I'm trying to play my 4k hdr movies thru my hardrive that's plugged into the USB port, it will play 4k resolution but the hdr10 is greyed out. Is that usb port not able to stream hdr? null

Question

HighPhi · Accepted Answer

your Videos need to be encoded very specifically to view HDR through the USB.
The Vizio Web site has that Info in there FAQ section

Gabe · Answer

It might be difficult to play HDR 4K movies through USB as it might be too slow to transfer all the data. Especially because the TV only has USB 2.0.

VIZIO · Answer

This may be dependent on the format of the file and what other files are on the drive.  Please contact our customer support at 877-878-4946 for assistance with your television.

“I'm trying to play my 4k hdr movies thru my hardrive that's plugged into the USB port, it will play 4k resolution but the hdr10 is greyed out. Is that usb port not able to stream hdr?”

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