1.流程
1)换取token
用Api Key 和 SecretKey。访问https://openapi.baidu.com/oauth/2.0/token 换取 token
// appKey = Va5yQRHl********LT0vuXV4
// appSecret = 0rDSjzQ20XUj5i********PQSzr5pVw2
https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials&client_id=Va5yQRHl********LT0vuXV4&client_secret=0rDSjzQ20XUj5i********PQSzr5pVw2
返回:
{
"access_token": "1.a6b7dbd428f731035f771b8d********.86400.1292922000-2346678-124328",
"expires_in": 2592000,
"refresh_token": "2.385d55f8615fdfd9edb7c4b********.604800.1293440400-2346678-124328",
"scope": "public audio_tts_post ...",
"session_key": "ANXxSNjwQDugf8615Onqeik********CdlLxn",
"session_secret": "248APxvxjCZ0VEC********aK4oZExMB",
}
scope中含有audio_tts_post 表示有语音合成能力,没有该audio_tts_post 的token调用接口会返回502错误。 在结果中可以看见 token = 1.a6b7dbd428f731035f771b8d********.86400.1292922000-2346678-124328,在2592000秒(30天)后过期
2)访问合成接口
#从上文中我们获取的token是 1.a6b7dbd428f731035f771b8d********.86400.1292922000-2346678-124328
http://tsn.baidu.com/text2audio?lan=zh&ctp=1&cuid=abcdxxx&tok=1.a6b7dbd428f731035f771b8d****.86400.1292922000-2346678-124328&tex=%e7%99%be%e5%ba%a6%e4%bd%a0%e5%a5%bd&vol=9&per=0&spd=5&pit=5&aue=3
// 这是一个正常MP3的下载url
// tex在实际开发过程中请urlencode2次
"""
tex | 必填 | 合成的文本,使用UTF-8编码。小于2048个中文字或者英文数字。(文本在百度服务器内转换为GBK后,长度必须小于4096字节) |
tok | 必填 | 开放平台获取到的开发者access_token(见上面的“鉴权认证机制”段落) |
cuid | 必填 | 用户唯一标识,用来计算UV值。建议填写能区分用户的机器 MAC 地址或 IMEI 码,长度为60字符以内 |
ctp | 必填 | 客户端类型选择,web端填写固定值1 |
lan | 必填 | 固定值zh。语言选择,目前只有中英文混合模式,填写固定值zh |
spd | 选填 | 语速,取值0-15,默认为5中语速 |
pit | 选填 | 音调,取值0-15,默认为5中语调 |
vol | 选填 | 音量,取值0-15,默认为5中音量 |
per | 选填 | 发音人选择, 0为普通女声,1为普通男生,3为情感合成-度逍遥,4为情感合成-度丫丫,默认为普通女声 |
aue | 选填 | 3为mp3格式(默认); 4为pcm-16k;5为pcm-8k;6为wav(内容同pcm-16k); 注意aue=4或者6是语音识别要求的格式,但是音频内容不是语音识别要求的自然人发音,所以识别效果会受影 |
- aue =3 ,返回为二进制mp3文件,具体header信息 Content-Type: audio/mp3;
- aue =4 ,返回为二进制pcm文件,具体header信息 Content-Type:audio/basic;codec=pcm;rate=16000;channel=1
- aue =5 ,返回为二进制pcm文件,具体header信息 Content-Type:audio/basic;codec=pcm;rate=8000;channel=1
- aue =6 ,返回为二进制wav文件,具体header信息 Content-Type: audio/wav;
"""
2.api 代码demo
# coding=utf-8
import sys
import json
IS_PY3 = sys.version_info.major == 3
if IS_PY3:
from urllib.request import urlopen
from urllib.request import Request
from urllib.error import URLError
from urllib.parse import urlencode
from urllib.parse import quote_plus
else:
import urllib2
from urllib import quote_plus
from urllib2 import urlopen
from urllib2 import Request
from urllib2 import URLError
from urllib import urlencode
API_KEY = '4E1BG9lTnlSeIf1NQFlrSq6h'
SECRET_KEY = '544ca4657ba8002e3dea3ac2f5fdd241'
TEXT = "欢迎使用百度语音合成。"
# 发音人选择, 0为普通女声,1为普通男生,3为情感合成-度逍遥,4为情感合成-度丫丫,默认为普通女声
PER = 4
# 语速,取值0-15,默认为5中语速
SPD = 5
# 音调,取值0-15,默认为5中语调
PIT = 5
# 音量,取值0-9,默认为5中音量
VOL = 5
# 下载的文件格式, 3:mp3(default) 4: pcm-16k 5: pcm-8k 6. wav
AUE = 3
