Elongate your footage (n) times

gistfile1.txt

function elongate() {
	file_path=$(pwd)
	file_name=$(basename "${1}")
	file_ext="${file_name##*.}"
	file_name="${file_name%.*}"

	loop_by=10
	if [ "$2" ]
	then
		loop_by=${2}
	fi
	ffmpeg -f concat -i <(for i in {1..$loop_by}; do printf "file '$file_path/$file_name.$file_ext'\n"; done) -c copy $file_name\__extended.$file_ext
}