Galicaster does not run on Wayland

[ppettit]

Galicaster tries to get the xid of the Gtk.DrawingArea to embed video which obviously does not exist in Wayland. The error is 'GdkWaylandWindow' object has no attribute 'get_xid'.

If started with the GDK_BACKEND=x11 I get GstVideoTestSrc:gc-videotest-src: streaming stopped, reason not-negotiated (-4)

This seems like it might be complicated to fix...

[Alfro]

Hi @ppettit, are there any differences between setting XDG_BACKEND=x11 and GDK_BACKEND=x11?

In any case, maybe there is a more generic way to embed a GStreamer video on GTK (without using set_window_handle())?

[ppettit]

@Alfro haha, yes GDK_BACKEND=x11 actually does something and XDG_BACKEND=x11 doesn't 😉 sorry that was just a typo in the issue, I was setting it correctly while testing.

A quick google around doesn't come up with an obvious solution. My understanding is that Wayland is designed to stop you from doing things like this (one process drawing into another processes window) but maybe I am missing something.

[ppettit]

I did a quick proof of concept using gtksink/gtkglsink and that seems to work for both X and Wayland.

It works in a fundamentally different way though

• when using xvimagesink etc (the current method) you make a GtkDrawingArea and pass its xid to the sink element
• when using gtksink the element produces a widget which you pack into a container in the UI

Supporting both methods might be very messy - what do you think about moving to the gtksink/gtkglsink way of doing things completely? It is already pretty messy with all the dancing around between the UI thread and the recorder service. Do you think it is worth me implementing that to see how it works?

[rubenrua]

+1 gtksink/gtkglsink