FORMATS = {3: "mp3", 4: "pcm", 5: "pcm", 6: "wav"}
FORMAT = FORMATS[AUE]
CUID = "123456PYTHON"
TTS_URL = 'http://tsn.baidu.com/text2audio'
class DemoError(Exception):
pass
""" TOKEN start """
TOKEN_URL = 'http://openapi.baidu.com/oauth/2.0/token'
SCOPE = 'audio_tts_post' # 有此scope表示有tts能力,没有请在网页里勾选
def fetch_token():
print("fetch token begin")
params = {'grant_type': 'client_credentials',
'client_id': API_KEY,
'client_secret': SECRET_KEY}
post_data = urlencode(params)
if (IS_PY3):
post_data = post_data.encode('utf-8')
req = Request(TOKEN_URL, post_data)
try:
f = urlopen(req, timeout=5)
result_str = f.read()
except URLError as err:
print('token http response http code : ' + str(err.code))
result_str = err.read()
if (IS_PY3):
result_str = result_str.decode()
print(result_str)
result = json.loads(result_str)
print(result)
if ('access_token' in result.keys() and 'scope' in result.keys()):
if not SCOPE in result['scope'].split(' '):
raise DemoError('scope is not correct')
print('SUCCESS WITH TOKEN: %s ; EXPIRES IN SECONDS: %s' % (result['access_token'], result['expires_in']))
return result['access_token']
else:
raise DemoError('MAYBE API_KEY or SECRET_KEY not correct: access_token or scope not found in token response')
""" TOKEN end """
if __name__ == '__main__':
token = fetch_token()
tex = quote_plus(TEXT) # 此处TEXT需要两次urlencode
print(tex)
params = {'tok': token, 'tex': tex, 'per': PER, 'spd': SPD, 'pit': PIT, 'vol': VOL, 'aue': AUE, 'cuid': CUID,
'lan': 'zh', 'ctp': 1} # lan ctp 固定参数
data = urlencode(params)
print('test on Web Browser' + TTS_URL + '?' + data)
req = Request(TTS_URL, data.encode('utf-8'))
has_error = False
try:
f = urlopen(req)
result_str = f.read()
headers = dict((name.lower(), value) for name, value in f.headers.items())
has_error = ('content-type' not in headers.keys() or headers['content-type'].find('audio/') < 0)
except URLError as err:
print('asr http response http code : ' + str(err.code))
result_str = err.read()
has_error = True
save_file = "error.txt" if has_error else 'result.' + FORMAT
with open(save_file, 'wb') as of:
of.write(result_str)
if has_error:
if (IS_PY3):
result_str = str(result_str, 'utf-8')
print("tts api error:" + result_str)
print("result saved as :" + save_file)
3.sdk下载
pip install baidu-aip
4.sdk demo代码
# coding=utf-8
from aip import AipSpeech
API_KEY = 'DHEl3FqU9oxxx' # 替换成你的api_key 在创建的应用中查找
SECRET_KEY = 'ZWGxEZjxxxxIMx7BeGnoW83u' # 替换成你的secret_key 在创建的应用中查找
APP_ID = '1xx3x3' # 替换成你的app_id
client = AipSpeech(APP_ID, API_KEY, SECRET_KEY)
result = client.synthesis(u'baidu是一家科技公司', 'zh', 1, {
'vol': 5, 'per': 5, 'spd': 4
})
# vol 控制音量 per 控制男女声 spd 控制速度
if not isinstance(result, dict):
with open('auido.mp3', 'wb') as f:
f.write(result)