ebook convert base on eCore

book-convert.sh

#!/bin/bash
workdir=$(pwd)
filepath=$1
format=$2
outdir=$3
book_convert(){
    filepath=$1
    format=$2
    tmp_dir="$HOME/Downloads/eCoreCmdtmp/$(uuidgen)"
    mkdir -p $tmp_dir
    # rm -rf "$HOME/Downloads/eCoreCmdtmp"
    dirname=$(dirname "$filepath")
    input_file_type=$(echo ".${filepath##*.}")
    basename=$(basename -s $input_file_type "$filepath")
    origin_name=$(basename "$filepath")
    newfile_neme=$basename"."$format
    echo "- Convert $basename to $format"
    echo "$workdir/eCoreCmd c $dirname/$origin_name $outdir/$newfile_neme $tmp_dir"
    $workdir/eCoreCmd c "$dirname/$origin_name" "$outdir/$newfile_neme" "$tmp_dir"
    rm -rf $tmp_dir
    echo "- Done! $origin_name , output file: $newfile_neme"
}

book_convert "$1" $2

This script is used to simplify the eCore tool to convert books.

eCore is an eBook format conversion tool that supports many formats, such as epub, mobi, azw3, etc., with high conversion efficiency.

The new version of eCore is available from Epubor Ultimate

eCore is only available in macOS and Windows versions. I am using this script on macOS.

curl -o epubor_ultimate.zip 'https://download.epubor.com/epubor_ultimate.zip'
unzip epubor_ultimate.zip
pkgutil --expand-full Ultimate.pkg  out
r

You can find the following three files inside out/Payload/Contents/MacOS/plugins, which are the conversion tools we need.
eCoreCmd is the executability file, eCore.dylib is the dependency library, and eCore.dat is the license file, currently as of 2030.

.
├── eCore.dat
├── eCore.dylib
└── eCoreCmd

You can copy these files and put them in the new directory eCore, save the scripts from my gist to this directory as well, and they will be ready to use.
Like this:
./book-convert.sh /path/xxx.azw3 epub /path/output-dir

I can process 3000 epub files in about 20 minutes or so by using 8 tasks to convert in parallel.

ls book/ | xargs -P8 -I{} ./book-convert.sh "book/{}" epub /path/output-dir

The reason for writing this script is that eCore's commands are so difficult to use.

*********************************************************************
 Epubor eCore
 Version          : 1.0.9.970
 Copyright        : https://www.epubor.com/ecore.html

 Licensed to      : Epubor   https://www.epubor.com
 AuthorityEndDate : 2030-07-01
*********************************************************************
Format:
    eCoreCmd g <InputFile> <TempDirectory> <MetaDataFile> <CoverImageFile>
    eCoreCmd s <InputFile> <TempDirectory> <MetaDataFile>
    eCoreCmd s <InputFile> <TempDirectory> [-t <title>] [-a <author>] [-p <publisher>] [-l <language>] [-d <publishdate>] [-isbn <ISBN>] [-asin <ASIN>] [-desc <description>] [-cover <cover file name>]
    eCoreCmd c <InputFile> <OutputFile> <TempDirectory> [-l <language>] [-v] [-tre <regexstr>]

Epubor Ultimate is NOT FREE software!

@caihk We use it for research purposes only. Alternatively, you can send an email to request their development license.