I’m testing out the feasibility of using my projector’s native 4096x2160 resolution, and am encountering an issue.
Running CE 21.2 nightly on an Odroid N2. Note that this is temporary until my AM6B Plus arrives.
Basically, if I play a 3840x2160 video back at 4096x2160, it stretches the video horizontally to fill the frame despite claiming to be using a 1.00 pixel ratio. No combination of “view mode” settings seems to be able to compensate for this - zoom crops off the sides, and changing the pixel ratio only seems to make the problem worse or the image smaller.
I think it’s doing the same with my re-encoded videos that have black bars removed, but I haven’t verified that as I just spent 90 minutes trying out everything I can think on native UHD videos.
4096x2160 is DCI 4K.
3480x2160 is UHD.
Solution: do not use 4096x2160, it’s a obsolete resolution and not used for 4k media.
Yes, I know what it is. However, higher-end 4K projectors are based on cinema LCOS chips and often work at 4096x2160 in a 17x9 ratio. There are reasons to want to use the full area of the chip:
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Wider possible image when at minimum throw distance. In my situation, using the 17x9 aspect ratio allows for an image 8” wider than 16x9.
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using a 17x9 resolution allows for more light to hit the screen by utilizing more of the chip surface area. For instance, a scope movie would be around 12% brighter when enlarged/cropped to use the 17x9 area versus 16x9 with black bars at the sides. If you don’t think that’s much, realize that companies like JVC charge $3000 more for a step-up model with a 15% brightness improvement.
Anyhow, my main issue is I don’t understand why Kodi/CE completely loses track of pixel aspect ratios and proper 1:1 video display when using this resolution. It’s as if someone assumed anyone selecting this actually had a 16x9 TV and therefore the aspect ratio should be kludged to fit that space?