Watson IBM speech to text: no interim_result (Node.JS)

Question

我正试图获得interim_results与node.js

var params = {
audio: fs.createReadStream('./out.wav'),
content_type: 'audio/l16;rate=16000',
continuous: true,
interim_results: true,
word_confidence: true
};

我用speech_to_text.createSession创建会话，然后我尝试启动recognize功能:

function recognize(params,session_id,cookie_session) {
setInterval(function(){ observe_results(session_id,cookie_session) }, 1000);
speech_to_text.recognize(params, function(err, transcript) {
    if (err) {
        console.log(err);
    }
    else {
        console.log("OK")
        console.log(JSON.stringify(transcript, null, 2));
        fs.writeFile('./transcript.txt', JSON.stringify(transcript), function(err) {if(err){return console.log('err')}});
    }
});}

，但我只收到最后的转录，而不是interim_results。提前感谢您的帮助。

Answer 1

UPDATE: 11/4:从v1.0开始，watson-developer-cloud npm模块支持websockets。

参见:如何在node.js中创建一个blob以用于websocket?

---

原始回答:
您正在呼叫recognize而不是recognizeLive。

请看下面的例子:

var watson = require('watson-developer-cloud'),
  fs = require('fs');
var speechToText = watson.speech_to_text({
 password: '<password>',
 username: '<username>',
 version: 'v1'
});
var noop = function(){};
var observeResult = function(err, transcript) {
  if (err){
    console.log(err);
    return;
  }
  // print the transcript
  console.log(JSON.stringify(transcript, null, 2));
};
speechToText.createSession({}, function(err, session){
  if (err){
    console.log('error:', err);
    return;
  }
  var request = speechToText.recognizeLive({
    content_type: 'audio/l16;rate=44100',
    continuous: true,
    word_confidence: true,
    interim_results: true,
    session_id: session.session_id,
    cookie_session: session.cookie_session }, noop);
  // call observe result to get intermin results
  speechToText.observeResult({
    interim_results: true,
    session_id: session.session_id,
    cookie_session: session.cookie_session }, observeResult);
  // pipe the audio to the request
  // once the stream is consumed it will call request.end()
  fs.createReadStream('audio.wav').pipe(request);
});

替换username和password，使用此音频

我写了一个列表供将来参考。它还包含使用上面的音频时的输出。