Horrible video quality plex media server QNAP

hI, I have a Plex Media Server Version 1.15.4 running on qnap TVS 471 Version 4.3.6.0923 .

Recently the video quality got horrible. While it sometimes improves, especially when there is little movements in the video, it can turn to a level that is just unwatchable.

First i thought was the video file but after some test i realized that the problem is the video conversion, ive already change the transcoding settings to:

-prioritize the quality of coding
-x264 conversion to médium
-and uncheck hardware accelariton

but it didnt help

Attached are a couple of samples, although that is not even the worst:

By the way im streaming by ethernet cable…




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