目标：利用科大讯飞将语音转写为文字，并保存到本地txt
在语音转写 https://www.xfyun.cn/services/lfasr 中申请API，并获取 appid 和 secret_key
语音转写 API 文档：https://www.xfyun.cn/doc/asr/lfasr/API.html#%E6%8E%A5%E5%8F%A3%E8%AF%B4%E6%98%8E
完整代码如下
# -*- coding: utf-8 -*-
# 非实时转写调用demo
# 语音转写
import base64
import hashlib
import hmac
import json
import os
import time
import requests
lfasr_host = 'http://raasr.xfyun.cn/api'
# 请求的接口名
api_prepare = '/prepare'
api_upload = '/upload'
api_merge = '/merge'
api_get_progress = '/getProgress'
api_get_result = '/getResult'
# 文件分片大小10M
file_piece_sice = 10485760
# ——————————————————转写可配置参数————————————————
# 参数可在官网界面（https://doc.xfyun.cn/rest_api/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.html）查看，根据需求可自行在gene_params方法里添加修改
# 转写类型
lfasr_type = 0
# 是否开启分词
has_participle = 'false'
has_seperate = 'true'
# 多候选词个数
max_alternatives = 0
# 子用户标识
suid = ''
class SliceIdGenerator:
"""slice id生成器"""
def __init__(self):
self.__ch = 'aaaaaaaaa`'
def getNextSliceId(self):
ch = self.__ch
j = len(ch) - 1
while j >= 0:
cj = ch[j]
if cj != 'z':
ch = ch[:j] + chr(ord(cj) + 1) + ch[j + 1:]
break
else:
ch = ch[:j] + 'a' + ch[j + 1:]
j = j - 1
self.__ch = ch
return self.__ch
class RequestApi(object):
def __init__(self, appid, secret_key, upload_file_path):
self.appid = appid
self.secret_key = secret_key
self.upload_file_path = upload_file_path
# 根据不同的apiname生成不同的参数,本示例中未使用全部参数您可在官网(https://doc.xfyun.cn/rest_api/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.html)查看后选择适合业务场景的进行更换
def gene_params(self, apiname, taskid=None, slice_id=None):
appid = self.appid
secret_key = self.secret_key
upload_file_path = self.upload_file_path
ts = str(int(time.time()))
m2 = hashlib.md5()
m2.update((appid + ts).encode('utf-8'))
md5 = m2.hexdigest()
md5 = bytes(md5, encoding='utf-8')
# 以secret_key为key, 上面的md5为msg， 使用hashlib.sha1加密结果为signa
signa = hmac.new(secret_key.encode('utf-8'), md5, hashlib.sha1).digest()
signa = base64.b64encode(signa)
signa = str(signa, 'utf-8')
file_len = os.path.getsize(upload_file_path)
file_name = os.path.basename(upload_file_path)
param_dict = {}
if apiname == api_prepare:
# slice_num是指分片数量，如果您使用的音频都是较短音频也可以不分片，直接将slice_num指定为1即可
slice_num = int(file_len / file_piece_sice) + (0 if (file_len % file_piece_sice == 0) else 1)
param_dict['app_id'] = appid
param_dict['signa'] = signa
param_dict['ts'] = ts
param_dict['file_len'] = str(file_len)
param_dict['file_name'] = file_name
param_dict['slice_num'] = str(slice_num)
elif apiname == api_upload:
param_dict['app_id'] = appid
param_dict['signa'] = signa
param_dict['ts'] = ts
param_dict['task_id'] = taskid
param_dict['slice_id'] = slice_id
elif apiname == api_merge:
param_dict['app_id'] = appid
param_dict['signa'] = signa
param_dict['ts'] = ts
param_dict['task_id'] = taskid
param_dict['file_name'] = file_name
elif apiname == api_get_progress or apiname == api_get_result:
param_dict['app_id'] = appid
param_dict['signa'] = signa
param_dict['ts'] = ts
param_dict['task_id'] = taskid
return param_dict
# 请求和结果解析，结果中各个字段的含义可参考：https://doc.xfyun.cn/rest_api/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.html
def gene_request(self, apiname, data, files=None, headers=None):
response = requests.post(lfasr_host + apiname, data=data, files=files, headers=headers)
result = json.loads(response.text)
if result["ok"] == 0:
print("{} success:".format(apiname) + str(result))
return result
else:
print("{} error:".format(apiname) + str(result))
exit(0)
return result
# 预处理
def prepare_request(self):
return self.gene_request(apiname=api_prepare,
data=self.gene_params(api_prepare))
# 上传
def upload_request(self, taskid, upload_file_path):
file_object = open(upload_file_path, 'rb')
try:
index = 1
sig = SliceIdGenerator()
while True:
content = file_object.read(file_piece_sice)
if not content or len(content) == 0:
break
files = {
"filename": self.gene_params(api_upload).get("slice_id"),
"content": content
}
response = self.gene_request(api_upload,
data=self.gene_params(api_upload, taskid=taskid,
slice_id=sig.getNextSliceId()),
files=files)
if response.get('ok') != 0:
# 上传分片失败
print('upload slice fail, response: ' + str(response))
return False
print('upload slice ' + str(index) + ' success')
index += 1
finally:
'file index:' + str(file_object.tell())
file_object.close()
return True
# 合并
def merge_request(self, taskid):
return self.gene_request(api_merge, data=self.gene_params(api_merge, taskid=taskid))
# 获取进度
def get_progress_request(self, taskid):
return self.gene_request(api_get_progress, data=self.gene_params(api_get_progress, taskid=taskid))
# 获取结果
def get_result_request(self, taskid):
return self.gene_request(api_get_result, data=self.gene_params(api_get_result, taskid=taskid))
def all_api_request(self):
# 1. 预处理
pre_result = self.prepare_request()
taskid = pre_result["data"]
# 2 . 分片上传
self.upload_request(taskid=taskid, upload_file_path=self.upload_file_path)
# 3 . 文件合并
self.merge_request(taskid=taskid)
# 4 . 获取任务进度
while True:
# 每隔20秒获取一次任务进度
progress = self.get_progress_request(taskid)
progress_dic = progress
if progress_dic['err_no'] != 0 and progress_dic['err_no'] != 26605:
print('task error: ' + progress_dic['failed'])
return
else:
data = progress_dic['data']
task_status = json.loads(data)
if task_status['status'] == 9:
print('task ' + taskid + ' finished')
break
print('The task ' + taskid + ' is in processing, task status: ' + str(data))
# 每次获取进度间隔20S
time.sleep(20)
# 5 . 获取结果
res = self.get_result_request(taskid=taskid)
# 保存到txt
data = res['data'].strip('[').strip(']')
for d in eval(data):
a = d['onebest']
fw.write(a + '\n') # 逐行保存
# 注意：如果出现requests模块报错："NoneType" object has no attribute 'read', 请尝试将requests模块更新到2.20.0或以上版本(本demo测试版本为2.20.0)
# 输入讯飞开放平台的appid，secret_key和待转写的文件路径
if __name__ == '__main__':
# 单个语音文件解析并保存
root = "D:/xxxx/"
filename = "xxxx" # mp3文件名，需修改
speechpath = root +filename
save_path = speechpath + '.txt' # txt与mp3同名，并保存在同一路径下
fw = open(save_path, 'w')
# 解析语音并保存到txt
api = RequestApi(appid="xxx", secret_key="xxx", upload_file_path=speechpath+".mp3")
api.all_api_request()