JS实现录音，播放完整代码带示例图

效果图：

实现代码：

引入的 recorder.js 的代码：

/*!
 * 
 * js-audio-recorder - js audio recorder plugin
 * 
 * @version v1.0.3
 * @homepage https://github.com/2fps/recorder
 * @author 2fps  (https://www.zhuyuntao.cn)
 * @license MIT
 *         
 */
!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.Recorder=e():t.Recorder=e()}(this,function(){return function(t){var e={};function n(i){if(e[i])return e[i].exports;var o=e[i]={i:i,l:!1,exports:{}};return t[i].call(o.exports,o,o.exports,n),o.l=!0,o.exports}return n.m=t,n.c=e,n.d=function(t,e,i){n.o(t,e)||Object.defineProperty(t,e,{enumerable:!0,get:i})},n.r=function(t){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(t,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(t,"__esModule",{value:!0})},n.t=function(t,e){if(1&e&&(t=n(t)),8&e)return t;if(4&e&&"object"==typeof t&&t&&t.__esModule)return t;var i=Object.create(null);if(n.r(i),Object.defineProperty(i,"default",{enumerable:!0,value:t}),2&e&&"string"!=typeof t)for(var o in t)n.d(i,o,function(e){return t[e]}.bind(null,o));return i},n.n=function(t){var e=t&&t.__esModule?function(){return t.default}:function(){return t};return n.d(e,"a",e),e},n.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},n.p="",n(n.s=1)}([function(t,e,n){"use strict";function i(t,e,n){for(var i=0;ie?e:n,u=r,c=new ArrayBuffer(44+t.byteLength),l=new DataView(c),f=o,p=0;i(l,p,"RIFF"),p+=4,l.setUint32(p,36+t.byteLength,a),i(l,p+=4,"WAVE"),i(l,p+=4,"fmt "),p+=4,l.setUint32(p,16,a),p+=4,l.setUint16(p,1,a),p+=2,l.setUint16(p,f,a),p+=2,l.setUint32(p,s,a),p+=4,l.setUint32(p,f*s*(u/8),a),p+=4,l.setUint16(p,f*(u/8),a),p+=2,l.setUint16(p,u,a),i(l,p+=2,"data"),p+=4,l.setUint32(p,t.byteLength,a),p+=4;for(var d=0;d44&&s.default.play(t.buffer)},e.prototype.getPlayTime=function(){return s.default.getPlayTime()},e.prototype.pausePlay=function(){!this.isrecording&&this.isplaying&&(this.isplaying=!1,this.onpauseplay(),s.default.pausePlay())},e.prototype.resumePlay=function(){this.isrecording||this.isplaying||(this.isplaying=!0,this.onresumeplay&&this.onresumeplay(),s.default.resumePlay())},e.prototype.stopPlay=function(){this.isrecording||(this.isplaying=!1,this.onstopplay(),s.default.stopPlay())},e.prototype.destroy=function(){return s.default.destroyPlay(),this.destroyRecord()},e.prototype.getRecordAnalyseData=function(){return this.getAnalyseData()},e.prototype.getPlayAnalyseData=function(){return s.default.getAnalyseData()},e.prototype.getPCM=function(){this.stop();var t=this.getData();return t=a.compress(t,this.inputSampleRate,this.outputSampleRate),a.encodePCM(t,this.oututSampleBits,this.littleEdian)},e.prototype.getPCMBlob=function(){return new Blob([this.getPCM()])},e.prototype.downloadPCM=function(t){void 0===t&&(t="recorder");var e=this.getPCMBlob();r.downloadPCM(e,t)},e.prototype.getWAV=function(){var t=this.getPCM();return a.encodeWAV(t,this.inputSampleRate,this.outputSampleRate,this.config.numChannels,this.oututSampleBits,this.littleEdian)},e.prototype.getWAVBlob=function(){return new Blob([this.getWAV()],{type:"audio/wav"})},e.prototype.downloadWAV=function(t){void 0===t&&(t="recorder");var e=this.getWAVBlob();r.downloadWAV(e,t)},e}(n(5).default);e.default=u},function(t,e,n){"use strict";function i(t,e,n){var i=document.createElement("a");i.href=window.URL.createObjectURL(t),i.download=e+"."+n,i.click()}Object.defineProperty(e,"__esModule",{value:!0}),e.downloadWAV=function(t,e){void 0===e&&(e="recorder"),i(t,e,"wav")},e.downloadPCM=function(t,e){void 0===e&&(e="recorder"),i(t,e,"pcm")}},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var i=n(4),o=null,r=0,a=0,s=null,u=null,c=null,l=!1,f=0,p=function(){};function d(){return l=!1,s.decodeAudioData(c.slice(0),function(t){(o=s.createBufferSource()).onended=function(){l||(f=s.currentTime-a+r,p())},o.buffer=t,o.connect(u),u.connect(s.destination),o.start(0,r),a=s.currentTime},function(t){i.throwError(t)})}function h(){o&&(o.stop(),o=null)}var y=function(){function t(){}return t.play=function(t){return s||(s=new(window.AudioContext||window.webkitAudioContext),(u=s.createAnalyser()).fftSize=2048),this.stopPlay(),c=t,f=0,d()},t.pausePlay=function(){h(),r+=s.currentTime-a,l=!0},t.resumePlay=function(){return d()},t.stopPlay=function(){r=0,c=null,h()},t.destroyPlay=function(){this.stopPlay()},t.getAnalyseData=function(){var t=new Uint8Array(u.frequencyBinCount);return u.getByteTimeDomainData(t),t},t.addPlayEnd=function(t){void 0===t&&(t=function(){}),p=t},t.getPlayTime=function(){var t=l?r:s.currentTime-a+r;return f||t},t}();e.default=y},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0}),e.throwError=function(t){throw new Error(t)}},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var i=n(0),o=function(){function t(e){void 0===e&&(e={}),this.size=0,this.lBuffer=[],this.rBuffer=[],this.tempPCM=[],this.inputSampleBits=16,this.fileSize=0,this.duration=0,this.needRecord=!0;var n,i=new(window.AudioContext||window.webkitAudioContext);this.inputSampleRate=i.sampleRate,this.setNewOption(e),this.littleEdian=(n=new ArrayBuffer(2),new DataView(n).setInt16(0,256,!0),256===new Int16Array(n)[0]),t.initUserMedia()}return t.prototype.setNewOption=function(t){void 0===t&&(t={}),this.config={sampleBits:~[8,16].indexOf(t.sampleBits)?t.sampleBits:16,sampleRate:~[11025,16e3,22050,24e3,44100,48e3].indexOf(t.sampleRate)?t.sampleRate:this.inputSampleRate,numChannels:~[1,2].indexOf(t.numChannels)?t.numChannels:1},this.outputSampleRate=this.config.sampleRate,this.oututSampleBits=this.config.sampleBits},t.prototype.startRecord=function(){var t=this;return this.context&&this.destroyRecord(),this.initRecorder(),navigator.mediaDevices.getUserMedia({audio:!0}).then(function(e){t.audioInput=t.context.createMediaStreamSource(e),t.stream=e}).then(function(){t.audioInput.connect(t.analyser),t.analyser.connect(t.recorder),t.recorder.connect(t.context.destination)})},t.prototype.pauseRecord=function(){this.needRecord=!1},t.prototype.resumeRecord=function(){this.needRecord=!0},t.prototype.stopRecord=function(){this.audioInput&&this.audioInput.disconnect(),this.source&&this.source.stop(),this.recorder.disconnect(),this.analyser.disconnect()},t.prototype.destroyRecord=function(){return this.clearRecordStatus(),this.stopStream(),this.closeAudioContext()},t.prototype.getAnalyseData=function(){var t=new Uint8Array(this.analyser.frequencyBinCount);return this.analyser.getByteTimeDomainData(t),t},t.prototype.getData=function(){return this.flat()},t.prototype.clearRecordStatus=function(){this.lBuffer.length=0,this.rBuffer.length=0,this.size=0,this.fileSize=0,this.PCM=null,this.audioInput=null,this.duration=0},t.prototype.flat=function(){var t=null,e=new Float32Array(0);1===this.config.numChannels?t=new Float32Array(this.size):(t=new Float32Array(this.size/2),e=new Float32Array(this.size/2));for(var n=0,i=0;i

