前言

一、PDF转为MP3 ？

我们平常看到很多文件都是PDF格式，网上的各类书籍多为此格式。有时候不方便阅读，或者怕费眼睛伤颈椎，那么有没有一种方法可以把它变为音频，这样上下班路上也就可以听一听。

这里做个科普，什么是TTS？TTS（Text To Speech，文本转语音）是语音合成应用的一种，它将储存于电脑中的文件，如帮助文件或者网页，转换成自然语音输出。edge-tts就是将微软的语音合成技术，他是将edge浏览器里提供的tts打包成Python第三方包，这样就可以免费调用微软的语音合成技术。

想到就动手，本次我们使用免费的开源库edge-tts来实现文本转语音操作，薅一下微软edge的羊毛！

二、准备工作

将PDF转为音频MP3文件，需要两步。第一步，将pdf转为txt文本；第二步，将txt转为音频。所以我们需要以下两个库。

1. 安装pdfplumber包，用于将pdf转为txt

(base) C:\Users\Administrator>pip install pdfplumber
Collecting pdfplumberDownloading pdfplumber-0.9.0-py3-none-any.whl (46 kB)━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 46.1/46.1 kB 385.4 kB/s eta 0:00:00
Collecting pdfminer.six==20221105Downloading pdfminer.six-20221105-py3-none-any.whl (5.6 MB)━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 5.6/5.6 MB 8.1 MB/s eta 0:00:00
Collecting Wand>=0.6.10Downloading Wand-0.6.11-py2.py3-none-any.whl (143 kB)━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 143.6/143.6 kB ? eta 0:00:00
Requirement already satisfied: Pillow>=9.1 in d:\programdata\anaconda3\lib\site-packages (from pdfplumber) (9.4.0)
Requirement already satisfied: charset-normalizer>=2.0.0 in d:\programdata\anaconda3\lib\site-packages (from pdfminer.six==20221105->pdfplumber) (2.0.4)
Requirement already satisfied: cryptography>=36.0.0 in d:\programdata\anaconda3\lib\site-packages (from pdfminer.six==20221105->pdfplumber) (39.0.1)
Requirement already satisfied: cffi>=1.12 in d:\programdata\anaconda3\lib\site-packages (from cryptography>=36.0.0->pdfminer.six==20221105->pdfplumber) (1.15.1)
Requirement already satisfied: pycparser in d:\programdata\anaconda3\lib\site-packages (from cffi>=1.12->cryptography>=36.0.0->pdfminer.six==20221105->pdfplumber) (2.21)
Installing collected packages: Wand, pdfminer.six, pdfplumber
Successfully installed Wand-0.6.11 pdfminer.six-20221105 pdfplumber-0.9.0

2. 安装edge-tts包，用于将txt转为音频

(base) C:\Users\Administrator>pip install edge-tts
Collecting edge-ttsDownloading edge_tts-6.1.5-py3-none-any.whl (27 kB)
Requirement already satisfied: aiohttp>=3.8.0 in d:\programdata\anaconda3\lib\site-packages (from edge-tts) (3.8.4)
Requirement already satisfied: yarl<2.0,>=1.0 in d:\programdata\anaconda3\lib\site-packages (from aiohttp>=3.8.0->edge-tts) (1.8.2)
Requirement already satisfied: multidict<7.0,>=4.5 in d:\programdata\anaconda3\lib\site-packages (from aiohttp>=3.8.0->edge-tts) (6.0.4)
Requirement already satisfied: frozenlist>=1.1.1 in d:\programdata\anaconda3\lib\site-packages (from aiohttp>=3.8.0->edge-tts) (1.3.3)
Requirement already satisfied: attrs>=17.3.0 in d:\programdata\anaconda3\lib\site-packages (from aiohttp>=3.8.0->edge-tts) (22.1.0)
Requirement already satisfied: async-timeout<5.0,>=4.0.0a3 in d:\programdata\anaconda3\lib\site-packages (from aiohttp>=3.8.0->edge-tts) (4.0.2)
Requirement already satisfied: aiosignal>=1.1.2 in d:\programdata\anaconda3\lib\site-packages (from aiohttp>=3.8.0->edge-tts) (1.3.1)
Requirement already satisfied: charset-normalizer<4.0,>=2.0 in d:\programdata\anaconda3\lib\site-packages (from aiohttp>=3.8.0->edge-tts) (2.0.4)
Requirement already satisfied: idna>=2.0 in d:\programdata\anaconda3\lib\site-packages (from yarl<2.0,>=1.0->aiohttp>=3.8.0->edge-tts) (3.4)
Installing collected packages: edge-tts
Successfully installed edge-tts-6.1.5

