singular-they-is-good

#!/usr/bin/env bash

if [ ! -f "$1" ] || [ -z $2 ]; then
    echo "usage: $0 path/to/video.mkv <size in bytes>" >&2
    exit 1
fi

mediainfo=$(which mediainfo 2>&1)
if [ $? != 0 ]; then
    echo "$0: error: mediainfo not installed or not in "'$PATH' >&2
    exit 1
fi

bc=$(which bc 2>&1)
if [ $? != 0 ]; then
    echo "$0: error: bc not installed or not in "'$PATH' >&2
    exit 1
fi

file="$1"
duration=$(mediainfo --Inform='General;%Duration%' "$file")
bytes=$2
bitrate=$(bc -l <<< "$bytes * 8000 / $duration")
echo $bitrate