How do you that in wayland? I'm very interested with crazy and useless stuff like this. On X11, you can pass a window ID to mpv with --wid, it'll attach the player to that window, even if that window is actually a button in a spreadsheet app.
You implement the wayland server interface, launch mpv with the right environment to connect to you, then you take the buffer mpv gives you and compose it onto your window.
You can definitely do that as wayland supports sub-compositors. You probably shouldn't, though.
How do you that in wayland? I'm very interested with crazy and useless stuff like this. On X11, you can pass a window ID to mpv with
--wid, it'll attach the player to that window, even if that window is actually a button in a spreadsheet app.You implement the wayland server interface, launch mpv with the right environment to connect to you, then you take the buffer mpv gives you and compose it onto your window.