Hi Dtech,
Cool you never seen one Always a first
Yes, there existed such a thing as analog 16:9 over here. For quite some time. It was called PAL plus.
It was used untill the end of the analog broadcast shutdown. Imagine a regular 4:3 / 576 lines picture, with a letterbox 16:9 broadcast inside it. That's what you would see on a regular 4:3 TV.
However inside the "black bars" above and below the rest of the TV lines were "hidden".(if you really cranked up the brightness you could see them)
A widescreen tv would decode those hidden lines & then give you the full resolution picture. (w/o the black bars of course).
Now in modern times, the every set top box, dvd player does this as follows: output an anamorphic 4:3 picture. (everything is stretched when in 4:3) The TV is then set to "Wide" and it will compress the 4:3 picture to a 16:9 aspect ratio. Same result, but much easier.
I have attached what's inside my display_cap file.
I did not find any other settings. Maybe there are?
I am not sure if this is a kodi setting or a libreelec setting. With the (original) Android tv, you could set the aspect ratio (4:3 / 16:9) With 16:9 it did a proper anamorpic ratio. That setting was however not in Kodi, but somewher in the Android settings.
For the video's a found a partial solution: inside a clip setting (wheel bottom right I could enable 'stretch to 16:9) No if only I could find this for the GUI...
That still wrong.
Added some screenshots to show the problem.
With the various modes you can set the TV set "in to" illustrate what happens when the ratio's are wrong...
The TV mode is displayed in green color (centered).
Greetings!