Server Version#: Synology DS218: 1.13.6.283-9e747cb50
Player Version#: Plex for LG: 3.72.0/iOS (iPhone X): 5.5
Hi,
I’m not being able to play 4K video files because Plex is always transcoding it.
But I’m 100% sure that I’ve already played those same 4K video files before, with this PMS version.
I’m using Plex 1.13.6.283-9e747cb50 on Synology DS218 and trying to reproduce 4K videos files recorded on iPhone X or GoPro.
the classic obstacle with 4K videos is the client’s support for that exact combination of container (e.g. mkv, mp4, mov…) and audio/video/subtitle stream codecs (e.g. h264 or h265 video / AC3, DTS, aac audio / SRT, VOBSUP, PGS subtitles).
If there’s been no change to the video – did you e.g. update the player since then?
Try to disable the subs. You should find the reason of the transcoding. In my situation was the PGS subtitles. I put external file and I solve the problem.