如何使用从浏览器发送到 Nodejs 服务器的 Blob Google 语音转文本

How to Google Speech-to-Text using Blob sent from Browser to Nodejs Server

我正在尝试设置服务器以使用 SocketIO 从客户端浏览器接收音频,然后通过 Google Speech-to-Text 处理它,最后回复给客户端正文。

最初和理想情况下,我想设置其功能有点像此页面上的工具:https://cloud.google.com/speech-to-text/

我尝试使用 getUserMedia 并通过 SocketIO-Stream 进行流式传输,但我不知道如何 'pipe' MediaStream

相反,现在我决定在客户端使用 MediaRecorder,然后将数据作为 blob 一起发送(见 example)。

然后我将 toString('base64') 应用到 blob 并在 blob 上调用 google-cloud/speech 的 client.recognize()

客户端(我正在使用 VueJS):

        new Vue({
            el: '#app',
            data: function () {
                return ({
                    msgs: [],
                    socket: null,
                    recorder: null,
                    : []
                })
            },
            mounted: function () {
                this.socket = io.connect('localhost:3000/user');
                console.log('Connected!')
                this.socket.on('text', function (text) {
                    this.msgs.push(text)
                })
            },
            methods: {
                startRecording: function () {
                    if (this.recorder && this.recorder.state == 'recording') {
                        console.log("Stopping!")
                        this.recorder.stop()
                    } else {
                        console.log("Starting!")
                        navigator.mediaDevices.getUserMedia({ audio: true, video: false })
                            .then(this.handleSuccess);
                    }
                },
                handleSuccess: function (stream) {
                    this.recorder = new MediaRecorder(stream)
                    this.recorder.start(10000)
                    this.recorder.ondataavailable = (e) => {
                        this.chunks.push(e.data)
                        console.log(e.data)
                    }
                    this.recorder.onstop = (e) => {
                        const blob = new Blob(this.chunks, { 'type': 'audio/webm; codecs=opus' })
                        this.socket.emit('audio', blob)
                    }
                }
            }
        })

服务器端:

const speech = require('@google-cloud/speech');
const client = new speech.SpeechClient();

const io = require('socket.io').listen(3000)
const ss = require('socket.io-stream')

const encoding = 'LINEAR16';
const sampleRateHertz = 16000;
const languageCode = 'en-US';

const audio = {
    content: null
}

const config = {
    encoding: encoding,
    sampleRateHertz: sampleRateHertz,
    languageCode: languageCode,
}

async function main() {
    const [response] = await client.recognize({
        audio: audio,
        config: config
    })
    const transcription = response.results
        .map(result => result.alternatives[0].transcript)
        .join('\n');
    console.log(`Transcription: ${transcription}`);
}

io.of('/user').on('connection', function (socket) {
    console.log('Connection made!')
    socket.on('audio', function (data) {
        audio.content = data.toString('base64')
        main().catch(console.error)
    });
});




服务器端main()函数的日志总是:

"Transcription: "

-- 这是空的!

它应该包含发送的音频中的文本。 提前致谢!

您的 nodejs 应用程序要求处理原始音频数据,记录为 16 位有符号整数数组 ('LINEAR16'),速率为 16k samples/sec (16000 ) 。这种音频表示形式被称为 pulse-code modulation (PCM),原因在古代电话知识中已丢失。

但是您从 client-side 代码发送的 Blob 不是那个。它是一个带有 content-type audio/webm; codecs=opus 的媒体对象。这意味着音轨是使用 Opus codec and boxed (multiplexed) in the webm (Matroska, ebml) container format 压缩的。云 text-to-speech 代码试图将其解释为原始音频数据,但失败了,它举起双手 returns 一个空的转录字符串。这类似于尝试在文本编辑器中查看 zip 文件:它只是乱码。

要text-to-speech使用媒体对象,您必须先从中提取 PCM 音频。在服务器上设置是一个众所周知的难题;你必须使用 ffmpeg。有一个tutorial on it in the text-to-speech documentation。本教程提到从视频文件中抓取音频。你的 Blob 基本上是一个没有视频轨道的视频文件,所以同样的技术也可以工作。

但是,您最好还是回到第一种方法,使用 MediaStream browser javascript APIs. In particular, your browser code should use elements of the Web Audio API 拦截原始 PCM 音频数据并将其发送到您的服务器或直接从浏览器发送到 text-to-speech.

解释所有这些超出了 Whosebug 答案的范围。这里有一些提示。 How to use web audio api to get raw pcm audio?

