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 unit in the header
Apple QuickTime file format documentation defines time scale as the number of time coordinate units per second. It separately describes movie duration in those units. A header value of 600 is therefore not a claim that the video contains 600 distinct pictures each second. Keep movie time scale, media time scale, sample duration and reported frame rate separate when reading a diagnostic dump; their field names carry essential meaning.
Calculate a source duration
For an original arithmetic example, a movie duration of 18,000 units on a 600 units per second timeline represents 30 seconds. That calculation does not tell you the number of video frames. In a separate constant timing example, media units of 1,000 per second with frames lasting 40 units imply 25 frames per second. These hypothetical values demonstrate two related ratios and are not an inventory of a tested MOV file.
Do not rewrite a scale to match a desired label
Apple explains that movie and media time scales are independent and that frame timing needs the appropriate scale. Changing one number without correctly updating associated timing data can change interpretation rather than improve playback compatibility. Preserve the original and use a documented media tool for any required conversion. This article is a reading guide, not a file patch recipe, and does not establish UK IPTV frame rates, native capture resolution or successful conversion of every container.