UHD MENU'S

[Markus1970]

Hey ive downloaded the trial version of the BDS UHD and ive noticed when coming to designing the menu's that I am limited to 1920x1080 instead of 4k resolution.

I have created movies for the menu's in 3830x2160 but when coming to position buttons the x,y coordinates are related to 1080p, is this the standard for 4K bluray as i thought 4k menus was fine.
I've noticed the IG Editor has uhd support
https://dvd-logic.com/ig_editor/download
Thanks

[Alexey Kolesnikov]

Menu in UHD is in 1080p. Physically BD/UHD has 3 layers:
- background (bottom)
- video
- menu (top)
Layers can have different resolutions. Thus, in 4k video layer has 4k resolution, but menu layer has 2k (in Java and IG/HDMV).

[Markus1970]

So is it best to keep my menus that have video backgrounds in 1080p,
Also can you mix h264 as the menus and h265 for the main movie allthru I understand h265 would be more convenient as in space compression.

[MJS63]

I too was curious why 3840x2160 was giving me a error message in IGEditor, so for maximum menu "sharpness" would this be the best combination
- background (bottom) = 3840x2160 72dpi
- video = 3840x2160 72dpi
- menu (top) = 1920x1080 72dpi. (I persume the top layer is stretched to 3840x2160?)

Do I have to worry about certain thin fonts or colour combinations which may lead to pixcelised edging due to the stretching?

[Alexey Kolesnikov]

Documentation says that player just sets different resolutions for different planes. Theoretically, you should not see any stretch artifacts.

PS: background plane is not used by Blu-Disc Studio / KITe Java.