Question

node.js和Google云工具中的一名业余爱好者。我已采用此代码来尝试从Google Cloud存储桶中转录一段音频。当我在终端中运行node index.js时，我只得到 SyntaxError：await仅在异步函数中有效。我意识到这意味着我需要一个异步功能。但是，如何将整个文件转换为可以从终端成功运行的命令？

// Imports the Google Cloud client library
const speech = require('@google-cloud/speech');

// Creates a client
const client = new speech.SpeechClient();

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
const gcsUri = 'gs://anitomaudiofiles/911isnojoke.mp3';
const encoding = 'MP3';
const sampleRateHertz = 16000;
const languageCode = 'en-US';

const config = {
  encoding: encoding,
  sampleRateHertz: sampleRateHertz,
  languageCode: languageCode,
};

const audio = {
  uri: gcsUri,
};

const request = {
  config: config,
  audio: audio,
};

// Detects speech in the audio file. This creates a recognition job that you
// can wait for now, or get its result later.
const [operation] = await client.longRunningRecognize(request);
// Get a Promise representation of the final result of the job
const [response] = await operation.promise();
const transcription = response.results
  .map(result => result.alternatives[0].transcript)
  .join('\n');
console.log(`Transcription: ${transcription}`);

Answer 1

您不能在异步函数之外编写await operation.promise()。如果要使用await，则应在函数内部。

(async runOperations() {
  const [operation] = await client.longRunningRecognize(request);
  // Get a Promise representation of the final result of the job

  const [response] = await operation.promise();
  const transcription = response.results
      .map(result => result.alternatives[0].transcript)
      .join('\n');
  console.log(`Transcription: ${transcription}`);
})();

您可以将其放入文件中，然后运行node <filename.js>来运行它。

Answer 2

只需将其放在异步函数中即可

// earlier code here

async function main() {
  const [operation] = await client.longRunningRecognize(request);
  const [response] = await operation.promise();
  const transcription = response.results
    .map(result => result.alternatives[0].transcript)
    .join('\n');
  console.log(`Transcription: ${transcription}`);
}

main()

SyntaxError：await仅在Google Cloud Speech-to-Text中的异步功能中有效

2 个答案: