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X error on playing video through xvimagesink to QWidget

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Alexey Chernov

X error on playing video through xvimagesink to QWidget

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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Nicolas Bertrand-4

Re: X error on playing video through xvimagesink to QWidget

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?
> ------------------------------------------------------------------------
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
> trial. Simplify your report design, integration and deployment - and focus on
> what you do best, core application coding. Discover what's new with
> Crystal Reports now. http://p.sf.net/sfu/bobj-july
> ------------------------------------------------------------------------
>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>

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Alexey Chernov

Re: X error on playing video through xvimagesink to QWidget

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?
> > ------------------------------------------------------------------------
> >
> > -------------------------------------------------------------------------
> >----- Let Crystal Reports handle the reporting - Free Crystal Reports 2008
> > 30-Day trial. Simplify your report design, integration and deployment -
> > and focus on what you do best, core application coding. Discover what's
> > new with Crystal Reports now. http://p.sf.net/sfu/bobj-july
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > gstreamer-devel mailing list
> > [hidden email]
> > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>