--- /dev/null
+#!/bin/bash
+
+set -eu
+
+pattern="${1:-mkv}"
+
+for i in *.out; do
+ actual="$(ls "$i" | grep -c "$pattern")"
+ expected="$(grep -c "$pattern" "${i%%.out}".txt)"
+ if [ "$actual" -ne "$expected" ]; then
+ echo "$i" "$expected" "$actual"
+ fi
+done