I have a Raspberry Pi 4. The thing is, I want to play 2 videos at the same time, since the RPi-4 has 2 HDMI outputs. BUT I also want to have split audio. The audio from video 1 should go out over the first HDMI (labeled as HDMI0), the audio of the second video should go out through the second HDMI (labeled HDMI1).
Imagine the following: I turn on screen 1. I see the first video with its sound. Then, I turn screen 1 off and turn screen 2 on. I hear and see the video 2, while the other one is being played silently on the turned off monitor. Both videos need to be in 4K resolution.
Is this possible? I could not find any resources regarding this specific set up. Please note, that it is important to achieve this with this exact set up. Everything should run independently, as if it were controlled by 2 RPi's.
Thanks for your time and knowledge.