initial

random-screenshots.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+PROGNAME="$0"
+
+set -e
+#set -x
+
+usage() {
+	echo "usage: $PROGNAME FILENAME NUMBER"
+	exit
+}
+
+get_duration() {
+	ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$1" | awk '{print int($1+0.5)}'
+}
+
+[ $# -lt 2 ] && usage
+
+file="$1"
+left="$2"
+
+duration=$(get_duration "$file")
+#echo "duration: $duration"
+
+for n in $(seq 1 $left); do
+	time=$(shuf -i 1-$duration -n 1)
+	ffmpeg -y -nostats -loglevel error -ss $time -i "$file" -frames:v 1 -q:v 2 "${file}_$n.jpg" </dev/null || true
+done

strip-video-metadata.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+[ -z "$1" ] && {
+	echo "usage: $0 FILENAME"
+	exit 1
+}
+
+set -e
+
+file="$1"
+
+ffmpeg -i "$file" \
+	-map_metadata -1 \
+	-map_chapters -1\
+	-fflags +bitexact \
+	-metadata:s handler_name='' \
+	-metadata:s DURATION='' \
+	-metadata:s VENDOR_ID='' \
+	-empty_hdlr_name 1 \
+	-acodec copy -vcodec copy \
+	"nometa_$file"
+rm "$file"
+mv "nometa_$file" "$file"

to-frames.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+[ -z "$1" ] && {
+	echo "usage: $0 FILENAME"
+	exit 1
+}
+
+set -e
+
+ffmpeg -i "$1" -qscale:v 2 output_%03d.jpg

total-duration.sh

@@ -0,0 +1,35 @@
+#!/bin/sh
+
+set -e
+
+get_duration() {
+	ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$1" | awk '{print int($1+0.5)}'
+}
+
+[ -z "$1" ] && {
+	echo "usage: $0 FILENAME [FILENAME ...]"
+	echo "   or: $0 *.mp4"
+	exit 1
+}
+
+total=0
+while [ $# -gt 0 ]; do
+	if [ -f "$1" ]; then
+		dur=$(get_duration "$1")
+		total=$(( total+dur ))
+	else
+		>&2 echo "error: $1: no such file"
+		exit 1
+	fi
+	shift
+done
+
+echo "$total seconds"
+
+days=$(( total / 86400 ))
+if [ $days -gt 0 ]; then
+	echo -n "${days}d "
+fi
+
+human="$(date -d@$total -u +%H:%M:%S)"
+echo "$human"

webdlrip.sh

@@ -0,0 +1,78 @@
+#!/bin/sh
+
+set -e
+#set -x
+
+die() {
+	>&2 echo "error: $@"
+	exit 1
+}
+
+usage() {
+	>&2 echo "usage: $0 [OPTIONS] FILENAME"
+	>&2 echo
+	>&2 echo "options:"
+	>&2 echo "   -h|--height  set video height, default is 720"
+	>&2 echo "   -265         encode with H.265"
+	>&2 echo
+	exit 1
+}
+
+do_webdlrip() {
+	filename="$(basename -- "$FILE")"
+	filename="${filename%.*}"
+
+	newname="$filename.mp4"
+
+	audio_params="-c:a aac -b:a 128k"
+	if [ "$HEVC" = "1" ]; then
+		video_params="-c:v libx265 -crf 27 -preset slow -vtag hvc1 -x265-params no-info=1"
+	else
+		video_params="-c:v libx264 -preset slow -crf 23 -bsf:v 'filter_units=remove_types=6'"
+	fi
+
+	ffmpeg -i "$FILE" -vf scale=-1:$HEIGHT,format=yuv420p \
+		-map_metadata -1 -map_chapters -1 \
+		-fflags +bitexact -flags:v +bitexact -flags:a +bitexact \
+		-metadata:s handler_name='' \
+		-metadata:s DURATION='' \
+		-metadata:s VENDOR_ID='' \
+		-metadata:s encoder='' \
+		-empty_hdlr_name 1 \
+		$video_params $audio_params \
+		-vf sidedata=delete,metadata=delete \
+		"webdlrip_$newname"
+	rm "$FILE"
+	mv "webdlrip_$newname" "$FILE"
+}
+
+[ -z "$1" ] && usage
+
+FILE=
+HEIGHT=720
+
+while [ $# -gt 0 ]; do
+	case $1 in
+		-h|--height)
+			HEIGHT="$2"
+			shift
+			;;
+		-265)
+			HEVC=1
+			;;
+		*)
+			[ -n "$FILE" ] && die "unexpected argument: $1"
+			FILE="$1"
+			;;
+	esac
+	shift
+done
+
+[ -z "$FILE" ] && usage
+[ -f "$FILE" ] || die "$FILE: file not found"
+
+echo "filename: $FILE"
+echo "  height: $HEIGHT"
+echo
+
+do_webdlrip