Google云语音同步"INVALID_ARGUMENT"

Question

我已经管理了"概述教程":https://cloud.google.com/speech/docs/getting-started 然后我尝试使用自己的音频文件.我上传了一个采样率为16000Hz的.flac文件.

我只更改了sync-request.json下面的文件,我自己的音频文件托管在谷歌云存储(gs://my-bucket/test4.flac)

{
  "config": {
      "encoding":"flac",
      "sample_rate": 16000
  },
  "audio": {
      "uri":"gs://my-bucket/test4.flac"
  }
}

该文件已被很好地识别,但请求返回"INVALID_ARGUMENT"错误

{
  "error": {
    "code": 400,
    "message": "Unable to recognize speech, code=-73541, possible error in recognition config. Please correct the config and retry the request.",
    "status": "INVALID_ARGUMENT"
  }
}

Answer 1

根据这个答案,所有编码仅支持1声道(单声道)音频

我用这个命令创建了FLAC文件:

ffmpeg -i test.mp3 test.flac

请求中的采样率与FLAC标头不匹配

但添加-ac 1(设置音频通道数为1)解决了这个问题.

ffmpeg -i test.mp3 -ac 1 test.flac

这是我的完整Node.js代码

const Speech = require('@google-cloud/speech');
const projectId = 'EnterProjectIdGeneratedByGoogle';

const speechClient = Speech({
    projectId: projectId
});

// The name of the audio file to transcribe
var fileName = '/home/user/Documents/test/test.flac';


// The audio file's encoding and sample rate
const options = {
    encoding: 'FLAC',
    sampleRate: 44100
};

// Detects speech in the audio file
speechClient.recognize(fileName, options)
    .then((results) => {
        const transcription = results[0];
        console.log(`Transcription: ${transcription}`);
    }, function(err) {
        console.log(err);
    });

采样率可以是16000或44100或其他有效值,编码可以是FLAC或LINEAR16.云语音文档