... and fix bunch of GCC reported warnings Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6435>
Add missing CheckFeatureSupport() call, and remove unused field Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5952>
Adding video encoder element Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5808>