Adding video encoder element Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5808>
Implement converter object with convert element Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5870>
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5870>