See RFC5576: have CNAME available to the rtpjitterbuffer before the the first RTCP SR is received, for rapid synchronization. Similar to what was done for RTSP (last 2 commits) of [MR 2132]. [RFC5576]: https://www.rfc-editor.org/rfc/rfc5576 [MR 2132]: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2132 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6119>