使用javascript将wav转换为mp3

下面是一个代码，我想把wav格式转换成mp3。参考

Record.js

。但这已经超出了我的想象。谁能解决这个问题？（视图由空的DataView组成，即DataView{}）

您可以使用，因为它将直接提供mp3音频

如果您想了解它，我实现了一个非常简单的版本。请注意，使用此实现转换的WAV需要是mono，否则结果会很混乱

var convert = function(){
    var arrayBuffer = this.result;
    var buffer = new Uint8Array(arrayBuffer);

    data = parseWav(buffer);

    var config = {
      mode : 3,
      channels:1,
      samplerate: data.sampleRate,
      bitrate: data.bitsPerSample
    };

    var mp3codec = Lame.init();
    Lame.set_mode(mp3codec, config.mode || Lame.JOINT_STEREO);
    Lame.set_num_channels(mp3codec, config.channels || 2);
    Lame.set_num_samples(mp3codec, config.samples || -1);
    Lame.set_in_samplerate(mp3codec, config.samplerate || 44100);
    Lame.set_out_samplerate(mp3codec, config.samplerate || 44100);
    Lame.set_bitrate(mp3codec, config.bitrate || 128);    
    Lame.init_params(mp3codec);

    var array = Uint8ArrayToFloat32Array(data.samples);

    var mp3data = Lame.encode_buffer_ieee_float(mp3codec, array, array);

    var url = 'data:audio/mp3;base64,'+encode64(mp3data.data);
    convertedPlayer.src = url;
    convertedLink.href = url;

    var name = file.name.substr(0, file.name.lastIndexOf('.'));
    convertedLink.textContent = name + '.mp3';

    converted.style.display = 'block';

    Lame.encode_flush(mp3codec);
    Lame.close(mp3codec);
    mp3codec = null;
};

---

我认为最好的办法是创建一个后端服务来实现这一点……recordmp3 js很棒，但它在Firefox上有一个bug。FF浏览器在转换为mp3时挂起

var convert = function(){
    var arrayBuffer = this.result;
    var buffer = new Uint8Array(arrayBuffer);

    data = parseWav(buffer);

    var config = {
      mode : 3,
      channels:1,
      samplerate: data.sampleRate,
      bitrate: data.bitsPerSample
    };

    var mp3codec = Lame.init();
    Lame.set_mode(mp3codec, config.mode || Lame.JOINT_STEREO);
    Lame.set_num_channels(mp3codec, config.channels || 2);
    Lame.set_num_samples(mp3codec, config.samples || -1);
    Lame.set_in_samplerate(mp3codec, config.samplerate || 44100);
    Lame.set_out_samplerate(mp3codec, config.samplerate || 44100);
    Lame.set_bitrate(mp3codec, config.bitrate || 128);    
    Lame.init_params(mp3codec);

    var array = Uint8ArrayToFloat32Array(data.samples);

    var mp3data = Lame.encode_buffer_ieee_float(mp3codec, array, array);

    var url = 'data:audio/mp3;base64,'+encode64(mp3data.data);
    convertedPlayer.src = url;
    convertedLink.href = url;

    var name = file.name.substr(0, file.name.lastIndexOf('.'));
    convertedLink.textContent = name + '.mp3';

    converted.style.display = 'block';

    Lame.encode_flush(mp3codec);
    Lame.close(mp3codec);
    mp3codec = null;
};