Hardware transcoding is not working on TOS7, but falls back to software transcoding. Currently running Emby 4.10.0.24 on TOS 7.0.0804 and a Terramaster F4-423.
edit - added another transcode log file
embyserver.txt ffmpeg-transcode-78b6f604-c3f3-48e1-bab4-dc2858fb5c73_1.txt hardware_detection-63922203450.txt
ffmpeg-transcode-6632f32a-4646-46cc-b677-ec91ae38fd01_1.txt