http://www.rfc-editor.org/rfc/rfc7164.txt
RFC 7164: RTP and Leap Seconds, K. Gross, R. Brandenburg2014-03-01T23:00:00-00:00This document discusses issues that arise when RTP sessions span Coordinated Universal Time (UTC) leap seconds. It updates RFC 3550 by describing how RTP senders and receivers should behave in the presence of leap seconds.