I wanted to post this since I’ve been through so many steps to troubleshoot Chiaki4Deck and have finally come to what seems like a resolution.

I would get green tearing and white flashes despite having an excellent network setup (wired backhaul, 5ghz WiFi on Steam Deck via my WiFi 6 ASUS router) and following all directions—and permutations of these directions like bitrate, codec, etc.—carefully. These issues persisted no matter what I did.

In a last effort to remedy this, I went into the system settings of the PS5, turned off HDMI Link, and voila! Streaming my PS5 works wonderfully now without any artifacts.

Your results might vary, but if nothing else has worked for you, please try it.