三、代码很简单

# -*- coding: utf-8 -*-import pdfplumber
import asyncio
import os
import edge_tts
from edge_tts import VoicesManager  async def txt2mp3(txt,mp3,announcer='Microsoft Server Speech Text to Speech Voice (zh-CN, XiaoxiaoNeural)') -> None:# 将文本转换为mp3音频communicate = edge_tts.Communicate(txt, announcer)  await communicate.save(mp3)async def get_announcer(Gender="Female", Language="zh"):voices = await VoicesManager.create()  voice = voices.find(Gender=Gender, Language=Language)print(voice)if __name__ == "__main__":  rootdir = 'd:\\python_csdn\\files\\'filename = '道德经.pdf'pdf_path = rootdir+filenameannouncer='Microsoft Server Speech Text to Speech Voice (zh-CN, XiaoxiaoNeural)'if 0:# 查看可用播音角色(性别女性，语言为中文)asyncio.run(get_announcer(Gender="Female", Language="zh"))if 1:# 读取pdf并提取文本到txt文件，并将其内容转为mp3音频文件。page_num = 0with pdfplumber.open(pdf_path) as pdf:for page in pdf.pages:textdata = page.extract_text().replace("\n", "")#提取文字后删除末尾换行，以免转音频卡顿page_num += 1txt_path = pdf_path.split(".")[0]+"{:03d}".format(page_num)+'.txt'if len(textdata)>0:with open(txt_path ,'a',encoding='utf-8') as txt:txt.write(textdata)print('第'+str(page_num)+'页:',textdata)mp3_path = txt_path.split(".")[0]+'.mp3'asyncio.run(txt2mp3(textdata,mp3_path))print('第'+str(page_num)+'个txt文件已转音频:',mp3_path)print('Pdf文件共有'+str(page_num)+'页，已转换完成')

很快就搞定啦，见下图。以后再想听PDF就把上面代码跑起来！

四、变更播音员

在以上程序中修改以下代码if条件为1，即可查看可用播音角色。

    if 1:# 查看可用播音角色(性别女性，语言为中文)，男性Gender="Male"asyncio.run(get_announcer(Gender="Female", Language="zh"))

