mp3转html,使用javascript将wav转换为mp3

您可以使用

Recordmp3js,因为它将直接提供mp3音频.

如果你想了解它,我实现了一个非常简单的版本here.请注意,使用此实现转换的wav需要是单声道或结果将是混乱的.

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;

};