Google Text-To-Speech v1p1beta1 API 端点现在支持 MP3 文件。正如 O.Jones 所说,上面的 MediaRecorder API 是一个不错的选择,但现在你只能获取 MP3 而不是原始 PCM 数据,我发现很难实现 RecordRTC 库以获取原始 PCM,因为我运行 进入音质和跨浏览器问题。

我的解决方案: 我在创建我的 blob 时使用了 mimeType audio/mp3const blob = new Blob(chunks, { 'type' : 'audio/mp3' }); 然后我将 blob 转换为 base64 字符串 like in this SO example。然后,当您向 Google 的 Speech-To-Text api 发送 api 调用时,您必须指定 v1p1beta1 beta 端点,并将配置设置为我已经在下面的 cURL 请求中完成了。请注意,MediaRecorder 的默认采样率为 16000Hz。示例 CURL 调用如下(您必须指定 api 键):

curl --location --request POST 'https://speech.googleapis.com/v1p1beta1/speech:recognize?key=yourkey' \
--header 'Content-Type: application/json' \
--data-raw '{
  "config": {
      "encoding":"MP3",
      "sampleRateHertz": 16000,
      "languageCode": "en-US"
  },
  "audio": {
      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6lLm+vvtNEEdL7IBfbs+D6KFiMlPeotw7mvarlYYey3rCSRGTwL3kZF9NFS6cRzEWaBmdKRD56HcyPCbiMhLB1Cx3x0rW3jJmVVPRtxsJnMjul8+5ICxaNJ9gKDA7tWwp9jCt4u+kZdI9CVBzVLkTlw8vpiBpjuHG8VcyJemk2ryKxtmesvPn+c+JqaHq/H5B1WH7QeTU8TWRcFOSnhxNOtqig0OsN3xSSyR5L7i7RJHvZfdLkAzioKOPQAK0DFV9Ao2JIucGsLeo4nwKY1ua0y2ZzJAapzIA3TLCn/JVRLX7G3ATvt1nS2m9kWthSiRbvqDYvF094BbEogw2Oxtcgu7aNmBXCDVcs9/NjXY7AuWgcmmDqSeuOpdTexb9sN9/2qvOlWqWZVOOFTPNMszcRWRojO6B8sF1EoubO6hrBkfwyIXIRz5XPUOlWWd7NbetI8asB8t2m5rv/mxuJxlfOrep18X7znUh1w7Y916ze+v9exdTJMTaPE95+LDu4u5VDXlYgwDh2Z+qqLeWB8iZDFVSuPHX1TFEEBwVaIz+rOyqz3f6An5eb607cjuLRmV3qRv9oJ31wfWvPy7BSzqkDdyMOnKZNPq22e+EBwPe6ZIu65Q0wpI/ld4ly1y+GY4Lc+Og93KQC52gxl2syL2p/pfyBnrAUxBAzGzT27hrgwc22NHYr2I3aIdd8I46UkJujDjcvy/xZe4fn6tITujMVcojdfv47ya4KeKuptr4eZQLNBLwXV9dFnyq/PQIV6QNhg2FKqlSn5W/9RgJpGudnuDmUyHR5mJ8uHoA9jt8zxIgFMLu1ibeIlYyXhpmmiLcIE1TQsmc90BcyRyqPoDfk//uxXgc/EIB56aWGqDz4e6jGrA/QX+o8Io3W4KbbwNTu6Cl5CfLTQwjop/5sHdfPIZ3bhsHlZGJ1tlOf2WS3sYOXkoES++xypIjYuY4nRRZw55GoqohYVZwNmmMLWesgfQnV+9WHjgHSfjhqcCvCqoBf28OrQCP1AfDmPIB3JCDsr0aLAEyeARjpq+IVZnRC5/XkibsawqcEvWQTuDvdJra305IsUZ6/3CEBw/9+KOgBlZmPnP95gGTZqEab60xcbQTiOUK9GnRX2cZL6QVXz7i3wFd9yJdoxY8uV5/WFUtSCh5R3JQFyQF7r0gOBZQCkdj3CG6Brq1gDiN0Q7pSWijOFe+Fodh+RxQDXOFW+HIyTvOFnOK3HQqqGLyy+Oq4nKi3P0RSIUSBbNPgS/CoNbrxMq+qx29BI2e3pIzYfbJLJR+WFiZNTEvKFdzFq4pOxqFuPlI95OE2cGvFDLJT3dWqrQsoBZwIWQpDr0v60dc7zU1TVpNxAK7Wix+Q5O602bkVpi88nmmX9bEWTbdKr2WjqXX5NAC8VqgYjmFkSs57odQX/elPyhVmBgo8Ld+uLN2RrIS2MXQauTz48zuDITTD0JW4W4dc4bovAT2dnUwAAwJkAAAAAAAB3RH51BAAAAGkDc9wa/0L/Qv9C/0L/Qv9C/0L/Qv9C/0L/Qv9C/0L4sBK6Bau7AriLi61KhBVVSFhyDxdsUd/b+sSqhCLHu/QfRyAbM5RBe3wiNf8QUwZ25x9Yfe48p9jRqXksehhB77fU1y+kWLGSdIfV5cbPdJJlA/BWV3KG3mV8ckZTrDIVx7PY/YlnzKKchtVQGZNzfyaSthkxX6SfM81qF3bJgZLRZlMcO9kOroTh5tEMtWWs9yqMxw8b8nwWWSRXP9VkyQlbLGyQifR9SW3P2MphNqeFKulPun+S6v0ikIvt1lvg0+PyKksGQ7jeKiYW0Vc8D89yOX/EiNXZ5Sv3YR6oNfmkmRD6NCYAKf9WimDUhCju2+Z6l7PBLsaqoonx1P4BB+oKZa8iYPQvYSGIUOz0qWbJefDkEVR9VPna4Y5KCJv6xwA+6OuPk3ZoxpSSLiifphNqMhvyv8XTcLECa59kfIL4iQHNdiHPuGr3fb9s9oc2JHEj3yU8RuLLIh5XD1bIXMuaGwExK3/LOkArP4KnniSbOG98UFj5LYdrmd6lddD+J2kxUE5WArxIWxu2D9DaLwGjykpP6ws+jAwsOrzqLbyqsw0kylkqcNbTa0VULSzryQTpQPcEdA/MZdzIK84qACLQQh5IoK+G9KyXTX/WP1Gxdm7FrmHxxcX2j/85aFOm5jeEuZt85Q0QwalslB5o6gQsBVwhj+wzyTNpx6E1+eQbErxCkTR0F7CDW+hThJ8f7LyivSrDUuSfaj6oiFZs0fNzoiK4MLjh0xpV7n2yDsgPwqGc708tD3l9ThRq8xmJts65pydN1kgKipNHIP45n9vBSDPMKOXdQlVNk1fhcEdp+JMiv8ZotrNt/Pln5s070TiytXVy6IUc+Js3enxxNsD4mp7piT3PTDVPknfEekqncDT1LTMW9g2eqIGZkUI12bLjepMzU8uwPlcROdQwKKaIFJUlxUQT+3Yc7Q7akivmkLKLV09KAPJhDZbMSRugrYWMFCrZxsVZ7VtbLnogJWzytTO0IhiCIdBEX4WXFfNYITQIA1ANP4Iq5ZUXxRpeHsSa5UOwhlRtN7zLjiR4P9p0cp8AeLXVzlZcAQF9LN4v1m4b+bmVxbn8dyUaZ+rh+JbZT/GXboqKzQZUz5eGVIU97m/SqcVQcFbEbIBWafN9XR/P3iUT7y5cflFy3wBT65sDBa/ZgHhKyXZdMF/t1NfX7616BVxGNwyme+Ctv7ZLqVkC6UuzROFDX5TQ2T3nLCTw+xxzDXBK4xli/6JYypCv/bx2trEPgw+wYaepCosCGkWaj51pY3yJGfUVudv/fnb4hVaBMYGVk+tBRx4v9ChaLgRKacY4s58KfzEroY4w4Zy+wKP7F1WWIKF0Pn3nftgo+DX1JZO+HE+kVY2XpnzM0Jd2PkUrJq/mWl2+TKnWaOB1+4JYFBHkxoefICNBs78Vb4gh5hvnUZJnc5QFOQPJGoZZv0dvc820OlZXkOBQgFgsw645Y8LotK3CGXbJQAZVaFsmiLBRk2yiDfrKCGoRbW3kxMOsntP8YrSS72/mLrHd4VbWNXnbMLAkz+z1QS6iNkOFRrCnmdnci9Mbk489o2XhVxMHXeJkHjC2Tm3Oip+D958sSm6pXs5i5jqlJzMI99jlBiLnQYV27Ood2n6/MAPLzeJTUCTDo8duC++SpXTtU8RAn7edxgXPtY8BIwwRxIV5zOG1Akz5yX+fLlvxNwJ20xEdGCBQnNKvDi98k9D47/eTtR1QAaJUpkekrKhvUUt3tU4KUWY+/hJRTNo5kxwSSIsgyABqhZLwse3zk47kAV7A+5/bxmqzPXWzBOoLmfVC3+Mruw7HdExb9by8DZyimXM1E3Uj5cg2mPiHRVgQq08uAxms7PPQTOfbvty1OwAraNo3+2SuIck26tTlQqCdDSY14g6a59olplPIdvSSI4Gy2kx2whqZuxEvc+45fILSaZ+agObst11enyo2S9llw9vVucxL4CthE4XJEZhP3AY+IG8dBTjeTRgELqiXpVGtOjSbrMm8d89E0bDgcWMrl95lvtbtC6mY8s20X+KrbeDoQmEljPB5J2zWGXQz7TGOd9Stwe7ZLODcE3aaS0ptDu0ghNKGWwXlSRhVcH9UFIlLhUhl75CjH0Z13f3UOsDL3Qmx6OwEHedxbBikV2n47+tADtFCYUbqp+kV0c7IOnRgbqn6p6HQKwDXgqnvDpvYCc3VQhDp785WryybingMi