Server Version#: 1.20.5.3583
Player Version#: Roku Ultra 2020 (4800)
I just replaced my older Roku Ultra with the latest Roku Ultra 4800 and noticed that there is a noticeable stutter in video playback, e.g. a smooth pan of the camera has a teeny bit of stutter every 1-2 seconds lasting for a 1/2 second or so. I’ve noticed this only occurs on videos that have DTS audio, as regular dolby digital videos don’t do this. I’ve reproduced this on several videos and so far have tweaked a bunch of settings, none of which have any effect on the issue. Audio plays back fine. The previous Roku Ultra 2016 (4640) does not do this.
Here’s what’s done so far.
Replaced HDMI cables between Roku to Pioneer receiver and the receiver to the TV.
Set Roku audio from Auto Detect to Auto Passthrough
Set Roku video from auto detect to forced 1080p
Checked Plex Server dashboard to verify that videos are direct playing, e.g. no transcoding.
Roku is hardwired to LAN.
Hi @ChuckPa, thanks for the response. I enabled debug logging and reproduced the issue. I then enabled local Roku logging and ran the video to reproduce the issue a second time.
My Synology has both a self signed cert and a let’s encrypt cert. how can I import this cert into the plex server? The plex player is already setup to use insecure connections on the same lan.
As I stated earlier, the older Roku doesn’t have this issue. I just brought it back out to the living room to test the same video and it didn’t stutter.
PMS will not accept the self-signed certificate.
It appears the Roku isn’t accepting it either.
Given one roku works and one doesn’t,
I think process of elimination is in order.
Remove your self-signed certificate and retest.
that’s the first step.
Also make certain to give PMS your Let’s Encrypt cert (Settings - Network - Show Advanced).
Please be advised that certificate issues are largely a user issue to resolve because PMS has its own certificates and operates full HTTPS without any outside additions.
Hi Chuck, I’ve deleted the self-signed certificate and restarted the PMS app on my Synology. It looks like I’d have to export my LE cert, save it somewhere and point to it in the Plex Network Settings menu you pointed out, which would only work for a bit since the cert expires and is renewed frequently. Is this really a required step? I’m still getting the stutter in the video file that has DTS audio.
edit: I checked the roku-plex-log and it looks like analytics.plex.tv is being blocked by pfBlockerNG on my firewall. Is that the self-signed certificate error you’re referring to?
I have this same issue with the 4800. When playing original quality, DTS gets me stuttering video & AC3, no stutters. If I transcode (which also converts DTS to AC3), the stuttering disappears. When playing the same video via Roku Media Player, from the Plex DLNA server, there is no stuttering. Breezelaters, can you confirm this same behavior?
I’m having the same issue with DTS movies and Plex and the 2020 Ultra, except I don’t get any audio at all with audio passthru enabled in the Roku settings. The files work fine with the LG Plex app.
Hey @cplhunter, forcing transcoding is noticeably smoother, but I wouldn’t say it has eliminated the stuttering. What’s kinda weird is my receiver is registering that DTS audio is being played in transcoding mode.
I normally have the DLNA server off, but I turned it on and played the same Harry Potter DTS audio enabled video file from Roku Media Player and it played buttery smooth. My receiver shows stereo audio though.
Thanks for chiming in. I’m glad I’m not the only one experiencing this issue or that it was an issue unique to my setup.
Same issue on the Roku Ultra 2020 here. Any video playing a DTS audio stream seems to be affected. I have a tested with a video that has both DTS 5.1 and AC3 5.1 audio streams. When I played the AC3 stream the movie plays fine, but as soon as I switched to the DTS stream the video starts stuttering again. I switched back and forth between the streams a handful of times to rule out a fluke. Every time the AC3 audio stream was playing the video quality was flawless, every time the DTS was playing the video would stutter.
I just replaced my 2019 Roku Ultra (model 4670) with a 2020 Ultra (4800), and am seeing the same issue a very slight stuttering/slowdown with the video when a DTS audio track is played, does not occur with AC3 audio. Using Plex Preview channel (6.7.1.6753-5a19341ef-Plex Preview), server on Synology v 1.21.0.3616.
Setting Direct Play to disabled seems to fix it, after a few quick tests.
Can Confirm im having the same stutter issue, and Transcoding or turning off Direct play fixes the issue, this did not happen on my premier+ which i upgraded from…
Temp fix is fine for now but still confusing why the newer (better) hardware has this issue, i guess the plex team just need to do some research…i have faith.
I had the same problems described above with my brand new Roku Ultra 2020. Disabling direct play and forcing it to direct stream worked for me as well.
I would post logs, but I already boxed it up to return it.
An official word from a plex employee would be nice for all of us experiencing these issues, I have a feeling this shouldnt be that hard of a fix and if somebody actually took a look they could give us a fix sooner rather than later.
