I know, the topic has been discussed in several threads, but none I've found so far does help me: After two years of using Plex I still have trouble with a general bad transcoding performance.
My PMS runs on a Windows 2012 R2 with an Intel Xeon E3-1231 v3m, 16 GB RAM and the transcoding folder located on a separate SSD. The media itself is running on a RAID5 with normal harddisks having a usual read througput of over 100 MB/s.
That rig however sometimes is not able to transcode a movie on the fly when played on an AppleTV-plex as the single active client (!).
What am I doing wrong?