An N100 should be able to handle at least two 4K HDR to SDR streams. What OS are you running? And you aren't running out of disk space for the transcodes?
Jellyfin 10.10.3 (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)