GstVideoOverlay, Gtk3 and Wayland

[Emmanuel Pacaud-3]

Hi,

I'm developing a video viewer application for the aravis project
(https://github.com/AravisProject/aravis) which uses a GstVideoOverlay
element.

When this application runs in a X11 session, everything works fine,
like on the attached screenshot. But in a wayland session, the video is
displayed in a separate window, instead of being embedded in the main
application window.

My code is based on what is in the GstOverlayElement documentation, in
the GstVideOverlay and Gtk+ paragraph, which obviously doesn't handle
the wayland case. How are we supposed to proceed in this case ?

Cheers,

        Emmanuel.

_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

[Jan Alexander Steffens]

On Fri, Aug 12, 2016 at 4:24 PM Emmanuel Pacaud <[hidden email]> wrote:

When this application runs in a X11 session, everything works fine,
like on the attached screenshot. But in a wayland session, the video is
displayed in a separate window, instead of being embedded in the main
application window.

My code is based on what is in the GstOverlayElement documentation, in
the GstVideOverlay and Gtk+ paragraph, which obviously doesn't handle
the wayland case. How are we supposed to proceed in this case ?

You're using GDK_WINDOW_XID to get the X window ID to pass to GstVideoOverlay. On Wayland, this won't work and should have caused CRITICAL warnings to stderr, since you have a GdkWaylandWindow and not a GdkX11Window.

waylandsink expects to get a pointer to a struct wl_surface instead of an X window ID. You can obtain this pointer using gdk_wayland_window_get_wl_surface.

You can test which kind of window you have using GDK_IS_X11_WINDOW and GDK_IS_WAYLAND_WINDOW.

_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

[Olivier Crête-3]

Hi,

On Fri, 2016-08-12 at 15:02 +0000, Jan Alexander Steffens wrote:

On Fri, Aug 12, 2016 at 4:24 PM Emmanuel Pacaud <[hidden email]> wrote:

When this application runs in a X11 session, everything works fine,
like on the attached screenshot. But in a wayland session, the video is
displayed in a separate window, instead of being embedded in the main
application window.

My code is based on what is in the GstOverlayElement documentation, in
the GstVideOverlay and Gtk+ paragraph, which obviously doesn't handle
the wayland case. How are we supposed to proceed in this case ?

The other portable way is to use gtkglsink which has a property that gives you a widget. Or you can use gtksink if you want non-accelerated rendering (which will be a lot more CPU intensive). This should work on both X and Wayland clients.

-- 
Olivier Crête
[hidden email]

_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

[Emmanuel Pacaud-3]

Hi,

Le sam. 20 août 2016 à 0:51, Olivier Crête
<[hidden email]> a écrit :

> On Fri, 2016-08-12 at 15:02 +0000, Jan Alexander Steffens wrote:
>> On Fri, Aug 12, 2016 at 4:24 PM Emmanuel Pacaud
>> <[hidden email]> wrote:
>>> When this application runs in a X11 session, everything works fine,
>>> like on the attached screenshot. But in a wayland session, the
>>> video is
>>> displayed in a separate window, instead of being embedded in the
>>> main
>>> application window.
>>>
>>> My code is based on what is in the GstOverlayElement documentation,
>>> in
>>> the GstVideOverlay and Gtk+ paragraph, which obviously doesn't
>>> handle
>>> the wayland case. How are we supposed to proceed in this case ?
>
> The other portable way is to use gtkglsink which has a property that
> gives you a widget. Or you can use gtksink if you want
> non-accelerated rendering (which will be a lot more CPU intensive).
> This should work on both X and Wayland clients.

Thanks Olivier. I have ported my viewer to use gtk(gl)sink and it works
perfectly now. I had a position issue when the gtksink widget was added
to a GtkStack with interpolate-size property set to TRUE. Setting it to
FALSE solved my issue. More details here:

https://bugzilla.gnome.org/show_bug.cgi?id=771427

Cheers,

        Emmanuel.

_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel