#!/bin/bash

# Basic bash script to use ffmpeg to convert videos to m4a.
# Script usage: ./conv-video-to-audio.sh input.mp4 output.m4a

INPUT=$1
OUTPUT=$2

if ! command -v ffmpeg -version > /dev/null 2>&1; then
  echo "Ffmpeg is not available! You will need to install it to use this script."
   exit 1
fi

if [[ -z $INPUT ]] || [[ -z $OUTPUT ]]; then
   echo "Video to audio converter usage: input.webm output.m4a"
   exit 1
fi

if [ ! -f $INPUT ]; then
   echo "File $INPUT doesn't exist!"
   exit 1
fi

ffmpeg -i "$INPUT" -vn -acodec aac "$OUTPUT"