ffmpeg split by chapter

split.sh

#!/usr/bin/env bash 

# based on https://stackoverflow.com/a/61525373/520567

# you can play with -metadata and file name as you see fit

set -efu

videoFile="$1"
ffprobe -hide_banner \
        "$videoFile" \
        -print_format json \
        -show_chapters \
        -loglevel error |
    jq -r '.chapters[] | [ .id, .start_time, .end_time | tostring ] | join(" ")' |
    while read chapter start end; do
        ffmpeg -nostdin \
               -ss "$start" -to "$end" \
               -i "$videoFile" \
               -map 0 \
               -map_chapters -1 \
               -c copy \
               "${videoFile%.*}-$chapter.${videoFile##*.}";
    done

split_to_mp3_by_chapter.sh

#!/usr/bin/env bash 

# based on split_with_cover_playlist.sh

# supported params to override on command line:
# title="whatever" target="whatever" chapter_in_filename=1

set -efu

input="$1"

while shift && [[ "${1:-}" ]]; do
  opt="$1"
  varname="${opt%%=*}"
  varvalue="${opt#*=}"
  declare ${varname}="${varvalue}"
done

# for music you can use `--preset extreme`
lame_command='lame --alt-preset standard -a --lowpass 10 -b 32'
EXT2="mp3"
activation_bytes= # "-activation_bytes aax_secret"


json=$(ffprobe $activation_bytes -i "$input" -loglevel error -print_format json -show_format -show_chapters)
[[ "${title:-}" ]] || title=$(echo $json | jq -r ".format.tags.title")
count=$(echo $json | jq ".chapters | length")
if [[ -z "${target:-}" ]]; then
  target=$(echo $json | jq -r ".format.tags | .artist + \" - \" + .title")
  if [[ "$target" == " -"* ]] || [[ "$target" == *"- " ]]; then
    target="${input%.*}"
  fi
fi
: ${chapter_in_filename:=}

mkdir "$target"

echo "[playlist]
NumberOfEntries=$count" > "$target/0_Playlist.pls"

for i in $(seq -w 1 $count);
do
  j=$((10#$i))
  n=$(($j-1))
  start=$(echo $json | jq -r ".chapters[$n].start_time")
  end=$(echo $json | jq -r ".chapters[$n].end_time")
  name=$(echo $json | jq -r ".chapters[$n].tags.title")
  if [[ "$chapter_in_filename" ]]; then
    filepart=" ${name/\//-}"
  else
    filepart="-chapter"
  fi    
  ffmpeg $activation_bytes -nostdin -ss $start -to $end -i "$input" -map_chapters -1 -f wav -metadata title="$title $name" pipe:1 | $lame_command - "$target/$i${filepart}.$EXT2"
  echo "File$j=$i-chapter.$EXT2" >> "$target/0_Playlist.pls"
done

split_with_cover_playlist.sh

#!/usr/bin/env bash 

# based on https://stackoverflow.com/a/47901982/520567

input="$1"
EXT2="${input##*.}"
# activation_bytes="-activation_bytes aax_secret"

set -e

json=$(ffprobe $activation_bytes -i "$input" -loglevel error -print_format json -show_format -show_chapters)
title=$(echo $json | jq -r ".format.tags.title")
count=$(echo $json | jq ".chapters | length")
target=$(echo $json | jq -r ".format.tags | .date + \" \" + .artist + \" - \" + .title")
mkdir "$target"

ffmpeg $activation_bytes -i "$input" -frames:v 1 -f image2 "$target/cover.jpg"

echo "[playlist]
NumberOfEntries=$count" > "$target/0_Playlist.pls"

for i in $(seq -w 1 $count);
do
  j=$((10#$i))
  n=$(($j-1))
  start=$(echo $json | jq -r ".chapters[$n].start_time")
  end=$(echo $json | jq -r ".chapters[$n].end_time")
  name=$(echo $json | jq -r ".chapters[$n].tags.title")
  ffmpeg $activation_bytes -nostdin -ss $start -to $end -i "$input" -map_chapters -1 -map 0 -c copy -metadata title="$title $name" "$target/$i $name.$EXT2"
  echo "File$j=$i $name.$EXT2" >> "$target/0_Playlist.pls"
done