find-cuts

#!/bin/sh
#
# Copyright 2015 by Chris Osborn <fozztexx@fozztexx.com>
#
# This file is part of viddin.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License at <http://www.gnu.org/licenses/> for
# more details.

PCT=0.4	# Set the threshold for considering a frame as the same (1.0 is 100% percent)

while [ $# -gt 0 -a `expr substr "${1:-empty}" 1 2` = "--" ] ; do
    case "$1" in
	--threshold)
	    PCT="$2"
	    shift 2
	    ;;
	*)
	    echo Unknown flag "$1"
	    exit 1
	    ;;
    esac
done

LOGFILE=/tmp/split.$$

VIDEO="$1"
SPLITS="$2"

if [ -z "${VIDEO}" ] ; then
    echo Please specify video to scan 1>&2
    exit 1
fi
if [ -z "${SPLITS}" ] ; then
    echo Please specify file to write cut locations into 1>&2
    exit 1
fi
if [ ! -f "${VIDEO}" ] ; then
    echo "${VIDEO}" not found
    exit 1
fi

ffmpeg -i "${VIDEO}" -filter:v "select='gt(scene,${PCT})',showinfo" -f null - 2>&1 | tee ${LOGFILE}

grep showinfo ${LOGFILE} | grep 'pts_time:[0-9.]*' -o | grep '[0-9.]*' -o > "${SPLITS}"

rm -f ${LOGFILE}