Hi guys,
I´m running MacOS Big Sur and Stadia in Chrome, but 4k and HDR still not working.
VP9 in chrome://gpu:
Video Acceleration Information
Decode vp9 profile0 16x16 to 4096x4096 pixels
Decode vp9 profile2 16x16 to 4096x4096 pixels
I have the same problem here. I am using Chrome on iMac with Big Sur and won't let me run 4K as well.
This Chrome-Plugin solved the problem for me! Hope this helps all of you too! Good luck!
https://github.com/johnapost/stadia-resolution