Media diagnostics · Primary-source explanation; examples are illustrative. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Identify the timeline reference
The Media3 live streaming guide distinguishes the current live window, a position relative to its start and an offset from real time. It notes that default controls can appear to jump backwards when the live window updates. That numerical change is not by itself a rewind in the programme. A developer should identify which reference the control displays before diagnosing a user report that the timestamp moved backwards.
Follow a shifting window example
An original illustrative example starts with a window beginning at programme reference 100 seconds and playback at 140 seconds, giving a relative position of 40 seconds. Later the window begins at 120 seconds while playback has advanced to 145 seconds. Its relative position is now 25 seconds. The displayed relative number decreased although the programme reference advanced by five seconds. These invented values explain the reference shift rather than a measured service timeline.
Keep retained media and live offset distinct
The current window describes what the adaptive source makes available, while live offset describes distance from real time. A long pause can also put playback behind a moving window, which needs its own documented handling. Do not label every shifted control value as packet loss or assume the whole event remains recorded. This article applies to the Media3 adaptive live model and does not promise a particular UK IPTV rewind window or implementation.