Roku Ultra 2020, aka 4800x, direct play, colors distorted when playing back HEVC, 1080p content on 1080p screen. Applies to both 8-bit and 10-bit packaging of 8-bit content

[gbballpack]

@granjan7

All of this is really a moot point, we can discuss what we think is the problem till the end of time. Until a Plex developer reads these comments and begins to investigate, it’ll never get fixed. The only Plex person to comment was last Feb.

The “Plex Employee” who is most focused of any Plex Employee on Roku development read and responded to this very thread back in February of 2021.

Roku Ultra 2020, aka 4800x, direct play, colors distorted when playing back HEVC, 1080p content on 1080p screen. Applies to both 8-bit and 10-bit packaging of 8-bit content

This has also been reported on the Roku forums. It seems the Roku Ultra 4800 definitely has some quirks that previous generation didn’t. This issue can be seen outside of the Plex channel too. We will file a report with Roku.

I don’t know ljunkie’s internal role; however, ljunkie is the person who has posted about every Plex for Roku update announcement since July of 2014.

Plex for Roku

The 3.0.3 update has been published to the PlexTest channel. FIXES: - Channel activation status is remembered in case of connectivity loss. - Fix transient state when connecting/disconnecting a Plex account. - Fix a few lingering reboots on grid screen. - Fix a variety of crashes.

The person from Plex who is most focused on the Plex client for Roku has looked into the issue. I can’t say that anyone from Roku has looked at this issue.

Here is the other huge indicator that the issue lies with Roku and not Plex. I only have 1080p televisions which have a maximum of BT.709 color (8-bit). I have the Roku set for 1080p maximum color output. If I feed the Roku BT.709 color (8-bit) HEVC video, it should not be possible for a Roku to output more than BT.709 color, (8-bit) to a screen set for 1080p maximum resolution.

Even if somehow Plex was at fault for this issue, which they are not, the 4800x Roku should not be outputting BT.2020 color (12-bit) to a television set to only play a maximum of BT.709 color, (8-bit) let alone when feed BT.709 color (8-bit) video.

Once again, Roku needs to fix this issue. The problem is 100% in the Roku firmware.