0LQ94asZGbpJ53QlD1tUPyqKbJZiQvW0NhmggS/fSYtEmFwCYHGdD+rWQsodCkpj9CSSxUdN7a7AwJuAVSYI0pRZMlTQK1ZKiY02kvfaUo7KzEh6nU4PUTxxzE/+0wESL73L+arC6ThihbaInLW6GxOOc22sRk11EP+rUhzxhG74FgtxRYwuzGgzivAhg3C0koisWA+XEyD81NYTds6Kf7oEgeqTz6KXvoyQA0EYc7eayWqEQmntlIEkdgyjgwd9TsNedMfHU0025TvhjE2TJHphvZZoo7ZQRleZyOb8IhKrVGKA68D5rZtywwah8bupTzGc0ZrQIpZl2j8c4jHgtrv8dbHQPTEFInuQgK494j48FODH3bTr4a9pIiJ5rjkW6VCbmFfX+SWJonZgc2Z0JybjF520wv6Vjwu4o9GTWtUZ3LkjAFHRmNnZg1ehgxwuM8TGdlhE9IHAv0VYjx36kYoSAr4WgY1690dYSoie27ggJFM84KAu9uV3uCCLwuUiTyppQdhzNoUSgV9yyu0kyruq1Lm03GNc4pI5GiiGaZGvpGMeCuuGBtKfxdePaoi/GgSIklSEFYCs3TvH7C9PKpYlefUsLy+tBFX7yYYLtJYIpopdGsxoseIp9Nvke/y/XYIMhbXnTofjsayKEoHyQCkdKn7eXPwj0vD+Bzzk95Y+LRM+rpoKNzq0gTiWiS7qOVC5XKkXNxxxBCFX9bqkFFDRKLxJQJMy65miqUv0mAr3z7IZNAB37gPEI24VJd0xWJB7hzsJffbGMIbRZvtVZ/4GwazkGvDD55WM4lfcoTx+qr9uY/7e5QD7HcGCEtiR7mmF7TAU6o4Qjsu6mbhzedAgTaVx8tqN0WYnYqA+gWM3Edlb+OipUTGInHu4i6ogI6JZXT3SUdG6hZUxfC3uFXz3nSR0/waeknZjiiJSGJibZMIAJ1wRClqagCllxjl5hUneE27AxyZ2fDknccVpPuALP3j32vnCo9vlAdzpar1qYc+5NO/TqnhUE/vqILfd2PchUKITg+GgA4GvXpzaMfDxo3DmwD0Ms4Qz9dMR/kyysXbxgLg/nZXp9M3LTqvd6dq6tyw+n4Ml+52N4rT+Zxf1tieM10c2sv06rgJEFqfJooWR0DZaf8W5J1EpmUB/y/s5yT6BFf6ZDWoW2i3CUVXA4C39g+xXN0U847IDu0ghzND8y8a73HLWPAVeTDw7QL4hUoHs2o4/vRwnKJls2KFneFdriBpyk73g48aB/eWNQ0vWpPsh6xUJMB51WFbys1uQjmBmSKVZV3g7ZxysHf1omnjPoTTjvVoB5z/eaGdA3NSCmO91Y8N3bVT8KnW2QhCkXcBg6ZEJaO/KE1I40qKaod5eXw4TG83lNLEm4AXfYwgdoSjuAT1sQvgtFIy7rbFZWkKv4lwnEdzh3hBnh79vXoANkLingfAUdcZ9QDzoIdo/bQyU+Gk0thKuZNx14g8zL7CgqwLDSBDRm9TV0MZ7gWB1FjJ7Zcz+gMXvCjy9B3i68jBkp3wZbYUPw6VPucfW1N35G70LjO6PVCiQDo8O+9x5wtNGSaRqHW14UwgzTpHBGQGCGBlY8G8Ni2dexneaU6YW4NWqEkPfza8MPvS5gOpFTQTJ3w3QfUDw9dg3cD4hbBQJisTqRAe5NngO1XsBy8f206NaUd8tbI1b8Xjq3TuAZDZs7rDLiVlRJu4LaJ+8ZPHrxEuVnDQG194XvLs3U6n914kXjlM2KOflAnVJ9RuWC1nt6POoTS/qanJ82d9gLJNf6zaw8JhyVvH00zqf/u5pjQ+bQdm1EABh3p7GghWFJXj+EkcffSGReNHVjaXZl0Kz2zYA+nvkqyTldJzz9CUubiHnkYd6fdzwuLrUNWRRy2o5YuDtxdifpm22JbvXrdWe0nYgtY5GEPghXHBb6RjqJqrzznGbaKopHe5/mrbXbj/iYNhu7upChftKC812rqicYQ/5mU5fN+jCa4NCuVWb820A6+f7eqMHYxH3xo0M2IyvBiv2JkAtpO8FkZLtnu0zPWEuTWr9qiYK8z9FbbYIwckkh624Pf3ivacdKD4haiwa/ChNgnilThu+lHX78hoR2Y2G6mOurrUySfYGuwgTyScdhiFpbSlMJgcJxlmw5okyzMh3gluEhhowX2OFFBlIVh3CHe8TrRvR1kl+UkUQvpChTyPj+uz7CQxDyHoS0kkkRMzp3M9/ftLG0gwGxrU5+43HK+HONEzIfB9Od+1LZ18maYYiLwsTi+Pe1Vs2xPjjv+F+445taSZzj6t5YU1uxQBdA1gBFJHGjxlTkCVY1gXBr3hTcaMqEvS1CgPOnBSRwi5SNej4XgTGxQojKPJ7hB/b8WNk5lujIJ3rmC2TIfyiniomGhxDgBTMGJ5xU/HqY5bPAl2AZN66HSpgrau8C4m2SE5uhqdl8hxxQyn1rId6PYB1tkR9MET5oEn9zeiK2ecdcaWJqhRkD2MoJbgS/Hmk6vbt6ACtkZn+sD4gumvctOUf/ZsW3q5n3hUAoCNyLxnuUht9FvgUJ38KyCMcnu9oX7LzLGyD4hgwpt0db7DPxQRcgtw+NswG4iFtLmZCpvR8LYGwXH6vpP4V9XqS9Qtt5FymnLbiKgFOwvatiobdgx+rCJWmjkbYCbeordpJhepPjDngZ3L3DAeHZGjO727MWK8yn7F0pJqxOED3Ku4B5Hg+l6N8R4whMXiwshkyl/N3V+zACF7he1OSU0ORjtvX+Yruq7256lF//xF3bXWbL6jjpyq5YbrjPJvMdAA8yPb3EtSX6uHPjacY1lHOVNoqV67fyTvZ1LnqSjE/IU0iovct/Rk5zn6BXuGThMyxv33thzXvBFeRELQ9G5WbnqVGZSsJs9t2LWqsltz2od+K1IQ6WhIQEYIxSrePAoh+MXWKGcmGolsQFnlwED4l5DpP8hwuixjovO5XSd9H3+ZD+He/GwrM/YqUsY8S4xmLYBeHSuvyRCdOCP8yhWNrrlAkrp5dQC+XU8P9jJP87Q8kxA+oXnOWkb0TiHTN68Tw1ksvwYvDUddqeHCH3UWFmabWKqLpWa0DW8nvBGbq/9CWeISUT+2yQ7eUuBpwT5hmTy3m8QHnTyB6pFq6JPtqQ4KOGmzEdRmQaZbyePIM1HThB4WALeYpCA+pQh15AFvtLj/+hLH6Mx0JQK4N1z0SV6qC7nz53Oxd/5o10ATvpKiOPYqyfjZVOxuVeVXJArOMhuI1psDUyG+29TtQzhRvrsVKV/+PMp+9Fqke5yDES1IMyztxaIJuLt4COBYqsPyq3dMT+ER/N5fHZ4yPSz95PKtzXgGQXKCwCr4ETD1tJIdNyK3a6k0Q/HnGLOcMXZPZ2dTAADAxgAAAAAAAHdEfnUFAAAArYSxShj/Qv/h/1r/Vf9r/3L/PP80/0P/Xf9X/0L4IpincqH71RaUqMs+/OdN5o5+Pp0S1kzVmmZpiu0F3YcG7Js5Xiegz4cyA+sNJijIZv0OnU3S/0X8iD8comB8JRK/81oByUo8gyT/F9NrMIHrLbukXZODCi12OiktnbyQaRTLp1f5CMNRszr5QyOTvjpRKZRt6S6Avrvcyh7ZXISyBqqIk4kFWf2268BI1GqK85W3aFGnq1VYH9bRIwB/PFamoLeFyQ+k0Fk4cGD1Vt1FX18btP4sDh0fvfwo16Y3g5NSW1YeF3pZCw0HiQQb1mtcdvAGJQ5XYove4r3nvm1KykeVJqIAZtqDBdOTijfDlHpHnkxsmLVo/zEFZGAYt53r6aTmceJ15AponCUuKIajeaVpW8tXfJSpNfhanXel5MOxmQWI7mTS1KLVtWsOd6to+a3NP7CnMCrLxdC6D5X4cAwZxnF5fHLpBf1rTBo2wRXAa0vAiQW1ASiG6kpBceJokSKLfNTn3WfBuPaVkegA5nO+uHA0y8a2B5aK8+xtNfQKwV2R6eV7/QcRx//OkjqYbbV3MvxVHG5D8eEC7Uq/vOLqUXi1GdfqkM6ScToN9MYsf5I+GeNOvAhDJ0LOjAKUSTIXoczghBeULFyQ74hHwB4DzxnAlFUSeYfL/VGrbbo2ODNd9d9hOxPtndhp6dzWXNhDoetZ5BRv9LEiiHo1aCg8clpAyQS9hJHmuzBnzEtgIGlYQANYXfUB+Hq/d3teIJRXBfbe7AHx5/lRbwB1X1pXJqELieJVGt4Vi75OoURJSTu2p64ecpgEPYfB+AUPXYt7eUwiRvLfQ/TtAmfictAAYspWtR/3CqMhqpXRDWJA3B3AjAsBsa/uPqLFcd+MbhDDniglP8nUsglGBpOoM/3+z+FjRpDVRP2wLp6oXgceMUy9PPoYuZEfI7ACr9W8a4zqmfwT3ROMWYpek3j+iERGzFaf3LU2ccsKvLLgbRyHmCtt/83/s4sRw/0g1yQjrx5Q9ZvxUfB+4oJ/ooFJTqipboQM614KV/8XVkKRLVt9k0v8+Hjx808d5Z1Wz37132aCfDA0vcL5osPiAzj4d1TMXQFjbhs12usPTP8zW173ktvheyEGxQhRcJ+fYsJCdrz2pnJvFjeXaGZlG+95Wwne