訊飛webapi語音識(shí)別接口調(diào)用示例代碼(python)

更新時(shí)間：2025年03月15日 09:18:33 作者：kh_yx

這篇文章主要介紹了如何使用Python3調(diào)用訊飛WebAPI語音識(shí)別接口,重點(diǎn)解決了在處理語音識(shí)別結(jié)果時(shí)判斷是否為最后一幀的問題,通過運(yùn)行代碼并總結(jié)經(jīng)驗(yàn),解決了常見的模塊和屬性錯(cuò)誤,需要的朋友可以參考下

前言

基于python3 訊飛webAPI語音識(shí)別接口調(diào)用的實(shí)現(xiàn)。

一、環(huán)境

1、注冊訊飛平臺(tái)賬號：訊飛平臺(tái)網(wǎng)址

2、進(jìn)入控制臺(tái)并創(chuàng)建應(yīng)用

3、進(jìn)入應(yīng)用后點(diǎn)擊右側(cè)語音識(shí)別-語音聽寫，系統(tǒng)會(huì)生成服務(wù)端口認(rèn)證信息APPID、APISecret、APIKey，后面調(diào)用接口的時(shí)候會(huì)用到，往下滑動(dòng)可看到接口地址

二、引入庫

需要提前安裝所需的庫

使用pip安裝

python -m pip install websocket-client

import websocket
import datetime
import hashlib
import base64
import hmac
import json
from urllib.parse import urlencode
import time
import ssl
from wsgiref.handlers import format_date_time
from datetime import datetime
from time import mktime
import _thread as thread

三、代碼實(shí)例

1、進(jìn)入訊飛資料文檔中心：語音聽寫（流式版）WebAPI 文檔 | 訊飛開放平臺(tái)文檔中心

下載python3 demo

demo中的on_message方法需要小小的改動(dòng)，在輸出完整的數(shù)據(jù)之前先進(jìn)行判斷是否已經(jīng)是最后一幀了。已在下面的代碼中體現(xiàn)

下列代碼中的APPID、APISecret、APIKey、url根據(jù)標(biāo)題一中3步驟的內(nèi)容更改

import websocket
import datetime
import hashlib
import base64
import hmac
import json
from urllib.parse import urlencode
import time
import ssl
from wsgiref.handlers import format_date_time
from datetime import datetime
from time import mktime
import _thread as thread

STATUS_FIRST_FRAME = 0  # 第一幀的標(biāo)識(shí)
STATUS_CONTINUE_FRAME = 1  # 中間幀標(biāo)識(shí)
STATUS_LAST_FRAME = 2  # 最后一幀的標(biāo)識(shí)


class Ws_Param(object):
    # 初始化
    def __init__(self, APPID, APIKey, APISecret, AudioFile):
        self.APPID = APPID
        self.APIKey = APIKey
        self.APISecret = APISecret
        self.AudioFile = AudioFile

        # 公共參數(shù)(common)
        self.CommonArgs = {"app_id": self.APPID}
        # 業(yè)務(wù)參數(shù)(business)，更多個(gè)性化參數(shù)可在官網(wǎng)查看
        self.BusinessArgs = {"domain": "iat", "language": "zh_cn", "accent": "mandarin", "vinfo":1,"vad_eos":10000}

    # 生成url
    def create_url(self):
        url = 'wss://ws-api.xfyun.cn/v2/iat'
        # 生成RFC1123格式的時(shí)間戳
        now = datetime.now()
        date = format_date_time(mktime(now.timetuple()))

        # 拼接字符串
        signature_origin = "host: " + "ws-api.xfyun.cn" + "\n"
        signature_origin += "date: " + date + "\n"
        signature_origin += "GET " + "/v2/iat " + "HTTP/1.1"
        # 進(jìn)行hmac-sha256進(jìn)行加密
        signature_sha = hmac.new(self.APISecret.encode('utf-8'), signature_origin.encode('utf-8'),
                                 digestmod=hashlib.sha256).digest()
        signature_sha = base64.b64encode(signature_sha).decode(encoding='utf-8')

        authorization_origin = "api_key=\"%s\", algorithm=\"%s\", headers=\"%s\", signature=\"%s\"" % (
            self.APIKey, "hmac-sha256", "host date request-line", signature_sha)
        authorization = base64.b64encode(authorization_origin.encode('utf-8')).decode(encoding='utf-8')
        # 將請求的鑒權(quán)參數(shù)組合為字典
        v = {
            "authorization": authorization,
            "date": date,
            "host": "ws-api.xfyun.cn"
        }
        # 拼接鑒權(quán)參數(shù)，生成url
        url = url + '?' + urlencode(v)
        # print("date: ",date)
        # print("v: ",v)
        # 此處打印出建立連接時(shí)候的url,參考本demo的時(shí)候可取消上方打印的注釋，比對相同參數(shù)時(shí)生成的url與自己代碼生成的url是否一致
        # print('websocket url :', url)
        return url


