converto-to-mp4.sh

#!/bin/bash
set -eu

convert_to_mp4 () {
    input="$1"
    output="${input%.*}.mp4"
    ffmpeg -i "$input" -c:v libx264 -crf 23 -profile:v high -r 30 -c:a libfaac -q:a 100 -ar 48000 "$output"
}

errors=0
for f in "$@"
do
    convert_to_mp4 "$f" || let errors++
done

if (( errors > 0 ))
then
    echo "$errors errors for $# input files"
    exit 1
fi