I have a 4k video that I wanted to play, and while I realise RPi can't play 4k, I know that my TV does. So i plugged in USB drive into TV, and now I'm trying to figure out a way for my raspberry to tell TV to play video from USB input. I tried to use CEC for that but I couldn't find any useful commands, and simulating sequence of remote control button presses seems just too unpractical.
It's important that raspberry pi is capable to launch that command, since I need to be able to synchronise playback with GPIO output.
My TV is Sony Bravia smart TV, which has system based on Android. So is there possibly any way to tell the TV to launch it's media player and straight into the video I'm interested in?