运行后结果为一个list，通过json格式化后，如下所示。变更播音员只需要使用Name值替换前面announcer值即可。是不是很简单？

[{'Name': 'Microsoft Server Speech Text to Speech Voice (zh-HK, HiuGaaiNeural)','ShortName': 'zh-HK-HiuGaaiNeural','Gender': 'Female','Locale': 'zh-HK','SuggestedCodec': 'audio-24khz-48kbitrate-mono-mp3','FriendlyName': 'Microsoft HiuGaai Online (Natural) - Chinese (Cantonese Traditional)','Status': 'GA','VoiceTag': {'ContentCategories': ['General'],'VoicePersonalities': ['Friendly', 'Positive']},'Language': 'zh'
}, {'Name': 'Microsoft Server Speech Text to Speech Voice (zh-HK, HiuMaanNeural)','ShortName': 'zh-HK-HiuMaanNeural','Gender': 'Female','Locale': 'zh-HK','SuggestedCodec': 'audio-24khz-48kbitrate-mono-mp3','FriendlyName': 'Microsoft HiuMaan Online (Natural) - Chinese (Hong Kong)','Status': 'GA','VoiceTag': {'ContentCategories': ['General'],'VoicePersonalities': ['Friendly', 'Positive']},'Language': 'zh'
}, {'Name': 'Microsoft Server Speech Text to Speech Voice (zh-CN, XiaoxiaoNeural)','ShortName': 'zh-CN-XiaoxiaoNeural','Gender': 'Female','Locale': 'zh-CN','SuggestedCodec': 'audio-24khz-48kbitrate-mono-mp3','FriendlyName': 'Microsoft Xiaoxiao Online (Natural) - Chinese (Mainland)','Status': 'GA','VoiceTag': {'ContentCategories': ['News', 'Novel'],'VoicePersonalities': ['Warm']},'Language': 'zh'
}, {'Name': 'Microsoft Server Speech Text to Speech Voice (zh-CN, XiaoyiNeural)','ShortName': 'zh-CN-XiaoyiNeural','Gender': 'Female','Locale': 'zh-CN','SuggestedCodec': 'audio-24khz-48kbitrate-mono-mp3','FriendlyName': 'Microsoft Xiaoyi Online (Natural) - Chinese (Mainland)','Status': 'GA','VoiceTag': {'ContentCategories': ['Cartoon', 'Novel'],'VoicePersonalities': ['Lively']},'Language': 'zh'
}, {'Name': 'Microsoft Server Speech Text to Speech Voice (zh-CN-liaoning, XiaobeiNeural)','ShortName': 'zh-CN-liaoning-XiaobeiNeural','Gender': 'Female','Locale': 'zh-CN-liaoning','SuggestedCodec': 'audio-24khz-48kbitrate-mono-mp3','FriendlyName': 'Microsoft Xiaobei Online (Natural) - Chinese (Northeastern Mandarin)','Status': 'GA','VoiceTag': {'ContentCategories': ['Dialect'],'VoicePersonalities': ['Humorous']},'Language': 'zh'
}, {'Name': 'Microsoft Server Speech Text to Speech Voice (zh-TW, HsiaoChenNeural)','ShortName': 'zh-TW-HsiaoChenNeural','Gender': 'Female','Locale': 'zh-TW','SuggestedCodec': 'audio-24khz-48kbitrate-mono-mp3','FriendlyName': 'Microsoft HsiaoChen Online (Natural) - Chinese (Taiwan)','Status': 'GA','VoiceTag': {'ContentCategories': ['General'],'VoicePersonalities': ['Friendly', 'Positive']},'Language': 'zh'
}, {'Name': 'Microsoft Server Speech Text to Speech Voice (zh-TW, HsiaoYuNeural)','ShortName': 'zh-TW-HsiaoYuNeural','Gender': 'Female','Locale': 'zh-TW','SuggestedCodec': 'audio-24khz-48kbitrate-mono-mp3','FriendlyName': 'Microsoft HsiaoYu Online (Natural) - Chinese (Taiwanese Mandarin)','Status': 'GA','VoiceTag': {'ContentCategories': ['General'],'VoicePersonalities': ['Friendly', 'Positive']},'Language': 'zh'
}, {'Name': 'Microsoft Server Speech Text to Speech Voice (zh-CN-shaanxi, XiaoniNeural)','ShortName': 'zh-CN-shaanxi-XiaoniNeural','Gender': 'Female','Locale': 'zh-CN-shaanxi','SuggestedCodec': 'audio-24khz-48kbitrate-mono-mp3','FriendlyName': 'Microsoft Xiaoni Online (Natural) - Chinese (Zhongyuan Mandarin Shaanxi)','Status': 'GA','VoiceTag': {'ContentCategories': ['Dialect'],'VoicePersonalities': ['Bright']},'Language': 'zh'
}]

