SOLVED: Transcoding of one video, but playing directly another seemingly similar video

[KamilKurde]

Hi, thanks for the reply!

These are 4k UHD Blu rays, correct?

Yes, both of them

Try using Mediainfo to examine the video files for their HDR format to see if there is a difference and take it from there

The only difference I see in the video, is that Minecraft has specified "Maximum Content Light Level" and "Maximum Frame-Average Light Level" while Drive doesn't
And that Minecraft has lower bitrate (59.0 Mb/s vs 64.1 Mb/s) all other properties (except size and Bits/(Pixel*Frame)) are the same

Also try turning off transcoding completely and see what happens.

It then refused to play altogether.
While fidling with the transcoding checkmarks, it turned out that I have to have audio transcoding enabled to play Minecraft, so I guess for some reason the issue is with audio?
I converted Minecraft using ffmpeg so that it uses AAC (which didn't help) and then to LC AAC (since that's what should be "most compatible" from what I understood), with no luck in playing the file without transcoding on jellyfin server.
But then I tried using external players (MPV Player, VLC) and another Jellyfin client (DUNE), and all of them had no issue with playing without transcoding (although MPV doesn't seem to pass HDR data to the TV).

So, at the moment, I'll mark this thread as solved (by using external players). Thanks!