achesco · October 25, 2025 04:38 · davidwebca · Nov 29, 2020 · nielsbom · Jan 14, 2024
diff --git a/split-to-scenes.sh b/split-to-scenes.sh
 # Splits video to separate scenes files
 # Inspired by https://stackoverflow.com/a/38205105

 #!/bin/bash

 file=""
 out="./"
 diff=0.4
 bitrate="512k"
 trim=0
 stripaudio=""

 usage () {
  echo "Usage: $(basename $0) [[[-o folder] [-d ratio]] | [-h]] -f file.mp4"
  echo
  echo "Options:"
  echo "-f, --file          Input file"
  echo "-o, --out           Outpup files folder path, default"
  echo "                    to current folder"
  echo "-d, --diff          Number from 0 to 1, default to 0.4."
  echo "                    Scene change difference factor"
  echo "-b, --bitrate       Bitrate to encode parts, default to 512k"
  echo "-t, --trim          Trim last given seconds number, default 0"
  echo "-sa, --strip-audio  Strip audio"
  echo "-h, --help          Display this help message"
  echo
  echo "Example: split.sh -d 0.5 -o /tmp/parts -f file.mp4"
  echo "Splits file.mp4 file to scenes with change more than 0.5"
  echo "and saves output parts to /tmp/parts folder"
 }

 if [ "$1" = "" ]; then
  usage
 fi

 while [ "$1" != "" ]; do
  case $1 in
    -f | --file )
      shift
      file=$1
      ;;
    -d | --diff )
      shift
      diff=$1
      ;;
    -o | --out )
      shift
      out=$1
      ;;
    -b | --bitrate )
      shift
      bitrate=$1
      ;;
    -t | --trim )
      shift
      trim=$1
      ;;
    -sa | --strip-audio )
      stripaudio="-an"
      ;;
    -h | --help )
      usage
      exit
      ;;
    * )
      usage
      exit 1
  esac
  shift
 done

 cut_part () {
  duration_flag=""
  if [ "$3" != "" ]; then
    duration_flag="-t"
  fi
  ffmpeg -loglevel error -hide_banner -ss $1 $duration_flag $3 -i $file \
    -vcodec libx264 -movflags faststart -b $bitrate $stripaudio \
    -y $out/`printf "%04d_%s" $2 $filename` < /dev/null
 }

 filename=`basename $file`
 mkdir -p $out
 timefrom=0
 i=1
 while read -r timestamp; do
  duration=`bc <<< "$timestamp-$timefrom-$trim" | awk '{printf "%f", $0}'`
  cut_part $timefrom $i $duration
  timefrom=$timestamp
  i=`expr $i + 1`
 done < <(
  ffmpeg -i $file -filter:v "select='gt(scene,$diff)',showinfo" -f null - 2>&1 | \
    grep Parsed_showinfo | grep pts_time:[0-9.]* -o | grep "[0-9]*\.[0-9]*" -o
 )

 if [ $timefrom != 0 ]; then
  cut_part $timefrom $i
 fi
	# Splits video to separate scenes files
	# Inspired by https://stackoverflow.com/a/38205105

	#!/bin/bash

	file=""
	out="./"
	diff=0.4
	bitrate="512k"
	trim=0
	stripaudio=""

	usage () {
	echo "Usage: $(basename $0) [[[-o folder] [-d ratio]] \| [-h]] -f file.mp4"
	echo
	echo "Options:"
	echo "-f, --file Input file"
	echo "-o, --out Outpup files folder path, default"
	echo " to current folder"
	echo "-d, --diff Number from 0 to 1, default to 0.4."
	echo " Scene change difference factor"
	echo "-b, --bitrate Bitrate to encode parts, default to 512k"
	echo "-t, --trim Trim last given seconds number, default 0"
	echo "-sa, --strip-audio Strip audio"
	echo "-h, --help Display this help message"
	echo
	echo "Example: split.sh -d 0.5 -o /tmp/parts -f file.mp4"
	echo "Splits file.mp4 file to scenes with change more than 0.5"
	echo "and saves output parts to /tmp/parts folder"
	}

	if [ "$1" = "" ]; then
	usage
	fi

	while [ "$1" != "" ]; do
	case $1 in
	-f \| --file )
	shift
	file=$1
	;;
	-d \| --diff )
	shift
	diff=$1
	;;
	-o \| --out )
	shift
	out=$1
	;;
	-b \| --bitrate )
	shift
	bitrate=$1
	;;
	-t \| --trim )
	shift
	trim=$1
	;;
	-sa \| --strip-audio )
	stripaudio="-an"
	;;
	-h \| --help )
	usage
	exit
	;;
	* )
	usage
	exit 1
	esac
	shift
	done

	cut_part () {
	duration_flag=""
	if [ "$3" != "" ]; then
	duration_flag="-t"
	fi
	ffmpeg -loglevel error -hide_banner -ss $1 $duration_flag $3 -i $file \
	-vcodec libx264 -movflags faststart -b $bitrate $stripaudio \
	-y $out/`printf "%04d_%s" $2 $filename` < /dev/null
	}

	filename=`basename $file`
	mkdir -p $out
	timefrom=0
	i=1
	while read -r timestamp; do
	duration=`bc <<< "$timestamp-$timefrom-$trim" \| awk '{printf "%f", $0}'`
	cut_part $timefrom $i $duration
	timefrom=$timestamp
	i=`expr $i + 1`
	done < <(
	ffmpeg -i $file -filter:v "select='gt(scene,$diff)',showinfo" -f null - 2>&1 \| \
	grep Parsed_showinfo \| grep pts_time:[0-9.]* -o \| grep "[0-9]\.[0-9]" -o
	)

	if [ $timefrom != 0 ]; then
	cut_part $timefrom $i
	fi