ayaya

There are at least 20 different options to choose from, surely one of them has what you want. And that number is only going to rise. Saying it never will is extremely short-sighted.

When was the last time you tried it? Up until recently I have had issues but I've been using it for the last few days and it feels good now. All of the problems I had with it the last few times I've tried it (drag and drop not working, copy-paste being weird, fractional scaling) have seemingly been fixed.

I was just about to comment about the 3rd video thing. It's always in that same spot. Although for me sometimes it isn't even related to the current video it's (seemingly) random.

That's how I've felt for a long time. What a stupid world we've built where reducing the number of jobs is considered a bad thing.

It's a drop-in replacement for the nvidia package. AFAIK there are zero differences in functionality. The only change is it being built locally by DKMS instead of coming pre-built.

I recommend switching to nvidia-dkms which will auto rebuild the module for every kernel and lets you update them independently of each other.

So yeah, first question is whether or not there is a way to migrate all of that data.

JellyPlex-Watched is exactly what you are looking for.

I don't think there is a way to migrate the posters but I could be wrong.

Is there a way/tool to do this on jellyfin?

For audio and subtitles there is a setting for Jellyfin to remember which ones you want for a specific series so you select it for one episode and it will keep using it for subsequent episodes. No external tool required. I'm not sure if they are enabled by default but you can find "Set audio track based on previous item" and "Set subtitle track based on previous item" under the Playback settings.

The audio track language/title is often either unamed or named inconsistently, so it often never works. And for subtitles, you have the same issue, except you have to also include the fact that there can, and usually is, two or more English subtitles for dialogue, signs(on-screen text), commentary, etc.

Part of your problem here is also just bad sourcing. If the releases you're downloading are incorrectly labeling their tracks those releases are probably not worth grabbing. I would avoid whichever ones those are. When they're done correctly both Plex and Jellyfin (and almost any other player) will correctly select Japanese+Full Subtitles or English+Signs/Songs automatically.

So basically, what are my options for direct-play with jellyfin, if any?

Jellyfin Media Player on desktop, Findroid on Android, Swiftfin on iOS.

It’s 2023. Every device I own is more than capable of playing every format, codec, etc that I could possibly need.

That's not Jellyfin or Plex's fault. Especially with anime most is in HEVC which is not supported by most browsers because of patents/licensing issues. Chrome and other Chromium based browsers added support recently but if you use Firefox that is probably the issue.

When my Internet shits the bed, will I be able to keep watching my stuff, or will jellyfin throw a hissy fit and refuse to work, like Plex does.

All accounts on Jellyfin are local so it works perfectly fine offline. My internet actually just went down for a couple hours yesterday and Jellyfin was the only thing I was able to watch.

And any other tips and tricks for migrating from Plex to jellyfin without having to do countless hours of manually configuring/editing my massive library, would be helpful.

One recommendation I have is just run both Plex and Jellyfin at the same time. You can point them at the same folders and they won't interfere with each other. Then if you end up not liking Jellyfin you can continue using Plex. Something that also helps with recognizing files correctly is if you include the imdb, TVDB, or TheMovieDB IDs in the file names. If you use the *arr apps they can rename them for you. For example all of my files have names like this so it is impossible for them to be misidentified:

Monogatari - S02E01 - Karen Bee Part 1 [imdb-tt1480925] [tvdb-102261] [Bluray-1080p] [x264] [FLAC 2.0].mkv

Blade Runner 2049 (2017) - [imdb-tt1856101] [tmdb-335984] [Bluray-2160p] [x265] [TrueHD Atmos 7.1].mkv