Cannot Overlay over Gstreamer Video with Gtk.Overlay
问题 I have a project with Python, PyGObject (Gtk 3), and GStreamer (0.11) I have video in my application, so I'm using a Gtk.Overlay widget so I can put other visual elements over the video background. (I need this, trust me.) (Due to the number of widgets, and the need for specific positioning and overlaying of these widgets, I'm using a Gtk.Fixed container.) However, in using the Gtk.Overlay object with anything added via "overlay.add_overlay(widget)", the video is no longer visible at all. I