Abstract: A method and system for inter-destination synchronization of at least a first and a second stream is described, wherein the second stream is the output stream of a media stream modification unit using the first stream as an input stream. The method comprises the steps of: providing first arrival time information of a packet in the first stream arriving at a first synchronization point and second arrival time information of a packet in the second stream arriving at a second synchronization point; providing synchronization correlation information on the synchronicity relationship between said input stream and said output stream; and, calculating delay information on the basis of the first and second arrival time information and the synchronization correlation information.