如何通过html5播放.spx文件?

问题描述

看来，它支持spx: http://dev.w3.org/html5/spec-preview /the-source-element.html

from html5 spec, it seem support spx:http://dev.w3.org/html5/spec-preview/the-source-element.html

使用:

但是从我的尝试来看，它不能同时在Firefox 17和Chrome中播放，您能帮上忙吗?

But from my trying, it can't play in both Firefox 17 and Chrome, could you help ?

推荐答案

我在GitHub上发现了speex.js( https://github.com/jpemartins/speex.js )可以解决您的问题.使用speex.js，您可以将&迅速将speex文件(* .spx或* .ogg)解码为wav，Chrome/Firefox和许多其他支持HTML5的现代浏览器都支持.

I have found that speex.js on GitHub (https://github.com/jpemartins/speex.js) can solve your problem. With speex.js you can demux & decode speex file (*.spx or *.ogg) to wav on fly, which is supported by both Chrome/Firefox and many other modern browsers HTML5 ready.

• 在您的html中，在 https下的* .js文件中: //github.com/jpemartins/speex.js/tree/master/public/js/lib

<script src="bitstring.js"></script>
<script src="pcmdata.min.js"></script>
<script src="speex.js"></script>

• 下面的函数将完成将spx转换为wav编解码器的技巧:

/**
  * @param bufSpx ArrayBuffer (Uint8Array) holding content of speex file (*.spx or *.ogg)
  */
function decodeFile(bufSpx) {
  var stream, samples, st;
  var ogg, header, err;

  ogg = new Ogg(bufSpx, {file: true});
  ogg.demux();
  stream = ogg.bitstream();

  header = Speex.parseHeader(ogg.frames[0]);
  console.log(header);

  comment = new SpeexComment(ogg.frames[1]);
  console.log(comment.data);

  st = new Speex({
    quality: 8,
    mode: header.mode,
    rate: header.rate
  });

  samples = st.decode(stream, ogg.segments);

  var waveData = PCMData.encode({
      sampleRate: header.rate,
      channelCount: header.nb_channels,
      bytesPerSample: 2,
      data: samples
    });

  // array buffer holding audio data in wav codec
  var bufWav = Speex.util.str2ab(waveData);
  // convert to a blob object
  var blob = new Blob([bufWav], {type: "audio/wav"});
  // return a "blob://" url which can be used as a href anywhere
  return URL.createObjectURL(blob);
}

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