstreamer. The samples
worked well for me but I am having trouble moving the concepts from
hand-coded GTK to glade. Are there any examples of this sort of thing
with glade?
This is asking too much but could someone possibly explain how to turn a
glade drawing area into a video widget? I understand that gstreamer is
emitting signals to synchronize the drawing widget but I don't
understand how the video actually gets drawn or is wired in to the
application.
Here is the code from the book that I am struggling with. Thanks for
reading-Patrick :
#!/usr/bin/python
import pygst
pygst.require("0.10")
import gst
import pygtk
import gtk
import sys
class Main(object):
def __init__(self):
self.multimedia_file=""
# Create the GUI
self.win = gtk.Window()
self.win.set_title("Play Video Example")
self.win.connect("delete_event", lambda w,e: gtk.main_quit())
vbox = gtk.VBox(False, 0)
hbox = gtk.HBox(False, 0)
self.load_file = gtk.FileChooserButton("Choose Audio File")
self.play_button = gtk.Button("Play", gtk.STOCK_MEDIA_PLAY)
self.pause_button = gtk.Button("Pause", gtk.STOCK_MEDIA_PAUSE)
self.stop_button = gtk.Button("Stop", gtk.STOCK_MEDIA_STOP)
self.videowidget = gtk.DrawingArea()
self.videowidget.set_size_request(400, 250)
self.load_file.connect("selection-changed", self.on_file_selected)
self.play_button.connect("clicked", self.on_play_clicked)
self.pause_button.connect("clicked", self.on_pause_clicked)
self.stop_button.connect("clicked", self.on_stop_clicked)
hbox.pack_start(self.play_button, False, True, 0)
hbox.pack_start(self.pause_button, False, True, 0)
hbox.pack_start(self.stop_button, False, True, 0)
vbox.pack_start(self.load_file, False, True, 0)
vbox.pack_start(self.videowidget, True, True, 0) # You want to
expand the video widget or else you cannot see it
vbox.pack_start(hbox, False, True, 0)
self.win.add(vbox)
self.win.show_all()
# Setup GStreamer
self.player = gst.element_factory_make("playbin",
"MultimediaPlayer")
bus = self.player.get_bus()
bus.add_signal_watch()
bus.enable_sync_message_emission()
#used to get messages that gstreamer emits
bus.connect("message", self.on_message)
#used for connecting video to your application
bus.connect("sync-message::element", self.on_sync_message)
def on_file_selected(self, widget):
print "Selected: ", self.load_file.get_filename()
self.multimedia_file = self.load_file.get_filename()
def on_play_clicked(self, widget):
print "play"
self.player.set_property('uri', "file://" + self.multimedia_file)
self.player.set_state(gst.STATE_PLAYING)
def on_pause_clicked(self, widget):
print "pause"
self.player.set_state(gst.STATE_PAUSED)
def on_stop_clicked(self, widget):
print "stop"
self.player.set_state(gst.STATE_NULL)
def on_message(self, bus, message):
if message.type == gst.MESSAGE_EOS: # End of Stream
self.player.set_state(gst.STATE_NULL)
elif message.type == gst.MESSAGE_ERROR:
self.player.set_state(gst.STATE_NULL)
(err, debug) = message.parse_error()
print "Error: %s" % err, debug
def on_sync_message(self, bus, message):
if message.structure is None:
return False
if message.structure.get_name() == "prepare-xwindow-id":
if sys.platform == "win32":
win_id = self.videowidget.window.handle
else:
win_id = self.videowidget.window.xid
assert win_id
imagesink = message.src
imagesink.set_property("force-aspect-ratio", True)
imagesink.set_xwindow_id(win_id)
if __name__ == "__main__":
Main()
gtk.main()
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