[gst-devel] X error on playing video through xvimagesink to QWidget

[Alexey Chernov]

Nicolas, thank you for suggestion. Unfortunately, I didn't manage to solve 
this using thread lock, it seems that it's Qt bug that it doesn't make the 
window native on winId() request. I made a workaround, the first time I play 
the file twice (stop the first turn in 300 msecs and play again).

В сообщении от Вторник 24 ноября 2009 07:34:22 вы написали:
> I think I have almost the same problem but with gtk .
> You have to put a lock , during update of xwindow_id.
> 
> See bug https://bugzilla.gnome.org/show_bug.cgi?id=599885
> 
> Exemple code with GTK
> 
>     def on_sync_message(self, bus, message):
> >         if message.structure is None:
> >             return
> >
> >         if message.structure.get_name() == "prepare-xwindow-id":
> >             # Assign the viewport
> >             gtk.gdk.threads_enter()
> >             gtk.gdk.display_get_default().sync()
> >             imagesink = message.src
> >             imagesink.set_property("force-aspect-ratio", True)
> >             imagesink.set_xwindow_id(self.movie_window.window.xid)
> >             gtk.gdk.threads_leave()
> 
> Nico
> 
> 4ernov a écrit :
> > Hello,
> > I suffer strange problem when using xvimagesink and ximagesink and
> > displaying the output to Qt4's QWidget. I initialize sink element with
> > windowid of QWidget:
> >
> > gst_x_overlay_set_xwindow_id ((GstXOverlay*)xvimagesink,
> > ui->video->winId());
> >
> > and then play video to it using playbin with this sink set as video-sink:
> >
> > g_object_set(G_OBJECT (_pipeline), "video-sink", xvimagesink, NULL);
> >
> > Video files (I tried avi with Xvid encoded video) are played just
> > fine, but when I try to play any DVD disc pipeline works ok, sound
> > goes but nothing is displayed on the widget and console is filled with
> > X Error messages:
> >
> > X Error: BadGC (invalid GC parameter) 13
> >   Extension:    133 (Uknown extension)
> >   Minor opcode: 19 (Unknown request)
> >   Resource id:  0x4c00002
> >
> > I think it prints one such text on every frame, very often.
> > Also, if I set windowid of the main window of application, i.e.:
> >
> > gst_x_overlay_set_xwindow_id ((GstXOverlay*)xvimagesink, this->winId());
> >
> > everything works ok, too.
> >
> > Could you please help me with the problem? How can I fix it or maybe
> > it's a bug in GStreamer or Qt?
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