From 04030c08f1bf7ebe7f0a1f6dfd737e4ec1ff93e2 Mon Sep 17 00:00:00 2001
From: Evgeny Zinoviev <me@ch1p.io>
Date: Tue, 7 Jun 2022 01:04:44 +0300
Subject: tools: add video-util.sh (WIP)

---
 tools/video-util.sh | 333 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 333 insertions(+)
 create mode 100755 tools/video-util.sh

(limited to 'tools')

diff --git a/tools/video-util.sh b/tools/video-util.sh
new file mode 100755
index 0000000..5c4cfd1
--- /dev/null
+++ b/tools/video-util.sh
@@ -0,0 +1,333 @@
+#!/bin/bash
+
+set -e
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+PROGNAME="$0"
+BOLD=$(tput bold)
+RST=$(tput sgr0)
+RED=$(tput setaf 1)
+GREEN=$(tput setaf 2)
+YELLOW=$(tput setaf 3)
+CYAN=$(tput setaf 6)
+
+input=
+command=
+roi_file=
+motion_threshold=1
+ffmpeg_args="-nostats -loglevel error"
+dvr_scan_args="-q"
+verbose=
+config_dir=$HOME/.config/video-util
+config_dir_set=
+
+debug() {
+	if [ -n "$verbose" ]; then
+		>&2 echo "$@"
+	fi
+}
+
+echoinfo() {
+	echo "${CYAN}$@${RST}"
+}
+
+echoerr() {
+	>&2 echo "${RED}${BOLD}error:${RST}${RED} $@${RST}"
+}
+
+echowarn() {
+	>&2 echo "${YELLOW}${BOLD}warning:${RST}${YELLOW} $@${RST}"
+}
+
+die() {
+    >&2 echo "error: $@"
+    exit 1
+}
+
+file_in_use() {
+	[ -n "$(lsof "$1")" ]
+}
+
+get_mtime() {
+	stat -c %Y "$1"
+}
+
+# converts date in format yyyy-mm-dd-hh.ii.ss to unixtime
+date_to_unixtime() {
+	local date="$1"
+	date=${date//./-}
+	date=${date//-/ }
+
+	local nums=($date)
+	
+	local y=${nums[0]}
+	local m=${nums[1]}
+	local d=${nums[2]}
+	local h=${nums[3]}
+	local i=${nums[4]}
+	local s=${nums[5]}
+
+	date --date="$y-$m-$d $h:$i:$s" +"%s"
+}
+
+filename_as_unixtime() {
+	local name="$1"
+	name="$(basename "$name")"
+	name="${name/record_/}"
+	name="${name/.mp4/}"
+	date_to_unixtime "$name"
+}
+
+config_get_prev_mtime() {
+	local prefix="$1"
+	[ -z "$prefix" ] && die "config_get_prev_mtime: no prefix"
+
+	local file="$config_dir/${prefix}_mtime"
+	if [ -f "$file" ]; then
+		debug "config_get_prev_mtime: $(cat "$file")"
+		cat "$file"
+	else
+		debug "config_get_prev_mtime: 0"
+		echo "0"
+	fi
+}
+
+config_set_prev_mtime() {
+	local prefix="$1"
+	[ -z "$prefix" ] && die "config_set_prev_mtime: no prefix"
+
+	local mtime="$2"
+	[ -z "$mtime" ] && die "config_set_prev_mtime: no mtime"
+
+	local file="$config_dir/${prefix}_mtime"
+	
+	debug "config_set_prev_mtime: writing '$mtime' to '$file'"
+	echo "$mtime" > "$file"
+}
+
+usage() {
+	cat <<-_EOF 
+	usage: $PROGNAME OPTIONS command
+
+	Options:
+	    -i|--input    input file/directory
+	    -o|--output   output file/directory
+	    --roi-file    path to file with ROI sets
+	    -mt           motion threshold
+	    -v, -vv, vx   be verbose
+	    --config-dir  config directory
+
+	Commands:
+	    fix, mass-fix  fix video timestamps
+	    mass-fix-mtime fix mtimes of recordings
+	    motion         detect motion
+	    snapshot       take video snapshot
+
+	_EOF
+	exit 1
+}
+
+check_input_file() {
+	[ -z "$input" ] && die "input file not specified"
+	[ -f "$input" ] || die "input file '$input' doesn't exist"
+}
+
+check_input_dir() {
+	[ -z "$input" ] && die "input directory not specified"
+	[ -d "$input" ] || die "input directory '$input' doesn't exist"
+}
+
+fix_video_timestamps() {
+	local input="$1"
+	local dir=$(dirname "$input")
+	local temp="$dir/.temporary_fixing.mp4"
+
+	local mtime=$(get_mtime "$input")
+
+	# debug "fix_video_timestamps: ffmpeg $ffmpeg_args -i \"$input\" -y -c copy \"$temp\""
+	ffmpeg $ffmpeg_args -i "$input" -y -c copy "$temp" </dev/null
+	rm "$input"
+	mv "$temp" "$input"
+
+	local unixtime=$(filename_as_unixtime "$input")
+	touch --date=@$unixtime "$input"
+}
+
+do_mass_fix() {
+	local mtime=$(config_get_prev_mtime "fix")
+	local tmpfile=$(mktemp)
