iis做的网站其他电脑能看吗福州网站排名提升
总结
最近在写直播项目 目前比较重要的点就是推拉流 自己也去了解了一下
ffmpeg
FFmpeg 是一个开源项目，它提供了一个跨平台的命令行工具，以及一系列用于处理音频和视频数据的库。FFmpeg 能够执行多种任务，包括解封装、转封装、视频和音频的编码和解码、流处理等。它广泛应用于多媒体处理领域，被许多项目和网站推荐使用。
FFmpeg 的主要特点包括：
多平台支持：FFmpeg 可以在多种操作系统上运行，包括 Windows、Mac OS X、Linux 等。
功能丰富：它支持大量的音视频格式，能够进行编码、解码、转码、复用、解复用、滤波、转换、抓取等操作。
命令行工具：FFmpeg 提供了简洁的命令行接口，使得用户能够方便地进行批处理操作。
下载ffmpeg
官网 http://ffmpeg.org/
配置环境变量 添加到系统环境变量中
输入这个ffmpeg -version 出现这个 说明成功
node端
const http = require('http');
const express = require('express');
const socketio = require('socket.io');const app = express();
const server = http.createServer(app);
const io = socketio(server);
app.use(express.static('public'))
var spawn = require('child_process').spawn;
spawn('ffmpeg', ['-h']).on('error', function (m) {console.error("FFMpeg not found in system cli; please install ffmpeg properly or make a softlink to ./!");process.exit(-1);
});io.on('connection', function (socket) {socket.emit('message', 'Hello from mediarecorder-to-rtmp server!');socket.emit('message', 'Please set rtmp destination before start streaming.');var ffmpeg_process, feedStream = false;socket.on('config_rtmpDestination', function (m) {socket._rtmpDestination = m;});socket.on('config_vcodec', function (m) {socket._vcodec = m;});socket.on('start', function (m) {if (ffmpeg_process || feedStream) {socket.emit('fatal', 'stream already started.');return;}if (!socket._rtmpDestination) {socket.emit('fatal', 'no destination given.');return;}var framerate = socket.handshake.query.framespersecond;var audioBitrate = parseInt(socket.handshake.query.audioBitrate);var audioEncoding = "64k";console.log(audioEncoding, audioBitrate);console.log('framerate on node side', framerate);var ops = ['-i', '-','-c:v', 'libx264', '-preset', 'veryfast', '-tune', 'zerolatency','-c:a', 'aac', '-ar', '44100', '-b:a', '64k','-y','-use_wallclock_as_timestamps', '1','-async', '1','-filter_complex', 'aresample=44100','-strict', 'experimental','-bufsize', '1000','-f', 'flv', socket._rtmpDestination];ffmpeg_process = spawn('ffmpeg', ops);ffmpeg_process.stderr.on('data', function (data) {socket.emit('ffmpeg_stderr', '' + data);});ffmpeg_process.on('error', function (err) {socket.emit('fatal', 'ffmpeg error!' + err);feedStream = false;console.log('意外出错',err);socket.disconnect();});ffmpeg_process.on('exit', function (err) {socket.emit('fatal', 'ffmpeg exit!' + err);socket.disconnect();console.log('exit',err);});socket.on('binarystream', function (data) {console.log(data,'48888');ffmpeg_process.stdin.write(data);});});socket.on('disconnect', function () {feedStream = false;ffmpeg_process.stdin.end();ffmpeg_process.kill('SIGINT');});
});const PORT = process.env.PORT || 8080;
server.listen(PORT, () => {console.log(`Socket.IO server is running on port ${PORT}`);
});解释一下代码
开启一个子线程用于运行ffmpeg
var spawn = require('child_process').spawn;
spawn('ffmpeg', ['-h']).on('error', function (m) {console.error("FFMpeg not found in system cli; please install ffmpeg properly or make a softlink to ./!");process.exit(-1);
});
用sockect进行连接 当监听到connection事件之后所做的事情
io.on('connection', function (socket) {
....
}
socket监听start消息
io.on('start', function (socket) {
....