总结

查看所有播音角色，执行命令：>edge-tts --list-voices

(base) C:\Users\Administrator>edge-tts --list-voices
Name: af-ZA-AdriNeural
Gender: FemaleName: af-ZA-WillemNeural
Gender: MaleName: am-ET-AmehaNeural
Gender: MaleName: am-ET-MekdesNeural
Gender: FemaleName: ar-AE-FatimaNeural
Gender: FemaleName: ar-AE-HamdanNeural
Gender: MaleName: ar-BH-AliNeural
Gender: MaleName: ar-BH-LailaNeural
Gender: FemaleName: ar-DZ-AminaNeural
Gender: FemaleName: ar-DZ-IsmaelNeural
Gender: MaleName: ar-EG-SalmaNeural
Gender: FemaleName: ar-EG-ShakirNeural
Gender: MaleName: ar-IQ-BasselNeural
Gender: MaleName: ar-IQ-RanaNeural
Gender: FemaleName: ar-JO-SanaNeural
Gender: FemaleName: ar-JO-TaimNeural
Gender: MaleName: ar-KW-FahedNeural
Gender: MaleName: ar-KW-NouraNeural
Gender: FemaleName: ar-LB-LaylaNeural
Gender: FemaleName: ar-LB-RamiNeural
Gender: MaleName: ar-LY-ImanNeural
Gender: FemaleName: ar-LY-OmarNeural
Gender: MaleName: ar-MA-JamalNeural
Gender: MaleName: ar-MA-MounaNeural
Gender: FemaleName: ar-OM-AbdullahNeural
Gender: MaleName: ar-OM-AyshaNeural
Gender: FemaleName: ar-QA-AmalNeural
Gender: FemaleName: ar-QA-MoazNeural
Gender: MaleName: ar-SA-HamedNeural
Gender: MaleName: ar-SA-ZariyahNeural
Gender: FemaleName: ar-SY-AmanyNeural
Gender: FemaleName: ar-SY-LaithNeural
Gender: MaleName: ar-TN-HediNeural
Gender: MaleName: ar-TN-ReemNeural
Gender: FemaleName: ar-YE-MaryamNeural
Gender: FemaleName: ar-YE-SalehNeural
Gender: MaleName: az-AZ-BabekNeural
Gender: MaleName: az-AZ-BanuNeural
Gender: FemaleName: bg-BG-BorislavNeural
Gender: MaleName: bg-BG-KalinaNeural
Gender: FemaleName: bn-BD-NabanitaNeural
Gender: FemaleName: bn-BD-PradeepNeural
Gender: MaleName: bn-IN-BashkarNeural
Gender: MaleName: bn-IN-TanishaaNeural
Gender: FemaleName: bs-BA-GoranNeural
Gender: MaleName: bs-BA-VesnaNeural
Gender: FemaleName: ca-ES-EnricNeural
Gender: MaleName: ca-ES-JoanaNeural
Gender: FemaleName: cs-CZ-AntoninNeural
Gender: MaleName: cs-CZ-VlastaNeural
Gender: FemaleName: cy-GB-AledNeural
Gender: MaleName: cy-GB-NiaNeural
Gender: FemaleName: da-DK-ChristelNeural
Gender: FemaleName: da-DK-JeppeNeural
Gender: MaleName: de-AT-IngridNeural
Gender: FemaleName: de-AT-JonasNeural
Gender: MaleName: de-CH-JanNeural
Gender: MaleName: de-CH-LeniNeural
Gender: FemaleName: de-DE-AmalaNeural
Gender: FemaleName: de-DE-ConradNeural
Gender: MaleName: de-DE-KatjaNeural
Gender: FemaleName: de-DE-KillianNeural
Gender: MaleName: el-GR-AthinaNeural
Gender: FemaleName: el-GR-NestorasNeural
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Gender: FemaleName: en-GB-ThomasNeural
Gender: MaleName: en-HK-SamNeural
Gender: MaleName: en-HK-YanNeural
Gender: FemaleName: en-IE-ConnorNeural
Gender: MaleName: en-IE-EmilyNeural
Gender: FemaleName: en-IN-NeerjaExpressiveNeural
Gender: FemaleName: en-IN-NeerjaNeural
Gender: FemaleName: en-IN-PrabhatNeural
Gender: MaleName: en-KE-AsiliaNeural
Gender: FemaleName: en-KE-ChilembaNeural
Gender: MaleName: en-NG-AbeoNeural
Gender: MaleName: en-NG-EzinneNeural
Gender: FemaleName: en-NZ-MitchellNeural
Gender: MaleName: en-NZ-MollyNeural
Gender: FemaleName: en-PH-JamesNeural
Gender: MaleName: en-PH-RosaNeural
Gender: FemaleName: en-SG-LunaNeural
Gender: FemaleName: en-SG-WayneNeural
Gender: MaleName: en-TZ-ElimuNeural
Gender: MaleName: en-TZ-ImaniNeural
Gender: FemaleName: en-US-AnaNeural
Gender: FemaleName: en-US-AriaNeural
Gender: FemaleName: en-US-ChristopherNeural
Gender: MaleName: en-US-EricNeural
Gender: MaleName: en-US-GuyNeural
Gender: MaleName: en-US-JennyNeural
Gender: FemaleName: en-US-MichelleNeural
Gender: FemaleName: en-US-RogerNeural
Gender: MaleName: en-US-SteffanNeural
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Gender: FemaleName: en-ZA-LukeNeural
Gender: MaleName: es-AR-ElenaNeural
Gender: FemaleName: es-AR-TomasNeural
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Gender: MaleName: es-BO-SofiaNeural
Gender: FemaleName: es-CL-CatalinaNeural
Gender: FemaleName: es-CL-LorenzoNeural
Gender: MaleName: es-CO-GonzaloNeural
