本文为大家分享了python实现大音频文件语音识别功能的具体代码，供大家参考，具体内容如下
实现思路：先用ffmpeg将其他非wav格式的音频转换为wav格式，并转换音频的声道(百度支持声道为1)，采样率(值为8000)，格式转换完成后，再用ffmpeg将音频切成百度。
支持的时长(30秒和60秒2种，本程序用的是30秒)。
# coding: utf-8
import json
import time
import base64
from inc import rtysdb
import urllib2
import requests
import os
import uuid
from inc import db_config
class BaiduRest:
def __init__(self, cu_id, api_key, api_secert):
self.token_url = "/oauth/2.0/token?grant_type=client_credentials&client_id=%s&client_secret=%s"
self.getvoice_url = "/text2audio?tex=%s&lan=zh&cuid=%s&ctp=1&tok=%s"
self.upvoice_url = '/server_api'
self.cu_id = cu_id
self.get_token(api_key, api_secert)
return
def get_token(self, api_key, api_secert):
token_url = self.token_url % (api_key, api_secert)
r_str = urllib2.urlopen(token_url).read()
token_data = json.loads(r_str)
self.token_str = token_data['access_token']
return True
# 语音合成
def text2audio(self, text, filename):
get_url = self.getvoice_url % (urllib2.quote(text), self.cu_id, self.token_str)
voice_data = urllib2.urlopen(get_url).read()
voice_fp = open(filename, 'wb+')
voice_fp.write(voice_data)
voice_fp.close()
return True
##语音识别
def audio2text(self, filename):
data = {}
data['format'] = 'wav'
data['rate'] = 8000
data['channel'] = 1
data['cuid'] = self.cu_id
data['token'] = self.token_str
wav_fp = open(filename, 'rb')
voice_data = wav_fp.read()
data['len'] = len(voice_data)
# data['speech'] = base64.b64encode(voice_data).decode('utf-8')
data['speech'] = base64.b64encode(voice_data).replace('\n', '')
# post_data = json.dumps(data)
result = requests.post(self.upvoice_url, json=data, headers={'Content-Type': 'application/json'})
data_result = result.json()
if(data_result['err_msg'] == 'success.'):
return data_result['result'][0]
else:
return False
def test_voice(voice_file):
api_key = "vossGHIgEETS6IMRxBDeahv8"
api_secert = "3c1fe6a6312f41fa21fa2c394dad5510"
bdr = BaiduRest("0-57-7B-9F-1F-A1", api_key, api_secert)
# 生成
#start = time.time()
#bdr.text2audio("你好啊", "out.wav")
#using = time.time() - start
#print using
# 识别
#start = time.time()
result = bdr.audio2text(voice_file)
# result = bdr.audio2text("weather.pcm")
#using = time.time() - start
return result
def get_master_audio(check_status='cut_status'):
if check_status == 'cut_status':
sql = "SELECT id,url, time_long,sharps FROM ocenter_recognition WHERE status=0"
elif check_status == 'finished_status':
sql = "SELECT id,url, time_long,sharps FROM ocenter_recognition WHERE finished_status=0"
else:
return False
data = rtysdb.select_data(sql,'more')
if data:
return data
else:
return False
def go_recognize(master_id):
section_path = db_config.SYS_PATH
sql = "SELECT id,rid,url,status FROM ocenter_section WHERE rid=%d AND status=0 order by id asc limit 10" % (master_id)
#print sql
record = rtysdb.select_data(sql,'more')
#print record
if not record:
return False
for rec in record:
#print section_path+'/'+rec[1]
voice_file = section_path+'/'+rec[2]
if not os.path.exists(voice_file):
continue
result = test_voice(voice_file)
print result
exit(0)
if result:
#rtysdb.update_by_pk('ocenter_section',rec[0],{'content':result,'status':1})
sql = "update ocenter_section set content='%s', status='%d' where id=%d" % (result,1,rec[0]) #print sql
rtysdb.do_exec_sql(sql)
parent_content = rtysdb.select_data("SELECT id,content FROM ocenter_recognition WHERE id=%d" % (rec[1]))
#print parent_content
if parent_content:
new_content = parent_content[1]+result
update_content_sql = "update ocenter_recognition set content='%s' where id=%d" % (new_content,rec[1])
rtysdb.do_exec_sql(update_content_sql)
else:
rtysdb.do_exec_sql("update ocenter_section set status='%d' where id=%d" % (result,1,rec[0]))
time.sleep(5)
else:
rtysdb.do_exec_sql("UPDATE ocenter_recognition SET finished_status=1 WHERE id=%d" % (master_id))
#对百度语音识别不了的音频文件进行转换
def ffmpeg_convert():
section_path = db_config.SYS_PATH
#print section_path
used_audio = get_master_audio('cut_status')
#print used_audio
if used_audio:
for audio in used_audio:
audio_path = section_path+'/'+audio[1]
new_audio = uuid.uuid1()
command_line = "ffmpeg -i "+audio_path +" -ar 8000 -ac 1 -f wav "+section_path+"/Uploads/Convert/convert_" + str(new_audio) +".wav";
#print command_line
os.popen(command_line)
if os.path.exists(section_path+"/Uploads/Convert/convert_" + str(new_audio) +".wav"):
convert_name = "Uploads/Convert/convert_" + str(new_audio) +".wav"
ffmpeg_cut(convert_name,audio[3],audio[0])
sql = "UPDATE ocenter_recognition SET status=1,convert_name='%s' where id=%d" % (convert_name,audio[0])
rtysdb.do_exec_sql(sql)
#将大音频文件切成碎片
def ffmpeg_cut(convert_name,sharps,master_id):
section_path = db_config.SYS_PATH
if sharps>0:
for i in range(0,sharps):
timeArray = time.localtime(i*30)
h = time.strftime("%H", timeArray)
h = int(h) - 8
h = "0" + str(h)
ms = time.strftime("%M:%S",timeArray)
start_time = h+':'+str(ms)
cut_name = section_path+'/'+convert_name
db_store_name = "Uploads/Section/"+str(uuid.uuid1())+'-'+str(i+1)+".wav"
section_name = section_path+"/"+db_store_name
command_line = "ffmpeg.exe -i "+cut_name+" -vn -acodec copy -ss "+start_time+" -t 00:00:30 "+section_name
#print command_line
os.popen(command_line)
data = {}
data['rid'] = master_id
data['url'] = db_store_name
data['create_time'] = int(time.time())
data['status'] = 0
rtysdb.insert_one('ocenter_section',data)
if __name__ == "__main__":
ffmpeg_convert()
audio = get_master_audio('finished_status')
if audio:
for ad in audio:
go_recognize(ad[0])
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
