Analyze FLAC file to determine if it has wasted bits

show-wasted-bits.bash

#!/bin/bash

# https://hydrogenaud.io/index.php/topic,97746.0.html 
temp_file="$(mktemp)"
trap 'rm -f -- "$temp_file"' EXIT
 
bps="$( metaflac --show-bps "$1" )"
flac --analyze --stdout "$1" 2>/dev/null | grep --fixed-strings 'wasted_bits' | cut -d '=' -f 3 | cut -f 1 > "$temp_file"
tbps=0
n=0
while read wasted_bits; do
    tbps=$(( tbps + ( bps - wasted_bits ) ))
    ((n++))
done < "$temp_file"
abps=$(( ( ( tbps * 10 / n) + 5 ) / 10 )) # (* 10 + 5) / 10 for proper rounding 
printf "%2u/%2u bits\t%s\n" "$abps" "$bps" "$1"