Gender: MaleName: es-CO-SalomeNeural
Gender: FemaleName: es-CR-JuanNeural
Gender: MaleName: es-CR-MariaNeural
Gender: FemaleName: es-CU-BelkysNeural
Gender: FemaleName: es-CU-ManuelNeural
Gender: MaleName: es-DO-EmilioNeural
Gender: MaleName: es-DO-RamonaNeural
Gender: FemaleName: es-EC-AndreaNeural
Gender: FemaleName: es-EC-LuisNeural
Gender: MaleName: es-ES-AlvaroNeural
Gender: MaleName: es-ES-ElviraNeural
Gender: FemaleName: es-GQ-JavierNeural
Gender: MaleName: es-GQ-TeresaNeural
Gender: FemaleName: es-GT-AndresNeural
Gender: MaleName: es-GT-MartaNeural
Gender: FemaleName: es-HN-CarlosNeural
Gender: MaleName: es-HN-KarlaNeural
Gender: FemaleName: es-MX-DaliaNeural
Gender: FemaleName: es-MX-JorgeNeural
Gender: MaleName: es-NI-FedericoNeural
Gender: MaleName: es-NI-YolandaNeural
Gender: FemaleName: es-PA-MargaritaNeural
Gender: FemaleName: es-PA-RobertoNeural
Gender: MaleName: es-PE-AlexNeural
Gender: MaleName: es-PE-CamilaNeural
Gender: FemaleName: es-PR-KarinaNeural
Gender: FemaleName: es-PR-VictorNeural
Gender: MaleName: es-PY-MarioNeural
Gender: MaleName: es-PY-TaniaNeural
Gender: FemaleName: es-SV-LorenaNeural
Gender: FemaleName: es-SV-RodrigoNeural
Gender: MaleName: es-US-AlonsoNeural
Gender: MaleName: es-US-PalomaNeural
Gender: FemaleName: es-UY-MateoNeural
Gender: MaleName: es-UY-ValentinaNeural
Gender: FemaleName: es-VE-PaolaNeural
Gender: FemaleName: es-VE-SebastianNeural
Gender: MaleName: et-EE-AnuNeural
Gender: FemaleName: et-EE-KertNeural
Gender: MaleName: fa-IR-DilaraNeural
Gender: FemaleName: fa-IR-FaridNeural
Gender: MaleName: fi-FI-HarriNeural
Gender: MaleName: fi-FI-NooraNeural
Gender: FemaleName: fil-PH-AngeloNeural
Gender: MaleName: fil-PH-BlessicaNeural
Gender: FemaleName: fr-BE-CharlineNeural
Gender: FemaleName: fr-BE-GerardNeural
Gender: MaleName: fr-CA-AntoineNeural
Gender: MaleName: fr-CA-JeanNeural
Gender: MaleName: fr-CA-SylvieNeural
Gender: FemaleName: fr-CH-ArianeNeural
Gender: FemaleName: fr-CH-FabriceNeural
Gender: MaleName: fr-FR-DeniseNeural
Gender: FemaleName: fr-FR-EloiseNeural
Gender: FemaleName: fr-FR-HenriNeural
Gender: MaleName: ga-IE-ColmNeural
Gender: MaleName: ga-IE-OrlaNeural
Gender: FemaleName: gl-ES-RoiNeural
Gender: MaleName: gl-ES-SabelaNeural
Gender: FemaleName: gu-IN-DhwaniNeural
Gender: FemaleName: gu-IN-NiranjanNeural
Gender: MaleName: he-IL-AvriNeural
Gender: MaleName: he-IL-HilaNeural
Gender: FemaleName: hi-IN-MadhurNeural
Gender: MaleName: hi-IN-SwaraNeural
Gender: FemaleName: hr-HR-GabrijelaNeural
Gender: FemaleName: hr-HR-SreckoNeural
Gender: MaleName: hu-HU-NoemiNeural
Gender: FemaleName: hu-HU-TamasNeural
Gender: MaleName: id-ID-ArdiNeural
Gender: MaleName: id-ID-GadisNeural
Gender: FemaleName: is-IS-GudrunNeural
Gender: FemaleName: is-IS-GunnarNeural
Gender: MaleName: it-IT-DiegoNeural
Gender: MaleName: it-IT-ElsaNeural
Gender: FemaleName: it-IT-IsabellaNeural
Gender: FemaleName: ja-JP-KeitaNeural
Gender: MaleName: ja-JP-NanamiNeural
Gender: FemaleName: jv-ID-DimasNeural
Gender: MaleName: jv-ID-SitiNeural
Gender: FemaleName: ka-GE-EkaNeural
Gender: FemaleName: ka-GE-GiorgiNeural
Gender: MaleName: kk-KZ-AigulNeural
Gender: FemaleName: kk-KZ-DauletNeural
Gender: MaleName: km-KH-PisethNeural
Gender: MaleName: km-KH-SreymomNeural
Gender: FemaleName: kn-IN-GaganNeural
Gender: MaleName: kn-IN-SapnaNeural
Gender: FemaleName: ko-KR-InJoonNeural
Gender: MaleName: ko-KR-SunHiNeural
Gender: FemaleName: lo-LA-ChanthavongNeural
Gender: MaleName: lo-LA-KeomanyNeural
Gender: FemaleName: lt-LT-LeonasNeural
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Gender: FemaleName: mr-IN-ManoharNeural
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Gender: MaleName: vi-VN-HoaiMyNeural
Gender: FemaleName: vi-VN-NamMinhNeural
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Gender: Male

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【Python小技巧】将pdf转为txt，并使用edge-tts将txt批量转为MP3（不想看书想听书的转过来，送源代码）

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前言