when the chain is called between reset and pad deactive in base change state, a "not negotiation" error is produced. so, we add a judge for flushing and reset Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8916>
when the chain is called between reset and pad deactive in base change state, a "not negotiation" error is produced. so, we add a judge for flushing and reset Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8916>