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djotto/mp4.sh

Forked from anonymous/mp4.sh
Created May 20, 2017
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Merge multiple mp4 files as chapters
#! /usr/bin/env bash
####################################################
# Required Libraries
#
# library name | commands used | verified version
# ------------------------------------------------
# ffmpeg | ffmpeg/ffprobe | 3.1.4 3.2
# gpac | mp4box | 0.6.1
# mp4v2 | mp4chaps | 2.0.0
# coreutils | grealpath/gdate | 8.25
#
# Usage
# ./mp4.sh merge_as_chapter input*.mp4 output.mp4
#
####################################################
check_dependency(){
echo "ffmpeg $(echo_if $(program_is_installed ffmpeg))"
echo "gpac $(echo_if $(program_is_installed mp4box))"
echo "mp4v2 $(echo_if $(program_is_installed mp4chaps))"
echo "coreutils $(echo_if $(program_is_installed grealpath))"
}
# Merge multiple mp4 files as chapters
# - Each input file name will be the chapter title
# - Chapter markers in the input files will NOT be preserved
# - Each input file must be extractly same format
merge_as_chapter(){
echo "### Merge As Chapter ###"
if [ "$#" -lt 2 ]; then
echo "Error: Wrong number of parameters:"
echo "Usage: merge_as_chapter input.mp4 [input.mp4...] output.mp4"
return
fi
local output=${!#}
set -- "${@:1:$# -1}"
local chapterfile=$(printf "%s-%s" "/tmp/chapterfile" "$(basename ${output} .${output##*.})")
merge_file "$@" "$output" &&
create_chapterfile "$@" > "$chapterfile" &&
add_chaptermark "$chapterfile" "$output"
}
# Merge multiple mp4 files
# - Chapter markers in the input files will NOT be preserved
# - Each input file must be extractly same format
merge_file(){
echo "### Merge File ###"
if [ "$#" -lt 2 ]; then
echo "Usage: merge_file input.mp4 [input.mp4...] output.mp4"
return
fi
local output=${!#}
set -- "${@:1:$# -1}"
echo "input :" "$@"
echo "output:" "$output"
ffmpeg -n -f concat -safe 0 -i <(create_filelist "$@") -c copy "$output"
}
add_chaptermark(){
echo "### Add Chaptermark ###"
if [ "$#" -ne 2 ]; then
echo "Usage: add_chaptermark chapterfile file.mp4"
return
fi
local chapterfile="$1"
local input="$2"
echo "chapterfile:" "$chapterfile"
mp4box -chap "$chapterfile" "$input" &&
mp4chaps --convert --chapter-qt "$input"
}
create_chapterfile(){
echo "### Create Chapterfile ###"
if [ "$#" -lt 1 ]; then
echo "Usage: create_chapterfile input.mp4 [input.mp4...]"
return
fi
local chapter_start=0
local chapter_end=0
for ((i=1; i<=$#; i++)); do
file="${!i}"
local chapter_name=$(basename "$file" .mp4)
local chapter_number=$(printf "CHAPTER%s" "$i")
local duration=$(duration "$file")
printf "%s=%s\n" "$chapter_number" $(gdate -d@"$chapter_start" -u +%T.%3N) | tee -a /tmp/create_chapterfile.log
printf "%sNAME=%s\n" "$chapter_number" "$chapter_name" | tee -a /tmp/create_chapterfile.log
chapter_end=$(bc <<< "scale=6;$chapter_end+ $duration")
chapter_start=$(bc <<< "scale=6;$chapter_end+ 0.001")
done
}
create_filelist(){
for file in "$@"; do
printf "file %q\n" "$(grealpath "$file")" | tee -a /tmp/create_filelist.log
done
}
duration(){
ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$1"
}
# ==============================================
# https://gist.github.com/JamieMason/4761049
# ==============================================
function program_is_installed {
local return_=1
type $1 >/dev/null 2>&1 || { local return_=0; }
echo "$return_"
}
function echo_fail {
printf "\e[31m✘ ${1}"
echo -e "\033[0m"
}
function echo_pass {
printf "\e[32m✔ ${1}"
echo -e "\033[0m"
}
function echo_if {
if [ $1 == 1 ]; then
echo_pass $2
else
echo_fail $2
fi
}
# ==============================================
# call arguments verbatim:
"$@"
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