#!/bin/bash

if [ "$#" -ne 2 ]; then
  echo "USAGE: $0 FILE FACTOR"
  exit 1
fi

fullpath="$1"
factor=$(echo "1.0 $2" | awk '{printf "%.2f", $1/$2}')

source fileextensions
outfile="$dir/$filename""Speed.mp4"

echo "$outfile"

ffmpeg -y -i "$fullpath" -filter:v "setpts=$factor*PTS" "$outfile"