 

recorder说明：

使用方式 script方式

直接引入recorder.js即可

let recorder = new Recorder();

npm方式

安装：

npm i js-audio-recorder

调用：

import Recorder from 'js-audio-recorder';

let recorder = new Recorder();

API 基本方法

// 开始录音
recorder.start();
// 暂停录音
recorder.pause();
// 继续录音
recorder.resume()
// 结束录音
recorder.stop();
// 录音播放
recorder.play();
// 销毁录音实例，释放资源，fn为回调函数，
recorder.destroy(fn);
recorder = null;

下载功能

// 下载pcm文件
recorder.downloadPCM();
// 下载wav文件
recorder.downloadWAV();
// 重命名pcm文件，wav也支持
recorder.downloadPCM('重命名');

获取录音时长

// 回调持续输出时长
recorder.onprocess = function(duration) {
    console.log(duration);
}
// 手动获取录音时长
console.log(recorder.duration);

默认配置

sampleBits，采样位数，默认是16
sampleRate，采样频率，浏览器默认的，我的chrome是48000
numChannels，声道数，默认是1

传入参数

new Recorder时支持传入参数，

{
    sampleBits: 16,         // 采样位数，范围8或16
    sampleRate: 16000,      // 采样率，范围11025、16000、22050、24000、44100、48000
    numChannels: 1,         // 声道，范围1或2
}

注意

使用127.0.0.1或localhost尝试，因为getUserMedia在高版本的chrome下需要使用https。