# 收到websocket消息的處理
all_results = "" 
def on_message(ws, message):
    global all_results   
    try:
        code = json.loads(message)["code"]
        sid = json.loads(message)["sid"]
        if code != 0:
            errMsg = json.loads(message)["message"]
            print("sid:%s call error:%s code is:%s" % (sid, errMsg, code))

        else:
            data = json.loads(message)["data"]["result"]["ws"]
            # print(json.loads(message))
            result = ""
            for i in data:
                tm = str(i["bg"])
                for w in i["cw"]:
                    result += w["w"]
            # 添加到全局結(jié)果
            all_results += result

            # 檢查是否為最后一幀
            if "status" in json.loads(message)["data"]:
                if json.loads(message)["data"]["status"] == 2:  # 判斷是否為最后一幀
                    print("sid:%s call success!, combined data is: %s" % (sid, all_results))  # 添加句號到最后
                    all_results = ""  # 清空全局結(jié)果
            #print("sid:%s call success!,data is:%s" % (sid, json.dumps(data, ensure_ascii=False)))
            #print("sid:%s call success!,data is:%s" % (sid, result))
    except Exception as e:
        print("receive msg,but parse exception:", e)



# 收到websocket錯(cuò)誤的處理
def on_error(ws, error):
    print("### error:", error)


# 收到websocket關(guān)閉的處理
def on_close(ws,a,b):
    print("### closed ###")


# 收到websocket連接建立的處理
def on_open(ws):
    def run(*args):
        frameSize = 8000  # 每一幀的音頻大小
        intervel = 0.04  # 發(fā)送音頻間隔(單位:s)
        status = STATUS_FIRST_FRAME  # 音頻的狀態(tài)信息，標(biāo)識(shí)音頻是第一幀，還是中間幀、最后一幀

        with open(wsParam.AudioFile, "rb") as fp:
            while True:
                buf = fp.read(frameSize)
                # 文件結(jié)束
                if not buf:
                    status = STATUS_LAST_FRAME
                # 第一幀處理
                # 發(fā)送第一幀音頻，帶business 參數(shù)
                # appid 必須帶上，只需第一幀發(fā)送
                if status == STATUS_FIRST_FRAME:

                    d = {"common": wsParam.CommonArgs,
                         "business": wsParam.BusinessArgs,
                         "data": {"status": 0, "format": "audio/L16;rate=16000",
                                  "audio": str(base64.b64encode(buf), 'utf-8'),
                                  "encoding": "raw"}}
                    d = json.dumps(d)
                    ws.send(d)
                    status = STATUS_CONTINUE_FRAME
                # 中間幀處理
                elif status == STATUS_CONTINUE_FRAME:
                    d = {"data": {"status": 1, "format": "audio/L16;rate=16000",
                                  "audio": str(base64.b64encode(buf), 'utf-8'),
                                  "encoding": "raw"}}
                    ws.send(json.dumps(d))
                # 最后一幀處理
                elif status == STATUS_LAST_FRAME:
                    d = {"data": {"status": 2, "format": "audio/L16;rate=16000",
                                  "audio": str(base64.b64encode(buf), 'utf-8'),
                                  "encoding": "raw"}}
                    ws.send(json.dumps(d))
                    time.sleep(1)
                    break
                # 模擬音頻采樣間隔
                time.sleep(intervel)
        ws.close()

    thread.start_new_thread(run, ())


if __name__ == "__main__":
    # 測試時(shí)候在此處正確填寫相關(guān)信息即可運(yùn)行
    time1 = datetime.now()
    wsParam = Ws_Param(APPID='xxx', APISecret='xxx',
                       APIKey='xxx',
                       AudioFile=r'C:\Users\1\Downloads\iat_pcm_8k.pcm')
    websocket.enableTrace(False)
    wsUrl = wsParam.create_url()
    ws = websocket.WebSocketApp(wsUrl, on_message=on_message, on_error=on_error, on_close=on_close)
    ws.on_open = on_open
    ws.run_forever(sslopt={"cert_reqs": ssl.CERT_NONE})
    time2 = datetime.now()
    print(time2-time1)

四、運(yùn)行結(jié)果

五、總結(jié)

ModuleNotFoundError: No module named 'websocket'

AttributeError: module 'websocket' has no attribute 'enableTrace'

以上錯(cuò)誤需要安裝websocket-client庫即可解決

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