+	debug "do_mass_fix: created temporary file $tmpfile"
+	
+	touch --date=@$mtime "$tmpfile"
+	debug "do_mass_fix: mtime of temp file: $(get_mtime $tmpfile)"
+	
+	[ -f "$input/.temporary_fixing.mp4" ] && {
+		echowarn "do_mass_fix: '$input/.temporary_fixing.mp4' exists, deleting"
+		rm "$input/.temporary_fixing.mp4"
+	}
+
+	# find all files in $input directory, newer than $tmpfile's time,
+	# sort them in ascending order, and finally remove timestamps
+	# leaving only file names. Then loop through each line
+	find "$input" -type f -newer "$tmpfile" -printf "%T+ %p\n" | sort | awk '{print $2}' | while read file; do
+		if ! file_in_use "$file"; then
+			debug "do_mass_fix: calling fix_video_timestamps($file)"
+			
+			fix_video_timestamps "$file"
+			echoinfo "fixed $file"
+		
+			config_set_prev_mtime "fix" "$(filename_as_unixtime "$file")"
+		else
+			echowarn "file '$file' is in use"
+		fi
+	done
+
+	rm "$tmpfile"
+}
+
+do_mass_fix_mtime() {
+	local time
+	find "$input" -type f -name "*.mp4" | while read file; do
+		if [[ "$(basename "$file")" =~ ^record_.* ]]; then
+			time="$(filename_as_unixtime "$file")"
+			debug "$file: $time"
+			touch --date=@$time "$file"
+		else
+			echowarn "unrecognized file: $file"
+		fi
+	done
+}
+
+do_motion() {
+	local timecodes=()
+	if [ -z "$roi_file" ]; then
+		timecodes+=($(dvr_scan "$input"))
+	else
+		[ -f "$roi_file" ] || die "specified ROI sets file does not exists"
+		echoinfo "using roi sets from file: ${BOLD}$roi_file"
+		while read line; do
+			if ! [[ "$line" =~ ^#.*  ]]; then
+				timecodes+=("$(dvr_scan "$input" "$line")")
+			fi
+		done < <(cat "$roi_file")
+	fi
+
+	timecodes="${timecodes[@]}"
+	timecodes=${timecodes// /,}
+
+	echo "all timecodes: $timecodes"
+}
+
+dvr_scan_fake() {
+	echo "00:05:06.930,00:05:24.063"
+}
+
+dvr_scan() {
+	local input="$1"
+	local args=
+	if [ ! -z "$2" ]; then
+		args="-roi $2"
+		echoinfo "starting dvr-scan, roi=($2), mt=$motion_threshold"
+	else
+		echoinfo "starting dvr-scan, no roi, mt=$motion_threshold"
+	fi
+	dvr-scan $dvr_scan_args -i "$input" -so --min-event-length 3s -df 3 --frame-skip 2 -t $motion_threshold $args | tail -1
+}
+
+[[ $# -lt 1 ]] && usage
+
+while [[ $# -gt 0 ]]; do
+	case $1 in
+		-i|--input)
+			input="$2"
+			shift; shift
+			;;
+
+		--roi-file)
+			roi_file="$2"
+			shift; shift
+			;;
+
+		-mt)
+			motion_threshold="$2"
+			shift; shift
+			;;
+
+		fix|mass-fix|motion|snapshot|mass-fix-mtime)
+			command="$1"
+			shift
+			;;
+
+		-v)
+			verbose=1
+			shift
+			;;
+
+		-vx)
+			verbose=1
+			set -x
+			shift
+			;;
+
+		-vv)
+			verbose=1
+			ffmpeg_args="-loglevel info"
+			dvr_scan_args=""
+			shift
+			;;
+
+		--config-dir)
+			config_dir="$2"
+			config_dir_set=1
+			shift; shift
+			;;
+
+		*)
+			die "unrecognized option $1"
+			exit 1
+			;;
+	esac
+done
+
+[ -z "$config_dir_set" ] && echowarn "no --config-dir specified, using default ($config_dir)"
+if [ ! -d "$config_dir" ]; then
+	mkdir "$config_dir" || die "failed to create config directory ($config_dir)"
+fi
+
+[ -z "$command" ] && die "command not specified"
+case "$command" in
+	fix)
+		check_input_file
+		fix_video_timestamps "$input"
+		echo "done"
+		;;
+
+	mass-fix)
+		check_input_dir
+		do_mass_fix
+		;;
+
+	mass-fix-mtime)
+		check_input_dir
+		do_mass_fix_mtime
+		;;
+
+	motion)
+		check_input_file
+		do_motion
+		;;
+
+	snapshot)
+		check_input_file
+		[ -z "$output" ] && {
+			echowarn "--output not specified, using snapshot.jpg as default"
+			output="snapshot.jpg"
+		}
+		ffmpeg $ffmpeg_args -i "$input" -frames:v 1 -q:v 2 "$output" </dev/null
+		echoinfo "saved to $output"
+		;;
+
+	*)
+		echo "error: invalid command '$command'"
+		;;
+esac
-- 
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