Originally Posted by ToneGrinder
Have you tried hardwiring to the network? I realize it's 10/100, but your needs don't exceed that. I have never had audio/video issues with my Roku4 hardwired, but have on wifi even though on paper this shouldn't be the case. I will say for music I prefer Plex on ATV because there are no audio drop-outs between tracks (known issue with Roku), but for movies it makes no difference.
I haven't tried the Roku hard wired recently, but when I did, it didn't seem to make a difference. I can try it again, but before I do, I wanted to give you my findings after doing some more testing.
When using the Roku units to watch the HD version of the movie Robots which is 40.5 Mbps for the video quality according to the Plex, the stream will rebuffer almost immediately and switch to a lower quality which introduces transcoding, and leads to the DTS audio issue. (this happens with both Roku units even with the Plex channel update that came down last night)
I then tried the movie via Plex on the Apple TV 4, which is the furthest from the router in the bedroom, and played at full quality, and it Played without issues. Because the Apple TV can't do DTS, the audio of course was converted. Still didn't make any issues in this case.
Today, I'm watching the movie via InFuse, which is a direct stream, via an SMB share, and there are no stream issues.
Last night I also wanted to make note that I also tried the stream with the UBP-X800 via DLNA, and that also played without issues. An advantage here was also that I could see the bitrate in action and the stream was only about 29Mbps when I checked so at least part of the time, the stream is lower then what Plex on the Roku reports.
So based on the tests I've done with the same file, all on the same network with the same bandwidth available, this appears to still be a Roku specific issue. The Server is hardwired on a gigabit connection, the switch is also a gigabit switch so devices that support that speed work at that speed. The devices I tested wirelessly are connected at 80211ac, and 80211n. Based on the connection status for wireless clients section on the AirPort Extreme, ROKu has the slowest connection speed out of everything else.
The Roku devices typically have a connection of 173 Mbps
the 80211n devices (Sony players) are usually 300 Mbps
The other 80211ac devices (Apple TV 4) are between 500 and 900 Mbps.
The living room 4K Apple TV is hard wired with Gigabit Ethernet.