1#!/bin/bash 2 3set -euo pipefail 4 5in_file="$1" 6out_file="$2" 7files="$(find "$1" -type f -name '*Z.mp4' | sort)" 8concat="concat.txt" 9echo '' > concat.txt 10for file in $files; do 11 echo "file '$file'" >> concat.txt 12done 13ffmpeg -f concat -safe 0 -i concat.txt -c:v copy -c:a aac "$2.mp4"