Print runtime length of a video (and number of estimated frames)

avcheck.sh

#!/bin/bash

avcheck()
{
avprobe "$1" -show_packets 2>/dev/null |
awk -F'=' -vN="$1" '
/^\[/	{ if (arm && k["codec_type"]=="video") { last=k["dts_time"]; # printf "%s", k["flags"];
	}; delete k; arm=1; next; }
arm	{ k[$1]=$2; }
$0=="codec_type=video" { frames++; }
END	{ printf("%-40s %d:%02d:%02d %s\n", N, last/3600, last/60%60, last%60, frames); }' 
}

for a
do
	avcheck "$a"
done