SOLVED: Playback issues with certain files

[Schos]

Hi there!
So I have been using Jellyfin for a couple of years without any major issues more with a lot of satisfaction.
Anyhow, a couple of days ago I realized, that new media was not automatically added, so I played around a lot and realized, that all of a sudden .ISO files are stopping the library scan. Which is no big deal as Jellyfin was not able to play them anyway. So right now, I am not able to play SOME media files reliable on many devices (Android TV with Jellyfin App, Mobilephone with Jellyfin App, Web Browser, Windows Client with Jellyfin Desktop App).
So I created another container with the most basic configuration (no reverse proxy, nothing), scanned the library and were not able to play some media. All my files are owned by 1000:1000, and have 664 / 775 permission.
All media is served via NFS, the container is run by root

This is my compose 

Code:

services:
  jellyfin2:
    image: jellyfin/jellyfin:latest
    container_name: jellyfin2
    restart: unless-stopped
    devices:
      - /dev/dri/renderD128:/dev/dri/renderD128
      - /dev/dri/card0:/dev/dri/card0
    environment:
      - TZ=Europe/Vienna
    volumes:
      - /data/container/jellyfin2-config:/config
      - /data/container/jellyfin2-cache:/cache
      - /mnt/Media:/data/Media:ro
    ports:
      - 8097:8096

I run the container on an Intel NUC which is powerful enough for transcoding and all that.

I have a debug log as well:

• Part 1: https://pastebin.com/iQ4R1TdY
  
• Part 2: https://pastebin.com/yyQm6iGS
  

The log displays me starting a file and watching it for one second (search for "Mission - Impossible"). After that, I try to play two other files, but I can't find anything about that in the logs. I only see the Image of the movie with the blue loading carousel without anything happening.

My guess is some issue with remuxing / transcoding.

Please let me know what else I can supply to help you help me ;-)
Thank you!


SOLUTION:
My issue was, that the files were shared via NFSv3. Switching to NFSv4 solved everything. Be sure to check out https://jellyfin.org/docs/general/admini...orage/#nfs for more information
And for sure I misconfigured the transcoding. This post helped finding the right codecs based on my CPU: https://forum.jellyfin.org/t-playback-is...2#pid49552