How to extract the values that return from the createRecognizeStream() method?

问题

Using Watson Speech to Text Services How to extract the values that return from the createRecognizeStream() method?

Here is a chunk of the sample code. I am trying to see in the terminal the interim results but all i get is this. How do I set the options for the results to appear?

{ results: [ { alternatives: [Object], final: false } ],
result_index: 0 }
{ results: [ { alternatives: [Object], final: false } ],
result_index: 0 }
{ results: [ { alternatives: [Object], final: false } ]...

they should look like this:

{
 "results": [
{
  "alternatives": [
    {
      "timestamps": [
        [
          "Here",
          0.08,
          0.63
        ],
        [
          "I",
          0.66,
          0.95
        ],
        [
          "Open",
          0.95,
          1.07
        ],
        [
          "a",
          1.07,
          1.33
        ],
        [
          "strong",
          1.33,
          1.95
        ],
        [
          "group",
          2.03,
          2.18
        ],
        [
          "of",
          2.18,
          2.72
        ],
        [

sample code:

  // create the stream
    var recognizeStream = speech_to_text.createRecognizeStream(params);

    // pipe in some audio
    fs.createReadStream(filepath).pipe(recognizeStream);;
    // and pipe out the transcription
    recognizeStream.pipe(fs.createWriteStream('transcriptions/transcription-' + path.basename(filepath) + '.txt'));

    // listen for 'data' events for just the final text
    // listen for 'results' events to get the raw JSON with interim results, timings, etc.
    recognizeStream.setEncoding('utf8');// to get strings instead of Buffers from `data` events
    ['data','results', 'error', 'connection-close'].forEach(function(eventName) {
    //JSON.stringify(eventName, null, 2)            
    //fs.writeFile('./transcript.txt', JSON.stringify(transcript), function(err) {if(err){return console.log('err')}});
        recognizeStream.on('results', console.log.bind(console, ''));
    });

回答1:

You need to stringify the JSON if you want a pretty, multiline JSON:

Instead of using console.log you should use:

JSON.stringify(value[, replacer[, space]])

Based on your example you will do:

var recognizeStream = speech_to_text.createRecognizeStream(params);

fs.createReadStream(filepath).pipe(recognizeStream);

recognizeStream.setEncoding('utf8');

// print interim results and final results
['data','results'].forEach(function(eventName) {
  recognizeStream.on(eventName, JSON.stringify.bind(JSON));
});

// print error and connection-close events
['error', 'connection-close'].forEach(function(eventName) {
  recognizeStream.on(eventName, console.log.bind(console, ''));
});

来源：https://stackoverflow.com/questions/35943698/how-to-extract-the-values-that-return-from-the-createrecognizestream-method

标签

node.js

ibm-cloud

speech-to-text

ibm-watson