将.m4a转换为.wav [英] Convert .m4a to .wav
本文介绍了将.m4a转换为.wav的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我需要将缓冲音频文件.m4a转换为缓冲音频文件.wav,以通过NodeJS发送给Google语音api
I need to convert buffer audio file .m4a to buffer audio file .wav for send to google speech api by NodeJS
var toWav = require('audiobuffer-to-wav')
var xhr = require('xhr')
var context = new AudioContext()
// request the MP3 as binary
xhr({
uri: 'audio/track.mp3',
responseType: 'arraybuffer'
}, function (err, body, resp) {
if (err) throw err
// decode the MP3 into an AudioBuffer
audioContext.decodeAudioData(resp, function (buffer) {
// encode AudioBuffer to WAV
var wav = toWav(buffer)
// do something with the WAV ArrayBuffer ...
})
})
我遇到错误
AudioContext is not defined
推荐答案
使用ffmpeg
(要在Mac 上安装ffmpeg,只需稍作安装ffmpeg
)
var ffmpeg = require('fluent-ffmpeg');
function convertFileFormat(file, destination, error, progressing, finish) {
ffmpeg(file)
.on('error', (err) => {
console.log('An error occurred: ' + err.message);
if (error) {
error(err.message);
}
})
.on('progress', (progress) => {
// console.log(JSON.stringify(progress));
console.log('Processing: ' + progress.targetSize + ' KB converted');
if (progressing) {
progressing(progress.targetSize);
}
})
.on('end', () => {
console.log('converting format finished !');
if (finish) {
finish();
}
})
.save(destination);
}
convertFileFormat('file.m4a', 'file.wav', function (errorMessage) {
}, null, function () {
console.log("success");
});
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