#!/bin/bash
######################################################################
#Copyright (C) 2024  Kris Occhipinti
#https://filmsbykris.com

#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 version 3 of the License.

#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 for more details.

#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.
######################################################################

file=$1
fn=${1##*/}
dir=${file%$fn}
name=${fn%.*}
ext=${fn#$name}

echo -n "Scanning ${file} ..."
ffmpeg -i "$file" \
	-filter:v "select='gt(scene,0.4)',showinfo" \
	-f null \
	- 2>&1 | tee ffout | while read l; do echo -n "."; done

echo ""

timestamps=(0)
stamps=$(grep showinfo ffout | grep pts_time:[0-9.]* -o | grep [0-9.]* -o)
timestamps+=($stamps)

timestamps+=($(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$file"))

for ((i = 1; i < ${#timestamps[@]}; i++)); do
	printf -v part '%02d' "$i"
	echo ffmpeg -ss "${timestamps[i - 1]}" -to "${timestamps[i]}" -i "$file" "$dir$name-$part$ext"
done