scripts/shell/.local/bin/iso-to-mkv

#!/usr/bin/env bash
SEARCH_DIR="${1:-$(pwd)}"
OUT_DIR="${2:-"$SEARCH_DIR/out"}"
mkdir -p "$OUT_DIR"
prev_season=""
ep=1

find "$SEARCH_DIR" -type f -iname '*.iso' | sort | while read -r iso; do
  echo "$iso"
  parent=$(basename "$(dirname "$iso")")
  [[ $parent =~ S([0-9]+) ]] || continue
  season=$(printf "%02d" "${BASH_REMATCH[1]}")

  [[ $season != "$prev_season" ]] && { ep=1; prev_season=$season; }

  ripdir="$OUT_DIR/temp/$parent"
  mkdir -p "$ripdir" "$OUT_DIR/Season $season"
  snap run makemkv.makemkvcon -r mkv --minlength=1800 iso:"$iso" all "$ripdir"

  for mkv in "$ripdir"/*.mkv; do
    out="$OUT_DIR/Season $season/S${season}E$(printf "%02d" "$ep").mkv"
    ffmpeg -nostdin -hide_banner -loglevel error -i "$mkv" \
      -map 0:v -map 0:a:m:language:eng -map 0:s:m:language:eng \
      -c copy "$out"
    rm "$mkv"
    ((ep++))
  done
done