HTML5 <audio> LIVE流媒体的糟糕选择？

您无法减少延迟,因为您无法控制浏览器代码和缓冲大小.HTML5规范没有强制执行任何约束,因此我没有看到任何改进的原因.

但是,您可以使用webaudio API实现一个解决方案(这很简单),您可以自己处理流式传输.

如果您可以将固定大小的MP3块分开(以便事先知道每个MP3块大小,或者至少在接收时知道),那么您可以使用20行代码进行实时流式传输.块大小将是您的延迟.

关键是使用AudioContext :: decodeAudioData.

// Fix up prefixing
window.AudioContext = window.AudioContext || window.webkitAudioContext;
var context = new AudioContext();
var offset = 0;
var byteOffset = 0;
var minDecodeSize = 16384; // This is your chunk size

var request = new XMLHttpRequest();
request.onprogress = function(evt)
{
   if (request.response)
   {
       var size = request.response.length - byteOffset;
       if (size < minDecodeSize) return;
       // In Chrome, XHR stream mode gives text, not ArrayBuffer.
       // If in Firefox, you can get an ArrayBuffer as is
       var buf;
       if (request.response instanceof ArrayBuffer)
           buf = request.response;
       else
       { 
           ab = new ArrayBuffer(size);
           buf = new Uint8Array(ab);
           for (var i = 0; i < size; i++) 
               buf[i] = request.response.charCodeAt(i + byteOffset) & 0xff;
       }
       byteOffset = request.response.length;
       context.decodeAudioData(ab, function(buffer) {
           playSound(buffer);
       }, onError);
   }
};
request.open('GET', url, true);
request.responseType = expectedType; // 'stream' in chrome, 'moz-chunked-arraybuffer' in firefox, 'ms-stream' in IE
request.overrideMimeType('text/plain; charset=x-user-defined');
request.send(null);

function playSound(buffer) {
    var source = context.createBufferSource(); // creates a sound source
    source.buffer = buffer;                    // tell the source which sound to play
    source.connect(context.destination);       // connect the source to the context's destination (the speakers)
    source.start(offset);                           // play the source now
                                           // note: on older systems, may have to use deprecated noteOn(time);
    offset += buffer.duration;
}