我尝试使用node.js服务器上的websocket连接从二进制数据创建WAV。我使用BluemixTTS创建语音。这是我目前的代码:
'use strict';
const WebSocket = require('ws');
var express = require('express');
var watson = require('watson-developer-cloud');
var vcapServices = require('vcap_services');
var extend = (extend = require('util')._extend);
var fs = require('fs');
var ttsConfig = extend(
{
version: 'v1',
url: 'https://stream.watsonplatform.net/text-to-speech/api',
username: 'myusernamehere',
password: "mypasswordhere"
},
vcapServices.getCredentials('text_to_speech')
);
var ttsAuthService = watson.authorization(ttsConfig);
var websocket;
ttsAuthService.getToken({ url: ttsConfig.url }, function(err, token) {
if (err) {
console.log('Error retrieving token: ', err);
return;
}
var voice = 'en-US_AllisonVoice';
var wsURI = 'wss://stream.watsonplatform.net/text-to-speech/api/v1/synthesize?voice=' +
voice + '&watson-token=' + token;
websocket = new WebSocket(wsURI);
websocket.onopen = function(evt) { onOpen(evt) };
websocket.onclose = function(evt) { onClose(evt) };
websocket.onmessage = function(evt) { onMessage(evt) };
websocket.onerror = function(evt) { onError(evt) };
});
function onOpen(evt) {
var message = {
text: 'Hello world',
accept: 'audio/wav',
timings: ['words']
};
websocket.send(JSON.stringify(message));
}
var messages;
var audioStream = null;
function onMessage(evt) {
if (typeof evt.data === 'string') {
messages += evt.data;
} else {
if(audioStream == null){
audioStream = evt.data;
}else{
audioStream += evt.data;
}
}
}
function onClose(evt) {
console.log(messages);
var wstream = fs.createWriteStream('test.wav');
wstream.write((audioStream));
wstream.end();
}
function onError(evt) {
}
我获取令牌,触发指定audio / wav的TTS,在onMessage方法中构建我的缓冲区,然后将其写入.wav文件。一切似乎都很好。
然而,该文件以某种方式被破坏,并且无法使用任何音乐播放器打开。我是否会错过一些特殊的编码?
感谢任何帮助 问候, Rambazamba
答案 0 :(得分:0)
由于数据包含缓冲区,每次收到消息时都必须直接在文件中写入缓冲区,然后在onClose事件中关闭文件流。像这样:
var messages;
var wstream = fs.createWriteStream('test.wav');
function onMessage(evt) {
if (typeof evt.data === 'string') {
messages += evt.data;
} else {
wstream.write(evt.data)
}
}
function onClose(evt) {
console.log(messages);
wstream.end();
}
function onError(evt) {
}