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 10.10.7 (Docker)
Ubuntu 24.04.2 LTS w/HWE
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
4x WD Red Pro 6TB CMR in RAIDZ1