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Sony Bravia 9 - Local Dimming Bug when viewing HDR / Dolby Vision #1010

Open JonathanYL opened 4 hours ago

JonathanYL commented 4 hours ago

Description

When playing 4K HDR or Dolby Vision content, the local dimming is not applied on Sony's flagship 2024 mini-led TV the Bravia 9's on board Stremio Android TV app. This results in elevated black bars and a slightly washed out picture.

Steps to reproduce the behavior:

  1. Open Stremio and select a 4K HDR / Dolby Vision movie - examples used were Dune, Strange Darling, The Batman
  2. Notice that the blacks and black bars are elevated / blotchy - meaning local dimming is not enabled
  3. Now select the same 4K SDR movie
  4. Notice that the blacks and black bars are pitch black - meaning local dimming is enabled

Expected behavior

Black bars and black screens should be black and not elevated.

Screenshots

TV

Additional context Other users on avsforums reported the same issue with the latest firmware. One user reported a similar issue with Plex where the Plex developer fixed the issue by removing a layer in their app. Here is the link and quote:

This is not a Bravia 9 issue, this is an internal app issue. Thats the same problem Plex had before. The Plex Dev told me he did the following to fix it:

"Thats amazing news, so we removed a layer that’s supposed to stop ghosting effects on Sony TVs, which may bring some other issues. (But it might only be for old Sony TVs hopefully) "

I think you need to contact the Stremio and HBO Max support and tell them to remove the same layer on their internal apps to get Local Dimming working.

This most likely affects the Bravia 7 as well since both the Bravia 7 and Bravia 9 are mini-led tvs. I don't believe you will see this issue on OLED tvs since they don't have local dimming.