Thanks for your interest.
My background is application development rather than network engineering, so make no assumptions about what I know, normally a explain to a networks person what functionality I need, and they implement it. Now I must do this for myself.
Several issues concern me.
More than just A/V is being passed through the HDMI 2 network. Quite a lot of kit is from Sony and the devices pass control signals between themselves, transparently, using mostly HDMI, but not exclusively.
- I did some WireSharking and was surprised by how much originated from A/V HDMI devices which also have ethernet connections.
- Smart TVs are very convenient, but they are Android devices, they can handle video decryption, execute apps, control other devices, have wired and wireless Ethernet, Bluetooth, and USB capability and participate in “casting”. Think of them as 4K Android tablets on steroids. But, behaviour-wise, in current street parlance they are THOTs.
I have deliberately not used HEAC, preferring to avoid unexpected complications. Although what I am experiencing has some reminiscent echoes of HEAC.
All the devices are connected to the SRX either through Meraki switches or directly into a ge port on the SRX300.
From time to time I attract attention from people who are generally best avoided.
I suppose I could look at getting application level control working on either the switch or the SRX and getting a handle on what the Android devices are up to.
For anybody else considering using smart TVs as monitors, I’d say test the TV first. Most make lousy 4K monitors, and not all display drivers are up to the job as far as scaling is concerned. It is worth spending some time to get it right as the large dumb monitor option is twice the price for a screen no larger than 32/33”.