vue实现PC端录音功能的实例代码

录音功能一般来说在移动端比较常见，但是在pc端也要实现按住说话的功能呢？项目需求：按住说话，时长不超过60秒，生成语音文件并上传，我这里用的是recorder.js

1.项目中新建一个recorder.js文件，内容如下，也可在百度上直接搜一个

// 兼容window.URL = window.URL || window.webkitURLnavigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedialet HZRecorder = function (stream, config) { config = config || {} config.sampleBits = config.sampleBits || 8 // 采样数位 8, 16 config.sampleRate = config.sampleRate || (44100 / 6) // 采样率(1/6 44100) let context = new (window.webkitAudioContext || window.AudioContext)() let audioInput = context.createMediaStreamSource(stream) let createScript = context.createScriptProcessor || context.createJavaScriptNode let recorder = createScript.apply(context, [4096, 1, 1]) let audioData = {  size: 0, // 录音文件长度  buffer: [], // 录音缓存  inputSampleRate: context.sampleRate, // 输入采样率  inputSampleBits: 16, // 输入采样数位 8, 16  outputSampleRate: config.sampleRate, // 输出采样率  oututSampleBits: config.sampleBits, // 输出采样数位 8, 16  input: function (data) {   this.buffer.push(new Float32Array(data))   this.size += data.length  },  compress: function () { // 合并压缩   // 合并   let data = new Float32Array(this.size)   let offset = 0   for (let i = 0; i < this.buffer.length; i++) {    data.set(this.buffer[i], offset)    offset += this.buffer[i].length   }   // 压缩   let compression = parseInt(this.inputSampleRate / this.outputSampleRate)   let length = data.length / compression   let result = new Float32Array(length)   let index = 0; let j = 0   while (index < length) {    result[index] = data[j]    j += compression    index++   }   return result  },  encodeWAV: function () {   let sampleRate = Math.min(this.inputSampleRate, this.outputSampleRate)   let sampleBits = Math.min(this.inputSampleBits, this.oututSampleBits)   let bytes = this.compress()   let dataLength = bytes.length * (sampleBits / 8)   let buffer = new ArrayBuffer(44 + dataLength)   let data = new DataView(buffer)   let channelCount = 1// 单声道   let offset = 0   let writeString = function (str) {    for (let i = 0; i < str.length; i++) {     data.setUint8(offset + i, str.charCodeAt(i))    }   }   // 资源交换文件标识符   writeString('RIFF'); offset += 4   // 下个地址开始到文件尾总字节数,即文件大小-8   data.setUint32(offset, 36 + dataLength, true); offset += 4   // WAV文件标志   writeString('WAVE'); offset += 4   // 波形格式标志   writeString('fmt '); offset += 4   // 过滤字节,一般为 0x10 = 16   data.setUint32(offset, 16, true); offset += 4   // 格式类别 (PCM形式采样数据)   data.setUint16(offset, 1, true); offset += 2   // 通道数   data.setUint16(offset, channelCount, true); offset += 2   // 采样率,每秒样本数,表示每个通道的播放速度   data.setUint32(offset, sampleRate, true); offset += 4   // 波形数据传输率 (每秒平均字节数) 单声道×每秒数据位数×每样本数据位/8   data.setUint32(offset, channelCount * sampleRate * (sampleBits / 8), true); offset += 4   // 快数据调整数 采样一次占用字节数 单声道×每样本的数据位数/8   data.setUint16(offset, channelCount * (sampleBits / 8), true); offset += 2   // 每样本数据位数   data.setUint16(offset, sampleBits, true); offset += 2   // 数据标识符   writeString('data'); offset += 4   // 采样数据总数,即数据总大小-44   data.setUint32(offset, dataLength, true); offset += 4   // 写入采样数据   if (sampleBits === 8) {    for (let i = 0; i < bytes.length; i++ , offset++) {     let s = Math.max(-1, Math.min(1, bytes[i]))     let val = s < 0 ? s * 0x8000 : s * 0x7FFF     val = parseInt(255 / (65535 / (val + 32768)))     data.setInt8(offset, val, true)    }   } else {    for (let i = 0; i < bytes.length; i++ , offset += 2) {     let s = Math.max(-1, Math.min(1, bytes[i]))     data.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true)    }   }   return new Blob([data], { type: 'audio/mp3' })  } } // 开始录音 this.start = function () {  audioInput.connect(recorder)  recorder.connect(context.destination) } // 停止 this.stop = function () {  recorder.disconnect() } // 获取音频文件 this.getBlob = function () {  this.stop()  return audioData.encodeWAV() } // 回放 this.play = function (audio) {  let downRec = document.getElementById('downloadRec')  downRec.href = window.URL.createObjectURL(this.getBlob())  downRec.download = new Date().toLocaleString() + '.mp3'  audio.src = window.URL.createObjectURL(this.getBlob()) } // 上传 this.upload = function (url, callback) {  let fd = new FormData()  fd.append('audioData', this.getBlob())  let xhr = new XMLHttpRequest()  /* eslint-disable */  if (callback) {   xhr.upload.addEventListener('progress', function (e) {    callback('uploading', e)   }, false)   xhr.addEventListener('load', function (e) {    callback('ok', e)   }, false)   xhr.addEventListener('error', function (e) {    callback('error', e)   }, false)   xhr.addEventListener('abort', function (e) {    callback('cancel', e)   }, false)  }  /* eslint-disable */  xhr.open('POST', url)  xhr.send(fd) } // 音频采集 recorder.onaudioprocess = function (e) {  audioData.input(e.inputBuffer.getChannelData(0))  // record(e.inputBuffer.getChannelData(0)); }}// 抛出异常HZRecorder.throwError = function (message) { alert(message) throw new function () { this.toString = function () { return message } }()}// 是否支持录音HZRecorder.canRecording = (navigator.getUserMedia != null)// 获取录音机HZRecorder.get = function (callback, config) { if (callback) {  if (navigator.getUserMedia) {   navigator.getUserMedia(    { audio: true } // 只启用音频    , function (stream) {     let rec = new HZRecorder(stream, config)     callback(rec)    }    , function (error) {     switch (error.code || error.name) {      case 'PERMISSION_DENIED':      case 'PermissionDeniedError':       HZRecorder.throwError('用户拒绝提供信息。')       break      case 'NOT_SUPPORTED_ERROR':      case 'NotSupportedError':       HZRecorder.throwError('浏览器不支持硬件设备。')       break      case 'MANDATORY_UNSATISFIED_ERROR':      case 'MandatoryUnsatisfiedError':       HZRecorder.throwError('无法发现指定的硬件设备。')       break      default:       HZRecorder.throwError('无法打开麦克风。异常信息:' + (error.code || error.name))       break     }    })  } else {   HZRecorder.throwErr('当前浏览器不支持录音功能。'); return  } }}export default HZRecorder