qctoolsummary

#!/bin/bash
# Summarize qctools csv
# Run like: qctoolsummary movie.qctools.csv
csv="$1"
MID8BIT=128
BROADCASTYHIGH=235
BROADCASTYLOW=16
YAVG_COL=24
YHIGH_COL=25
YLOW_COL=23

Y_AVERAGE=$(cut -d, -f $YAVG_COL "$csv" | tail -n +2 | awk '{sum+=$1} END { print sum/NR}')
echo "The average luminosity value (0-255) is: $Y_AVERAGE"
Y_AVERAGE_OFF=$(echo $Y_AVERAGE - $MID8BIT | bc)
echo "Distance of average luminosity value to midpoint: $Y_AVERAGE_OFF"

Y_HIGH=$(cut -d, -f $YHIGH_COL "$csv" | tail -n +2 | awk '{sum+=$1} END { print sum/NR}')
echo "The average 95th percentile luminosity value (0-255) is: $Y_HIGH"
Y_HIGH_OFF=$(echo $Y_HIGH - $BROADCASTYHIGH | bc)
echo "Distance from broadcast black limit: $Y_HIGH_OFF"

Y_LOW=$(cut -d, -f $YLOW_COL "$csv" | tail -n +2 | awk '{sum+=$1} END { print sum/NR}')
echo "The average 10th percentile luminosity value (0-255) is: $Y_LOW"
Y_LOW_OFF=$(echo $Y_LOW - $BROADCASTYLOW | bc)
echo "Distance from broadcast black limit: $Y_LOW_OFF"

Y_85LUMA_RANGE=$(echo $Y_HIGH - $Y_LOW | bc)
echo "The average range of luminosity from 10th to 95th percentile luma values: $Y_85LUMA_RANGE"