Expose User Data Unregistered as a new Meta and add API to parse Precision Time Stamp (ST 0604). Fixes #927 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1458>
AUD nalu in packetized format is completely valid and therefore we should not assume that we should insert AUD for packetized -> bytestream conversion. Fixes: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/862 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1296>