执行google speech api示例代码时配置错误

Question

https://cloud.google.com/speech-to-text/docs/streaming-recognize

我一直在尝试执行“在音频流上执行流式语音识别”下的示例google语音API代码

以下是我一直在尝试执行的代码：

     'use strict';
  const record = require('node-record-lpcm16');
  const speech = require('@google-cloud/speech');
  const exec = require('child_process').exec;
  //const speech = Speech();
  const client = new speech.SpeechClient();

  const encoding = 'LINEAR16';
  const sampleRateHertz = 16000;
  const languageCode = 'en-US';

  const request = {
  config: {

    encoding: encoding,
    sampleRateHertz: sampleRateHertz,
    languageCode: languageCode

    },
    interimResults: true // If you want interim results, set this to true
  };

  const recognizeStream = client.streamingRecognize(request)
    .on('error', console.error)
    .on('data', (data) =>
        process.stdout.write(
          (data.results[0] && data.results[0].alternatives[0])
            ? `Transcription: ${data.results[0].alternatives[0].transcript}\n`
            : `\n\nReached transcription time limit, press Ctrl+C\n`)
      );

record.start({
  sampleRateHertz: sampleRateHertz,
  threshold: 0.5,
  verbose: true,
  recordProgram:  'arecord', // Try also "arecord" or "sox"
  silence: '10.0'

  }).on('error', console.error)
    .pipe(recognizeStream);



  console.log('Listening, press Ctrl+C to stop.');

终端输出： the output in the terminal:

我意识到来自arecord的输出流的编码存在问题，即它不符合程序中指定的配置，但我不知道该怎么做才能纠正这个