Hardware recommendation? Would this be adequate?

[TheDreadPirate]

I don't know about TVHeadEnd, but you can do this in jellyfin with a post processing script.  An example from mine, though I'm just copying the content from the original TS container to MP4.  Adjust the ffmpeg command appropriately.

Code:

#!/bin/bash

INPUTFILE=$1   # This is the path variable in the Jellyfin screenshot above
NEWFILE=$(echo "$INPUTFILE" | sed 's/\.ts/\.mp4/g')

/usr/lib/jellyfin-ffmpeg/ffmpeg -nostdin -y -fflags +genpts+igndts -i "$INPUTFILE" -map 0 -codec copy -max_muxing_queue_size 2048 -avoid_negative_ts disabled -max_interleave_delta 0 "$NEWFILE"

rm -f "$INPUTFILE"