使用FFMPEG实时流式传输到Web音频API [英] Live streaming using FFMPEG to web audio api
问题描述
我正尝试使用node.js + ffmpeg将音频流传输到仅使用Web音频API的局域网中连接的浏览器.
I am trying to stream audio using node.js + ffmpeg to browsers connected in LAN only using web audio api.
不使用element,因为它添加了自己的8到10秒的缓冲区,并且我想获得最大的高延迟(最大大约1到2秒).
Not using element because it's adding it's own buffer of 8 to 10 secs and I want to get maximum high latency possible (around 1 to 2 sec max).
音频播放成功,但是音频非常嘈杂.
Audio plays successfully but audio is very choppy and noisy.
这是我的node.js(服务器端)文件:
Here is my node.js (server side) file:
var ws = require('websocket.io'),
server = ws.listen(3000);
var child_process = require("child_process");
var i = 0;
server.on('connection', function (socket)
{
console.log('New client connected');
var ffmpeg = child_process.spawn("ffmpeg",[
"-re","-i",
"A.mp3","-f",
"f32le",
"pipe:1" // Output to STDOUT
]);
ffmpeg.stdout.on('data', function(data)
{
var buff = new Buffer(data);
socket.send(buff.toString('base64'));
});
});
这是我的HTML:
var audioBuffer = null;
var context = null;
window.addEventListener('load', init, false);
function init() {
try {
context = new webkitAudioContext();
} catch(e) {
alert('Web Audio API is not supported in this browser');
}
}
var ws = new WebSocket("ws://localhost:3000/");
ws.onmessage = function(message)
{
var d1 = base64DecToArr(message.data).buffer;
var d2 = new DataView(d1);
var data = new Float32Array(d2.byteLength / Float32Array.BYTES_PER_ELEMENT);
for (var jj = 0; jj < data.length; ++jj)
{
data[jj] = d2.getFloat32(jj * Float32Array.BYTES_PER_ELEMENT, true);
}
var audioBuffer = context.createBuffer(2, data.length, 44100);
audioBuffer.getChannelData(0).set(data);
var source = context.createBufferSource(); // creates a sound source
source.buffer = audioBuffer;
source.connect(context.destination); // connect the source to the context's destination (the speakers)
source.start(0);
};
任何人都可以告诉我哪里出了问题吗?
Can any one advise what is wrong?
关于, 纳扬(Nayan)
Regards, Nayan
推荐答案
我让它正常工作!
我要做的就是调整频道数量.
All I had to do is adjust the number of channel.
我已将FFMPEG设置为输出单声道音频,它的工作原理很吸引人.这是我的新FFMOEG命令:
I've set FFMPEG to output mono audio and it worked like a charm. Here is my new FFMOEG command:
var ffmpeg = child_process.spawn("ffmpeg",[
"-re","-i",
"A.mp3",
"-ac","1","-f",
"f32le",
"pipe:1" // Output to STDOUT
]);
这篇关于使用FFMPEG实时流式传输到Web音频API的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!