wx-voice

Convert audio files between Tencent apps (Weixin / Wechat, QQ) and Silk codec with other general formats such as MP3 and M4A
中文版

Install

$ npm install wx-voice --save
$ npm install wx-voice -g
$ wx-voice compile

Prerequisites

Ffmpeg: Installing ffmpeg
Build tools: Installing build tools

Usage

// Initialize
const WxVoice = require('wx-voice');
var voice = new WxVoice();

// Error handler
voice.on("error", (err) => console.log(err));

// Decode silk to MP3
voice.decode(
    "input.silk", "output.mp3", { format: "mp3" },
    (file) => console.log(file));

// Output: "/path/to/output.mp3"

API

new WxVoice([tempFolder, [ffmpegPath]])

Initialize wxVoice object

Parameter	Description
tempFolder	Folder of temporary files, default to system temporary
ffmpegPath	Custom path to ffmpeg executables, default using `$PATH`

decode(input, output, [options, [callback]])

Decode the audio to general formats

encode(input, output, [options, [callback]])

Encode the audio to silk/webm format

Parameter	Description
input	Input audio path
output	Output audio path
options	Javascript object format: format to be encoded/decoded (silk, webm, mp3, m4a...), if not specified will parse from output
callback	Callback with `output` as parameter when decode success, `undefined` otherwise

voice.encode(
    "input.mp3", "output.silk", { format: "silk" },
    (file) => console.log(file));

// Output: "/path/to/output.silk"

duration(filePath, [callback])

Get the duration of the audio file
(Decode to general audio format before calling this method)

Parameter	Description
filePath	File path to the audio
callback	Callback with duration of the audio in second as parameter when decode success, `0` otherwise

voice.encode("output.mp3", (dur) => console.log(dur));
// Output: "10.290"

Tests

Tested on silk, webm, mp3, m4a, wav

Todo

Use options as parameter instead of multiple arguments
Timeout to stop the convert process if it takes too long
Batch conversion using command line
Support Windows

Installing build tools

OS	Command
Ubuntu	`sudo apt-get install build-essential`
CentOS	`sudo yum groupinstall 'Development Tools'`
Mac	Download XCode

Installing ffmpeg

Ubuntu

$ sudo add-apt-repository ppa:mc3man/trusty-media  
$ sudo apt-get update  
$ sudo apt-get install ffmpeg

CentOS

$ sudo yum install epel-release
$ sudo yum update
$ sudo rpm --import http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro

For CentOS 7:

$ sudo rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm

For CentOS 6:

$ sudo rpm -Uvh http://li.nux.ro/download/nux/dextop/el6/x86_64/nux-dextop-release-0-2.el6.nux.noarch.rpm

Install FFMPEG:

$ sudo yum install ffmpeg

Mac

$ brew install ffmpeg

jlala/wx-voice