Even old old debian stable from 2019 ships with a recent-enough libsrtp2 version. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8205>
When attempting to process a buffer after the rtcp session was closed the output buffer memory would remain referenced. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6029>