A simple script to rename the mp4s in a directory into something that Plex likes. YMMV.

gistfile1.sh

for i in *.mp4; do
  ffprobe "$i" 2>&1 | awk -v i="$i" '
    BEGIN { FS=": " }
    /title/ { title=$2 }
    /artist/ { artist=$2 }
    /track/ { sub(/\/12/,"",$2); track=$2 }
    /album/ { sub(/^.*Pt\. /,"",$2); season=$2 }
    END {
      printf("mv \"%s\" \"%s - s%02de%02d - %s.mp4\"\n", i, artist, season, track, title)
    }'
done | bash