Stricter and simpler. For example, now we properly error out when gstreamer-gl-1.0 was not found when the qt5 plugin is enabled or when a C++ compiler is not enabled. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/587>
The example shows how to add qmlglsink to an already running pipeline with pre-existing OpenGL elements.