将音频从Node.js服务器流传输到HTML5< audio>.标签 [英] Streaming audio from a Node.js server to HTML5 <audio> tag

问题描述

我一直在Node.js中尝试二进制流，但令我惊讶的是，确实有一个工作演示，演示如何使用node-radio-stream获取Shoutcast流，并使用分块编码将其推入HTML5元素.但这仅适用于Safari！

I've been experimenting with binary streams in Node.js, and much to my amazement do actually have a working demo of taking a Shoutcast stream using node-radio-stream and pushing it into a HTML5 element using chunked encoding. But it only works in Safari!

这是我的服务器代码:

var radio = require("radio-stream");
var http = require('http');
var url = "http://67.205.85.183:7714";
var stream = radio.createReadStream(url);

var clients = [];

stream.on("connect", function() {
  console.error("Radio Stream connected!");
  console.error(stream.headers);
});


// When a chunk of data is received on the stream, push it to all connected clients
stream.on("data", function (chunk) {
    if (clients.length > 0){
        for (client in clients){
            clients[client].write(chunk);
        };
    }
});

// When a 'metadata' event happens, usually a new song is starting.
stream.on("metadata", function(title) {
  console.error(title);
});

// Listen on a web port and respond with a chunked response header. 
var server = http.createServer(function(req, res){ 
    res.writeHead(200,{
        "Content-Type": "audio/mpeg",
        'Transfer-Encoding': 'chunked'
    });
    // Add the response to the clients array to receive streaming
    clients.push(res);
    console.log('Client connected; streaming'); 
});
server.listen("8000", "127.0.0.1");

console.log('Server running at http://127.0.0.1:8000'); 

我的客户代码很简单:

<audio controls src="http://localhost:8000/"></audio>

这在Mac上的Safari 5中可以正常工作，但在Chrome或Firefox中似乎无法执行任何操作.有任何想法吗?

This works fine in Safari 5 on the Mac, but doesn't seem to do anything in Chrome or Firefox. Any ideas?

可能的候选对象，包括编码问题或仅部分实现的HTML5功能...

Possible candidates including encoding issues, or just partially-implemented HTML5 features...

推荐答案

Here's a (slightly outdated) summary of the current status of HTML5 Audio and Icecast streams.

如您所见，MP3源似乎只能在Safari(甚至可能是IE9)中运行.您可能需要尝试对OGG Vorbis进行一些服务器端转码(使用 ffmpeg 或 mencoder ).我很确定我在发送Vorbis数据时能够使Chrome正常运行.

As you can see, a MP3 source only seems to work in Safari (and possibly IE9). You might need to experiment with some server-side transcoding (with ffmpeg or mencoder) to OGG Vorbis. I'm pretty sure I was able to get Chrome to behave properly when I was sending Vorbis data.

尽管Firefox仍然很烂，也许它不喜欢分块编码(所有SHOUTcast服务器都以HTTP/1.0版本响应(尚未定义Transfer-Encoding: chunked)响应).尝试发送带有OGG流的Transfer-Encoding: identity响应标头以禁用chunked，并且Firefox MIGHT可以工作.我还没有测试过.

Firefox was still being a brat though, maybe it doesn't like the chunked encoding (all SHOUTcast servers respond with a HTTP/1.0 version response, which hadn't defined Transfer-Encoding: chunked yet). Try sending a Transfer-Encoding: identity response header with the OGG stream to disable chunked, and Firefox MIGHT work. I haven't tested this.

让我知道进展如何！干杯！

Let me know how it goes! Cheers!

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