Hi,
the highest "normal" aspect/ration I know is 25/9 (Ben Hur) which means for 4K a height of 1386, for FHD 693 and for HD 462. In this case FHD and Hd were wrong classified when using height.
When I changed something in AR of OpenViX I only allowed the official width of broadcast standards (704, 720, 1280, 1920, 3840) to be send to the TV without scaling in the box in their native resolution. In case of 704/720 the frequency 24/30/25 must also be taken into account.
Otherwise senseless double scaling takes place like 480 -> 576 ->4K which is worse than 480->4K. Here in Germany we also have these funny resolutions like 1440x1080, which is also used on some b-channels, Should not be scaled by box to 1920x1080 and then by the TV to 3840x2160.
Ralf
Edited by Trial, 26 April 2021 - 11:52.