Information such as :- Resolution Frame Rate Video Format Audio Format Colour Depth HDR Color parameter Codec
Is there any hidden settings that can be triggered using sequences on the remote ?
If not, HDMI input, can we get the same for content played on the TV itself using the Android TV platform ?
On my Hisense using the Menu button and going to Picture will show the video format. Going to Help then Signal Information will show the frame rate and color depth.
The resolution, frame rate and audio type appear in a popup on the top left of screen when I change inputs or exit the menu.
If you have adb enabled, you can use "dumpsys surfaceflinger" (in adb shell) for all the details of the video input layer (sometimes called a camera input layer depending on the actual hardware). The HWC (hardware compositor) is the part that handles this.
It isn't user friendly of course, but if you REALLY need to know everything it is here....
I can have some of this informations by pressing the back button when the input is open, but I'm pretty sure it's something from my TV manufacturer instead of something from Android tv itself