Hi everyone. We have become aware of a possible issue related to playback of 4k content on devices that are on version 15 of the Roku OS. This appears to be related to version 15 of the OS and is not related to the Plex app version on your device (we have seen reoprts on both the old and new UI). Yo…

Hi all! First - a HUGE thanks to everyone who jumped in here and provided data and information. This has been a huge help. Second - we have been in touch with Roku regarding this item. The good news is that this does appear to be resolved in the latest update (5531). While I don’t have any specific…

Please post your roku specs like the user above your post.

All the x265 videos I have attempted to play are pixelated, distorted, choppy and/or crash after a few seconds. That includes those in very high bit rate and those with lower bit rate (I haven’t had it happen with x264 videos.) To get my videos to work I had to set the app to play everything at 720p…

I’m experiencing the same issue, everything has to be decoded to 720p for playback not to freeze. I’ve forced encoding and ran direct stream, neither make a difference if it’s above 720, nor does the bitrate itself seem to matter, I’ve got some <2Mbps 1080 that will freeze and some >4Mbps 720 that …

Roku Ultra 4800RW Running Roku 15.0.4 build 5526-C2 Plex app version: 8.6 build 5 Example: Playing rips from the Seinfeld 4K set. Video will play for a couple seconds, then freeze, the audio will continue. Direct play is currently said as Automatic. Transcoding is On Detailed media info: …

Roku ver 15.0.4 Plex 8.6 build 5 Stutters, pixelates and freezes on 4k hdr movies. Audio plays without issue during the video problems.

Was experiencing occasional stuttering and pixelation last night on my Roku Ultra LT. Verified that the unit had updated to Roku OS 15. This was occurring on 1080p H265 content. From some of the comments on the Roku forum, it appears that it’s not specific to 4K content, but possibly just H265 in g…

I’m having playback issues with any 4k H265 content. I don’t have issues I think with h264. I can play 1080 H264 with no problem. My issues started this week. Everything was working fine before. I’m have issues with at least 3 different files all 4k H265. The video shutters, pixelation and audio ju…

I am having the 4K playback issue trying to play 1080p videos. The issues I am experiencing are: solid green screen or green tinted screen Frozen frames Sped up or slow playback Audio stops playing or unsyncs Blocky/Pixelated images Outlines for last frame stuck in video Model: 4850X - Ultra Sof…

I just posted the same problem for 1080p content as well. I’ll need to check if it’s trying to transcode to 4k

Thank you all for these reports! Really appreciate the feedback here. We will be discussing what we (the Plex team) can do to try and help get this addressed this week in a meeting, and these data points really help us in that effort. I have been a bit busy with the Fireside chat last week, but hope…

Roku OS 15 Possible 4k playback Issues Data Collection Request

Plex Players

ewitte September 30, 2025, 9:15pm 23

FYI I just saw this on the Roku forums - “HEVC file playback issues with OS 15.0.4 since this issue affects HEVC file based playback in ANY/ALL apps (RMP, Plex, Jelly, Emby, etc)”

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Roku OS 15 Possible 4k playback Issues Data Collection Request

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