13W3axAh26TjiabcT9O2Dv4c0P724TXMRGBpUV/tbZ32SgsZLi8L7E4IzuVubazgQcrsBRQLb6ABnYpB2nHXtCQqI+nUPhH1xDbfobPqRgZqkLi6zl9agQf0k50vIw163QswaBjzk15trksRBhTDRLVeLOEzB8ZWJNxI4c+JArPVYsgXeLSuaiB/+CUDqcRGct7U/9mk/6RpykeCsitGQhxIBfBx7EH3vLkFwWI2/5oyuqEiDY77H3Asx1zy5Xagw/7fpkgzvoPt7qK1LtDdVkEnRx/cai7YWTE+rTW0JzYnI6A+cpsgXoDDkGmALsAgL5fydmQ9QvCRHvGsV9TPPq4I7ec9nXDT4xiR5Bxj1nUsZwhmmcgLIrftvDQOXkmYaWWbPKT4FIuHS5H4QxgtLfAIGH/JxGx4UomM2jqn7h+FSxsCij2Q1S8CMhBG5l6Cap9AnpJo56aH0UFu8mcKpGVqbZP/cHrTbnlOnVxM4R/dyt72dtf7hAyLCeyM/9+meI1urFRO1egTsdFUfeO1GuyNburllQvGK95NmYXnHsj29HWP4HNJ02eC9ZTs/ns/oGAuYwGbHX0kea2oNbxqzlGJ89iV6z2rA+79tCFxrOT6NiRoYXUBijOnyLRmyHv6aZjLCP2ZW/YljVd9iezueFcKhcU8LwrlRXApyqr17HiGbjmsFqqmHyM/HZThWxYyWqnYiyobFpBHSqk1IK2jYSjGI/KGhE6gv1ZRCzz9ajwVCwzSCXQIJtVR2WIfpo7gRCnEEO6uUBY/91JCKaEvkjELOzBwIXCdGAu2TpBf5+9YWRDi0t0bJYWePvaO7FR6fnOv/3uvG1yB+N7HGEE9Zl/6YV6IhDws+YaP3vGfLBrbe45un/+bomCIxD4XWuMOkkAvSWWqu6RB0ON5N1p7XrAjk9jRhk02ptByCxUrwjCrzVlRhizB7Y7im4yB1x7ZM5N8tbq5jR/QFXoHJ3OpkpMGQ14epOOiWHrdmos6NAtbzhbGW6cQdGnHk+myA9aN59405PytOGGTzCqE/w3mgcSYFH4K/lGlP1mGbDqKCaqlgzXxQaAwban9wjriGBEn38hcD/izElTM8IQskRCsfXezrybKx1MVJKfIarnt+PhpoJ41tNOqu19x+BjGqXNYyapod873t+o6M6+r06FcVjUI/dCw9CLiwafL6erArZ/Z6RLaw5oKUMj6QLSTbTx+x1wx3Nbw8ZcM4OwlJ4GttrtqHuI251SXqFH/Jh0DGf9Ptzzmu6/u3yM29ENcdRP5k/WCVXGK9reXAa9JVq36Wfs6A4ryqqqYg5Y2qoYdlodOc3H43rZORv5opTXklytmwO6dKJ+rN3Ar30FTF5K9lwsOjaU/O47C/5mu+R65dEjZLQkYp+i/ujWULXPODgku3YcIH14rPlX3REbTfjxRCNO/MotAeP2udmVVsoCd2bRGNTXE3bGO244dGwnsPEIa0ApXtQw39f0RbdczIh/VDZ4PwkUcD2LNqX6I9NSKLwwwCM7naM8l1bPhMXFqUNh4cRAl+rz6C1PTHWohgmWmseAu5hPzHrCb+/xtVLniVfbQFRh0UXorCJ/Hpsg6tShUVI5kfnPVn8sX7On/Kd11NhjBYYvpnBbmHbDGe4wDHTi2uAsddRTDmSEweSEP1z+1gWYqFcqimLAzHoK0dTXhxDJINZZLrku4c70ny6cWPmdHzFdawasK/+iVcFkofst84tfhTI2dFVtnajuZLBcOTzB5560nyjaKkzXVf2nNlAQGRuS5RtGX3CuYlAn7E8kqCeN3iEWw9F8FoUTBf6exOQbaI1r42n7ROS0pfQ+prbS1B0xsC+EDhieVRXniw/d0oABWzjRqMhTKShX+iO1EOrhvWvxJXl2nt+3D0wEeoYJ6mDotqrMyNYY0SU3jKU2rZMYmzUqg3GESgiYjkXUr60vWgUmhsQUcUyTgHYIJ2i0egMxMLAAoU7+5gmws8I+g4yDMQJtjeAYdF5cBkOmBC1BKN/h7WQjYu5MvnJ8h33lWRKBph40OU6tfIlRbpBd7f6QM7DnkUyZ4OKo6vD2JfQw9y1hzAxsljaH2eg7sjx5l6RP1kCyxrVMRDm5wWgIy7f1dN3VHMcLCv/SP5rnGKT5DWghVlgQdUlKXh9RXyRj7lgoNfbaUgUIJJJgCArBR3g3jNWxRTsdP63hG4DlwEUGEWpnHahCWqZHfTBTfKgSg3r5yFGFmcJ1Bizr17VL41z/lpwpRis1vf6hA/m52Y+I3xS8cWSx27YlpnwkgJJPrXP3D1OvEMnBy1LsKXDH24g13rqmuO6/UaBcpU1Wjcpu4iMvMSdSmi0Zyhl7VEzrhxXb+MK0YY5DGzRO+dMwpKxQ0CnES0/a4U+cHHpRhBhA/Ri7Fhg4XtcgPnCqushbTn1pq59HE6FBP238WkmamimsJkOXjchiYjbApe63QBuBMvTcv+Esk6nc0Vh1D4Vlm4vIXVSlvOUpb0+MYcbmWl0FEWS2P0EpYM65qseuWyatXkWzQhfpB8FYF/+asWwJggey6volX2gJKDV7TDwAOqv/NRrn6zyu+s/m2b6ntaRyOd4Mu70/1fEUePAbpRMd/1MknHN+VdgOak9uLiygwiMtKBac4KO9ApzlFM+Sa/ixL+NWAeM8XQE/l85mvxHTBGvNdsH0aKU0uos1JGKD5OjWvs/zp05hM5eY1u5fNQuLOkvVRiulrRJ7Ki35DCuYBkwFEewdDAhjXx5pj/m21bszXb9KeuiREtcd7jM0nH3OYYzSlwvnqqkFTukaBNN7dfGFbvgeTzetbhPHZ4qHl6lsdtwRYoWfcu4LqOeSuQeXo/QNiI42WrN2EAfvnDv/KiiCHc2qTg+ET2iBKGpxbvH6VJM9GNBvahBg+adUxf31nkeCMSZqpX63R6x3RzqEgzW3FLFR4Sx00JfDuKEaaHKGVguzI8swwqMnFmeuEKJXJDpD0FonzdNhGSJKxWO9v3PS2hmRp11iofkr9c8DGvv+SfsmR21t9iVkQndWgV2Abu1FyOguwt2XxoN1OZOgisx89MstBJmUoi79LI5T8y/ETRvjVuTIMi3lJdmAQjxUw6crK+VggrpB5d+W9uXCO+VP5Cm2z+TiRF3qaQDI9lUWIm68eKhJd8VCMIuQoEWCvTMl7gT/b+yNi5d+tiWFcHc/5LCijiDW5aMsgtsmu13Gk3796R60xALGgqxhHbtahZJsqbA87MkHPpDQ/83Q9NcM4PI87PgFNtFxtRNQzNqcIwtvLHY4dPucbdXoNSjWDcaMMmBdtG02DISloQ0yp1ZVotrF+LN8pA3S27XqXmD5WLSi/e2DL10tgzd6LPKzsT8fWDO299fLERAI7YQoszsSNoM7njxB3JrRL7t8QBt0oR0QaARhERUzgvC82Wki1RkV3c0fjcQdeFHZ/ETzUea01Ew50UdqiEDXhqokYqwjcXaDJnNrXKV7oXoWx1a2ZDWXQHw9xgRKQCBP9nYASk90rV4MtzTaCetvJN+k9hEf+yTWq8+Wq8P5kU4ELRfjfL/gTw5oNYYP2j5MTJ3YqcymZAT3Z1fj3P2/mj4J7PtSwXcSxtzVFAbP0nW4i7crdRfs/5UWy/xLf/F8Tmu/gcZn2KgIoZWq14uIrilfpiXvLFJWFvXqKDwmqR6vIsnR2tRBVHcrtCErPoiUdVb/5ffqBkhrbeIz5MVOY3VIhmkVrzyJ5SLmBRsjda10qwN5MaNFCoSona6snnpgQBXeMX3nT2bKTbBvoghwVoSJMLHr8iW4//BLcG1cXMI8Zn7PPXgYOcv7A4skgWWW3Z25vr4EL3/o6iZd85FflmLWFvKSI2CsvIW35878LOTDEsKfzzOisYJ2H/TuCeUwCKVFdzWfGQb9rBCyenH5gcXeuQXSIAmXAp+m6MLpPLo32Xdaheo7aTUsyNs7U6Sf3DmjLLTb5d3D4Jv2CoBHZihlhJEEWXZyVAN/RX++oZBKGHk8XA7m1P/jetenDtSoA3CARQae2oncqLud4aVO/wzkCx2NiSR2zhRqW6ZaoCuIn3ws7Kuaz8EZTnPOY0OgXHCknWXlCX+qAoitEZv+5Htt/oM3AznvehbbxTtrfZk3gSRWBPnBBRyDRHLfChssqJhMkNR5vwGI4f1iWFhIKAOl5nkQiWdW8l1b5wW/JB/MoGTNSTjY504xvzd7MIealDKZIoEdrWxNpnDH65ykP2QOQFjLEj1ArllPT5doc7W12DxkqdruhFkvfWtqsNFS6xJXf1RUqgtFebQ8LexwvGvxKIvntbkcD36iY9zetIDGxM36NQuILV5gbA+uLnPfj0TwBAtaXkc8QhEGPjOlDgGRBB43rXsMQ28lFa/7hYXwpj5kQJweP+Q00UQzhtiCzO06aacr+9l69SQXml+cjG8cm6Q5TQ80lPk9nZ1MABDjqAAAAAAAAd0R+dQYAAADflqtJFP9C/0L/Qv9C/xr/GP8Y/xj/FP/C+N646Dp+AN2hvHgyRG4omCdK4o46F0hSdiLh70SJ0mDiDOeFXhkAO3Q2183Zb+Y49BaG+VZvtw37QC+NDXwAQad5i08A+P4pa8qOwHz0Jvz4GB3nGQmSdJ5I0hGUTxmDs6l/mSQw/43RoisSvSDK3RQXupEbr4+BIFB8EJRKunhtYNQRa0LOZOtFZXKbyHAqFYZgSpJlt80jsU/5ODShMX95vOhyvZA08UHfcFU3BYe+xqQfJ1rBVD2Wpapmr83LDG+RGmDRhIr2+nlPEkJM3OA7WSENEwhFr3Oy6iaXjk88kgMdRVtkB38J4//80RhMGg1K/Bmq9K0GPmNMVjT2ah9zA1XQag7cR/p7fcAqTJ0f6LF3WDexsaFp7jVQAyP2POX5FwsLT+2Sp3xkwWkAtqzsl5L1GNncPsBUk6HStc0/+LRmlnutcZZKLanjMKc9fFQxpC6ec+fg0J99CSXQCOAsqsx6wWAU2dET4ljH6bFt0u7KBenPWW3j+AXHIOBfQyUHno9VGnReVD3dcUPpU49kacc0nDWgqz2tkti2GGFL2QXtpfWLwjMRs3dujuZ+8TVRFL6U4ErrOuG2BNq4Y3894soNmyro1AU4JZnZ0N5oV+fTm9CMUi9CfRaMb2EzHokvD0ba4cTWaCcO2eyzMyXPAP0yjKlrFEnYptDFG7ZDMS1P56dZ6gUq/DnQR3pMM1wh37dqScr+ykztF4kUAzoGvMQusUHd7KQJ6yp5GvG7S2G3QRi7NTNfC42PQAUxm56wEjE4Tub6VUXR598ZRXSgKI2pTArwwd7GU93PB6lRraCZ08txbaVcie2TwueigqI1kperX3BVpuzqvDZXQpzX+LRhWZIXfr9py14mrodio4Ta17OFrTOJ5hRJHqk3iJPs2OvJZSHyrTYK24qcRE9KoE/iIMH4+QhX5qV/mXA6pHsnvWGxV8imi+OWfBQ6+JGGOHoKREW+zdbBSKZ2skSIx+ejhUinelzY7hd3SvtAydhAgEo7NEryM6aD4Z+4dQLC9Osn3fQtcTXj0/EWYtoLMeOHgxI7juSxpugUC1Gt5jB9COcoFlCYmaOnLTYdSTTUfn3U+x4ZtrLoVIxye2RCRW7HMImXXrH/INQIlu3sgIc2jJ4e8rlecwnYa3CmlLAlsRfZfsfOsip1W/4jpY/eD+GlJaCD8NHpOqtSuPObik3Hu3UUUUcjJWLgir6KEsT8t/ySuteAgonrFez21i0i2vK+5KfFaaXgQI+bpxCz5ZXzMzd6HzRs6IuCIzidWDyb+HE7vj48ibYvhezkdhdtXkiaRIuXIIP3BCEzoE9a6w7r31oRhWI6a1KObfTIjQRMAD1klkgA+q0hPK/XJmRQ+y+b+uRAdEDcE/N5VawJFtvPFRJj0NY+P3t13EBZvV9y3uCWPL9fHIvO0m9Ox2aZ21kKPge852YDsussUHo1AMB5dKY4tO7BUF74Nx2ueFCJXjTGdIdoiEmlzm5WVI53uKkVoTKE59is2Qt8x8ezxshCWeJgwE7fL8ezdJl4mVH04st7Oktge5Y9Nkd7V1oFZrStc7+mJ7aU2WHOzy4sft4/SW2Y5YxcIWe9ktjPCoQg8wCrGkwR2BssOsr52S9oSqfgmODsPW8yOt9UNCaXOdOMr04XtbYmmF9sbqgDmSWka7fFovpuYQUkqQqo4XJ0P30M5jwcGdA7RGJsqNpAuB3Z+LAMnQIgLmSuj6rdFBYTfQLwE70c+wrGwFt0vPMmPxrB1xxQMfiSGbnK0RVUDv4JZuTwaXlPVmIYIAjmMPVdHzk21IM6NIpesL5Z0y7EZvgQmPGKb5yVqGlQtdhUvprAz6WFYatTncwLSk2Yq0WlaV2QUxdwCKmub/NK/seVCjfxVb55+coxX4RgB9AkFFTXXR+Q2BM4p+w+ZSvWeZ7o6ZoMkFSpgbtLaNDrUf6F6NCK/LKk7x1mfG5v4QjjpaUwmiRfe33M+DsSNqMRzs4BCktgNDjbWIWk81McStZOggiBhcNrMc+qBfxeAthU8CoMROpAsEn2cIQIK4imr/HIFhlCyCCPqiPxepWxTuTCY3cCLTNqIMdu7NH4rLpOEWWDWHQEDGLqq0eWftyN9zme8tLN3S+LTuSpzMnjwWUzlV1r5sEjELjOLnywueS+YSSCJKiBq5m6u6P/9BJfmROYq9vAKpocMwMWxknIV2jF5eDwK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  }
}'

此外,这在 Chrome、Firefox 和 Safari 上对我有用,但对于 Safari,您必须在开发 -> 实验功能 -> 媒体记录器中启用 MediaRecorder