Converting epub file into mp3 audiobook. Example for my blog post (in Polish) https://abcserverless.pl/polly-zrobi-nam-audiobooka/

epub2mp3.py

import textwrap
from epub_conversion.utils import convert_epub_to_lines, convert_lines_to_text, open_book
import boto3
from contextlib import closing
from pydub import AudioSegment
import os


def split_epub(book_name):
    book = open_book(book_name)
    if book is not None:
        str = ""
        lines = convert_epub_to_lines(book)
        for sentence in lines:
            for text in convert_lines_to_text(sentence, 'a'):
                text = text.replace('\n', '')
                text = text.replace('& # 160 ;', '')
                str += text
        lines = textwrap.wrap(str, 1500, break_long_words=False)
        return lines

def create_audio_files(lines, output_title):
    client = boto3.client('polly',
                          aws_access_key_id='',
                          aws_secret_access_key='' )

    output_file = AudioSegment.silent(duration=2000)

    for l in lines:
        try:
            response = client.synthesize_speech(
                OutputFormat='mp3',
                Text=l,
                TextType='text',
                VoiceId='Maja'
            )
        except ClientError as e:
            print(e)
            sys.exit(-1)

        print("{} {}".format(len(l), l))
        print(response['ResponseMetadata']['HTTPStatusCode'])

        if "AudioStream" in response:
            with closing(response["AudioStream"]) as stream:
                output = "part.mp3"
                try:
                    with open(output, "wb") as file:
                        file.write(stream.read())
                    slice = AudioSegment.from_mp3(output)
                    output_file = output_file + slice
                    os.remove(output)  # remove part file
                except IOError as e:
                    print(e)
                    sys.exit(-1)

    output_file.export(output_title, format="mp3")


lines = split_epub('2.epub')
create_audio_files(lines, "full2.mp3")