Plex corrupting movie files.
I'm new to this whole Plex thing. I have been using iTunes and AppleTV, and a friend asked me about Plex so since I was needing a upgraded router anyway, I bought the Nighthawk X10. Getting Plex up and running was a piece of cake. But after a couple days, I believe the Plex scanning process is corrupting some of the movie files. Certain files, some ripped from DVD, others from blu ray, are suddenly corrupted so that the bit rate, resolution and codec are unknown. Plex and iTunes both can't play the file. One particular file, ripped from blu ray, I reripped. and 12 hours later, after one or more Plex scans, it was corrupted again. Also when bringing up the file info in iTunes, the title, director, genre and some other fields are greyed out and cannot be edited. This is not the case with uncorrupted files.
My rippeing process is: MakeMKV for blu ray, Handbrake for DVD and mkv files, using Apple TV surround sound 60 1080p setting. I use Subler to edit the metadata. For foreign language blu rays, (French only, since I speak French) I use Handbrake to add subtitles from srt files for French and English (if they're available.) Otherwise, I just let the bluray use the burned in PSG data. I use original movie poster jpg files when available. Subler is good about finding them, but occasionally I have to search and download an obscure one if Subler can't find it. There is no correlation between corrupted files and where the poster art came from, though.
The hardware config is iTunes running on a Mac mini (2013, I think) with High Sierra. One my passport 4TB drive shared off the nighthawk. I plan to add another my passport on the nighthawk and use a file copy utility to make a backup every night of the current files. iTunes is mapped to the readyshare drive. I am thinking about adding a third 4TB drive just for iTunes to use, and use that as the master, and use a file copy utility to update the main plex drive and backup drive on the router.
I didn't realize Plex had a preferred naming convention, so while my file structure adheres to MOVIES/movie name/movie name.m4v, some of the files have underscores, or don't accurately reflect the movie name, and none have the (date). So instead of A Fish Called Wanda (1988).m4v, it's A_FISH_CALLED_WANDA.m4v. I plan to fix this over the next few days.
Any guidance (short of having to rerip all 400+ movies) would be appreciated. As I said, I'm new at Plex, so are there conventions I'm not following? Are there scanning settings in Plex I should use? Should I let Plex handle the metadata?