I'm moving this from the Roku thread.
For some movies there are some playback issues as Roku is buffering a lot.
Even if I manually set to 2-3 Mbps or 60 Mbps FullHD the result is the same.
The wireless is working with ~400Mbps and I'm playing via LAN. With other devices for the same file (Apple TV, nVidia Shield, iOS, Android Mobile) everything works fine on every quality.
I don't think this is a Roku issue as with the latest beta or the stable release I'm encountering the same issue. Tested on two Roku devices from two different locations and the outcome is the same.
There are several videos with this issue on Roku but I've managed to capture this one and reproduce the fault every time.
Emby Server 126.96.36.199
Roku Streaming Stick+ latest OS version
First log with hw transcoding, second one without.