Hi!
I can’t find a way to sync my subtext to the movie. Sometimes I need to move it forward, (or back) end sometimes adjusting the speed to match the movie. Like in VLC.
If there is such a function, please help a PLEX-newbie!
If not, please-PLEX-please, put it in there in the next version!
I asked this question in September 2015. And still no response from PLEX!
Please, at least answer if this is a function that’s in the pipeline or not… Give me SOME indication that you actually are reading this forum.
I love your product, I’m paying for the service, so it’s only this “little” detail that disturbs me.
Thank you in advance! 
Since you posted this in Sep 2015 and it has received zero likes to this point (That is how voting in this forum happens) it must not be of interest to many.
Personally I would not be interested in it at all. The few times I have thought it might be handy I just found another subtitle file that matched up better.
Early 2021 clean-up: implemented (subtitle offsets can be changed for external SRT subtitles)
https://support.plex.tv/articles/subtitle-offsets/
