A system for enabling correlating timeline information between a first media stream and a second media stream, the first media stream and the second media stream being both associated with a common play-out timeline and the first media stream and the second media stream comprising different timeline information comprising different timestamps, and the system comprising: - at least two stream monitors (201, 202), each of said stream monitors being arranged for providing identification information (080, 082) for a media stream by: i) obtaining a persistent identification of one or more media samples of the media stream, the persistent identification being data which is robust against processing of the media stream and can be reproducibly obtained using the media stream, ii) obtaining a timestamp value associated with the persistent identification from timeline information comprised in the media stream, and iii) providing the timestamp value and the persistent identification of the one or more media samples as the identification information; wherein the at least two stream monitors comprise a first stream monitor for providing first identification information for the first media stream and a second stream monitor for providing second identification information for the second media stream; and - a correlation subsystem for combining the first identification information with the second identification information to enable correlating timeline information of the first media stream to timeline information of the second media stream by matching a first persistent identification of the first media stream to a second persistent identification of the second media stream and, by matching the first persistent identification to the second persistent identification, matching a first timestamp value comprised in the first identification information of the first media stream to a second timestamp value comprised in the second identification information of the second media stream, correlating the timeline information between the first media stream and the second media stream, and providing timing information for enabling a synchronization subsystem for performing a synchronization action with respect to the second media stream based on the timeline information of the first media stream. - at least two stream monitors (201, 202), each of said stream monitors being arranged for providing identification information (080, 082) for a media stream by: i) obtaining a persistent identification of one or more media samples of the media stream, the persistent identification being data which is robust against processing of the media stream and can be reproducibly obtained using the media stream, ii) obtaining a timestamp value associated with the persistent identification from timeline information comprised in the media stream, and iii) providing the timestamp value and the persistent identification of the one or more media samples as the identification information; wherein the at least two stream monitors comprise a first stream monitor for providing first identification information for the first media stream and a second stream monitor for providing second identification information for the second media stream; and i) obtaining a persistent identification of one or more media samples of the media stream, the persistent identification being data which is robust against processing of the media stream and can be reproducibly obtained using the media stream, ii) obtaining a timestamp value associated with the persistent identification from timeline information comprised in the media stream, and iii) providing the timestamp value and the persistent identification of the one or more media samples as the identification information; - a correlation subsystem for combining the first identification information with the second identification information to enable correlating timeline information of the first media stream to timeline information of the second media stream by matching a first persistent identification of the first media stream to a second persistent identification of the second media stream and, by matching the first persistent identification to the second persistent identification, matching a first timestamp value comprised in the first identification information of the first media stream to a second timestamp value comprised in the second identification information of the second media stream, correlating the timeline information between the first media stream and the second media stream, and providing timing information for enabling a synchronization subsystem for performing a synchronization action with respect to the second media stream based on the timeline information of the first media stream.