640x480

#!/bin/bash

if [ "$1" = "" ]; then echo "format: `basename $0` ms"; exit; fi

echo "removing /dev/shm/out.*.raw"
rm -f /dev/shm/out.*.raw

if [ "$2" = "" ]; then fps=90; else fps=$2; fi
echo "capturing frames for ${1}ms with ${fps}fps requested"
raspiraw -md 7 -t $1 -ts tstamps.csv -hd0 hd0.32k --height 480 --top 0 --vinc 17 --fps $fps -sr 1 -o /dev/shm/out.%04d.raw 2>/dev/null >/dev/null

us=`cut -f1 -d, tstamps.csv | sort -n | uniq -c | sort -n | tail -1 | cut -b9-`
l=`ls -l /dev/shm/out.*.raw | wc --lines`
echo "$l frames were captured at $((1000000 / $us))fps" 

echo "frame delta time[us] distribution"
cut -f1 -d, tstamps.csv | sort -n | uniq -c

D=`echo "0123456789" | sed "s/\`echo $((1000000/$fps)) | cut -b1\`//"`

echo "after skip frame indices (middle column)"
grep "^[$D]" tstamps.csv | sed "s/^/> /"

skips=`grep "^[$D]" tstamps.csv | wc --lines | cut -f1 -d\ `
stamps=`wc --lines tstamps.csv | cut -f1 -d\ `
per=`expr \( 100 \* $skips \) / \( $skips + $stamps \)`
echo "$per% frame skips"