微信小程序和百度的语音识别接口详解

<button type='default' bindtouchstart='startrecorderHandel' bindtouchend="sendrecorderHandel">开始8录音</button>
<view>
 你说的话是:
 <view>
 {{msg}}
 </view>
</view>

// 录音对象
const recorderManager = wx.getRecorderManager();

function sendRecord(src) {
 var obj = {
 // 已经在花生壳中映射到本地端口-3001 
 url: "http://xxx:34306/post",
 filePath: src,
 name: "fffile",
 header: {
  'Content-Type': 'application/json'
 },
 success: function (result) {
  var data = JSON.parse(result.data);
  // msg 为最终语音识别的字符串
  var msg = data.result;
  // 获取当前页面对象
  var page = getCurrentPages()[0];
  page.setData({ msg: msg });
 },
 fail: function (err) {
  console.log(err);
 }
 };
 wx.uploadFile(obj)
}

// 结束录音的时候触发 
recorderManager.onStop((res) => {
 // 获取文件路径-提交到后台-后台发送到百度
 sendRecord(res.tempFilePath);
})

recorderManager.onError((res) => {
 console.log("error", res);
});

Page({

 /**
 * 页面的初始数据
 */
 data: {
 msg: ""
 },
 // 按下按钮的时候触发
 startrecorderHandel() {
 // 开始录音
 recorderManager.start({
 });
 },
 // 松开按钮的时候触发-发送录音
 sendrecorderHandel() {
 // 结束录音
 recorderManager.stop();
 },

 /**
 * 生命周期函数--监听页面加载
 */
 onLoad: function (options) {
 wx.authorize({
  scope: 'record'
 })
 }
})

var express = require('express');
var app = express();
var fs = require('fs');
var Multiparty = require('multiparty');
// 转码工具
var ffmpeg = require('fluent-ffmpeg');
var AipSpeechClient = require("baidu-aip-sdk").speech;

// #region 创建百度授权 
// 设置APPID/AK/SK
var APP_ID = "xxx";
var API_KEY = "xxx";
var SECRET_KEY = "xxx";

// 百度请求对象
var client = new AipSpeechClient(APP_ID, API_KEY, SECRET_KEY);


// 新建一个对象，建议只保存一个对象调用服务接口
app.post('/post', function (req, res, next) {
 //生成multiparty对象，并配置上传目标路径
 var form = new Multiparty.Form({
 uploadDir: 'uploads/'
 });
 //上传完成后处理
 form.parse(req, function (err, fields, files) {
 var filesTemp = JSON.stringify(files, null, 2);
 var inputFile = files.fffile[0];
 var uploadedPath = inputFile.path;
 var command = ffmpeg();
 command.addInput(uploadedPath)
  // 将1.aac 变为1.wav
  .save(uploadedPath.slice(0, -3) + "wav")
  .on('error', function (err) {
  console.log(err);
  })
  .on('end', function () {
  // 将录音文件转为buffer
  var voice = fs.readFileSync(uploadedPath.slice(0, -3) + "wav");
  var voiceBuffer = new Buffer(voice);

  // 发送buffer到百度接口 返回语音对应的字符串
  client.recognize(voiceBuffer, 'wav', 16000).then(function (result) {
   console.log('<recognize>: ' + JSON.stringify(result));
   res.end(JSON.stringify(result));
  }, function (err) {
   console.log(err);
  });
  });
 });
});
var server = app.listen(3001, function () {
 var host = server.address().address;
 var port = server.address().port;
 console.log('Example app listening at http://%s:%s', host, port);
});

git clone https://github.com/itcastWsy/wx_baidu.git