Thanks...haven't tested 12-bit but 8 and 10 appear identical. Tested on HDR/DV shows and 4K/HD shows on Fire Stick 4K apps, including PS Vue, HBO Now, Netflix, etc.
Originally Posted by CFC
The Fire Stick 4K will output at 2160p for all programs because it detects that it's connected to a 4K capable device.
Adaptive changes appropriately to SDR, HDR 10 or Dolby Vision based on the content. Otherwise, it will output everything to Dolby Vision.
I think that's the expected behavior, and that's how it works with my setup as well (P75-F1).
Thanks...yes, Adaptive just has to do with HDR/DV, etc. I guess the Fire Stick 4K is doing the upscaling, which is why the Vizio detects it as 4K, not 1080p.
By the way, this Fire Stick 4K is buggy as all hell, especially with audio loss. Three days in a row now, I've had to reboot it because the audio won't play at the start of launching it. One time, all video was playing at 3-4 times speed as well as no audio. I was definitely not fast forwarding...this was at the start of playing eps. Just started a show on Amazon and again, no audio. I went out of the show and back in, and the audio was working again. Thank goodness, I haven't experienced audio dropouts during a show yet...just at the start of playing an episode.
UPDATE: when I pause a show for more than a couple of minutes and go back in tonight, there's no audio playing via the Fire Stick. This was switching between two different shows on Amazon Prime. I noticed when I pressed Info on the Vizio, whenever there's no audio, there is no Dolby Audio logo, where there usually is for these shows. I went into the Fire TV Audio Settings and changed it to "Always Dolby Digital" and so far, it seems to be helping. We'll see though...
Also tonight, when I got back home, the Fire Stick clock was off by 9 hours and 5 minutes. A reboot got it back in sync. This affected my PS Vue program guide grid also.
Might soon be time for a factory reset. I've had the Fire Stick for 2 weeks.