Try putting in a MP4. Same command, just replace the extension for "newFile". Remuxing live TV is hit or missing when it comes to corruption depending on the source.
Jellyfin 10.10.1 (Docker)
Ubuntu 24.04 LTS
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
3x WD Red Pro 6TB CMR in RAIDZ1 (JF Library)