}
设置对ffmpeg进行操作的命令 用于推流
var ops = ['-i', '-','-c:v', 'libx264', '-preset', 'veryfast', '-tune', 'zerolatency','-c:a', 'aac', '-ar', '44100', '-b:a', '64k','-y','-use_wallclock_as_timestamps', '1','-async', '1','-filter_complex', 'aresample=44100','-strict', 'experimental','-bufsize', '1000','-f', 'flv', socket._rtmpDestination];ffmpeg_process = spawn('ffmpeg', ops);
这个data就是接收到的数据流
ffmpeg_process.stderr.on('data', function (data) {socket.emit('ffmpeg_stderr', '' + data);});前端部分
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><link rel="stylesheet" href="./index.css">
</head>
<script src="https://cdn.bootcdn.net/ajax/libs/socket.io/4.7.2/socket.io.js"></script><body><header class="header"><h1>Start a Live Stream!</h1></header><br><br><label for="option_width" class="form">Size:</label><input class="form" type="text" id="option_width" value="1280" /> ×<input class="form" type="text" id="option_height" value="720" /><br><br><label class="form" for="option_framerate">Frame Rate:</label><input class="form" type="text" id="option_framerate" value="15" /><br><br><label class="form" for="option_framerate">Audio bitrate:</label><select class="form" id="option_bitrate"><option value="22050">22050</option><option value="44100">44100</option><option value="11025">11025</option></select><br><br><input class="form" type="hidden" id="socket.io_address" value="/" /><label class="form" for="option_url">RTMP:</label><!-- RMTP YOUTUBE URL/KEY--><input class="form" type="text" id="option_url" style="width:33%"value="rtmp://a.rtmp.youtube.com/live2/cqg8-76xs-hztf-hfx7-9q5y" /><br><!-- RMTP YOUTUBE URL/KEY--><input class="form" type="checkbox" style="display:none" id="checkbox_Reconection" checked="true"><label class="form" style="display:none">Reconnection </label><br><div class="form">Connect the server, then start streaming.</div><br /><button class="form" id="button_server">Connect Server</button><button class="form" id="button_start">Start Streaming</button><button class="form" id="button_stop">Stop Streaming</button><br><p id="output_message"></p><textarea readonly="true" id="output_console" rows=15>Server Logs</textarea><br><div class="video"><video class="output_video" id="output_video" autoplay=true></video></div><br><script src="./index.js"></script>
</body></html>
js部分
var output_console = document.getElementById('output_console'),output_message = document.getElementById('output_message'),output_video = document.getElementById('output_video'),option_url = document.getElementById('option_url'),socketio_address = document.getElementById('socket.io_address'),option_width = document.getElementById('option_width'),option_height = document.getElementById('option_height'),option_framerate = document.getElementById('option_framerate'),option_bitrate = document.getElementById('option_bitrate'),button_start = document.getElementById('button_start'),height = parseInt(option_height.value),width = parseInt(option_width.value),framerate = parseInt(option_framerate.value),audiobitrate = parseInt(option_bitrate.value),url = option_url.value;option_height.onchange = option_height.onkeyup = function () { height = 1 * this.value; }
option_width.onchange = option_width.onkeyup = function () { width = 1 * this.value; console.log("width" + width); }
option_framerate.onchange = option_framerate.onkeyup = function () { framerate = 1 * this.value; console.log("framerate" + framerate); }
option_bitrate.onchange = option_bitrate.onkeyup = function () { audiobitrate = 1 * this.value; console.log("bitrate" + audiobitrate); }
option_url.onchange = option_url.onkeyup = function () { url = this.value; }
button_start.onclick = requestMedia;
button_server.onclick = connect_server;
var flagConnect = truevar mediaRecorder;
var socket;
var state = "stop";
console.log("state initiated = " + state);
var t;
button_start.disabled = true;
button_stop.disabled = true;
function connect_server() {navigator.getUserMedia = (navigator.mediaDevices.getUserMedia ||navigator.mediaDevices.mozGetUserMedia ||navigator.mediaDevices.msGetUserMedia ||navigator.mediaDevices.webkitGetUserMedia);if (!navigator.getUserMedia) { fail('No getUserMedia() available.'); }if (!MediaRecorder) { fail('No MediaRecorder available.'); }var socketOptions = { secure: true, reconnection: true, reconnectionDelay: 1000, timeout: 15000, pingTimeout: 15000, pingInterval: 45000, query: { framespersecond: framerate, audioBitrate: audiobitrate } };socket = io(socketOptions);socket.on('connect_timeout', (timeout) => {console.log("连接超时" + timeout);output_message.innerHTML = "Connection timed out";});socket.on('error', (error) => {console.log("state on connection error= " + error);output_message.innerHTML = "Connection error";});socket.on('connect_error', function () {console.log("连接错误" + state);});socket.on('message', function (m) {console.log("state on message= " + state + m);show_output('SERVER:' + m);});socket.on('fatal', function (m) {show_output('Fatal ERROR: unexpected:' + m);console.log("fatal socket error!!", m);console.log("state on fatal error= " + state);console.log('media recorder restarted');if (flagConnect) {output_message.innerHTML = "server is reload!";console.log("重置连接");}//should reload?});socket.on('flagConnect', function (m) {//this is the ffmpeg output for each frameshow_output('FFMPEG:' + m);console.log(m, '我是每一帧');});socket.on('disconnect', function (reason) {console.log("state disconec= " + state);show_output('ERROR: server disconnected!');console.log('失去连接' + reason);connect_server();if (flagConnect) {output_message.innerHTML = "重置";console.log("重置");}});state = "ready";console.log("state = " + state);button_start.disabled = false;button_stop.disabled = false;button_server.disabled = true;output_message.innerHTML = "Connecting local server...";
}
async function requestMedia() {var constraints = {audio: {sampleRate: audiobitrate,echoCancellation: true},video: {width: { min: 100, ideal: width, max: 1920 },height: { min: 100, ideal: height, max: 1080 },frameRate: { ideal: framerate }}}const stream = await navigator.mediaDevices.getUserMedia(constraints)video_show(stream)socket.emit('config_rtmpDestination', url);socket.emit('start', 'start');mediaRecorder = new MediaRecorder(stream);mediaRecorder.start(250)button_stop.disabled = false;button_start.disabled = true;button_server.disabled = true;var livestream = document.getElementsByClassName("Livestream");livestream.innerHtml = "test";mediaRecorder.onstop = function (e) {console.log("stopped!");console.log(e);}mediaRecorder.onpause = function (e) {console.log("media recorder paused!!");console.log(e);}mediaRecorder.onerror = function (event) {let error = event.error;console.log("error", error.name);};mediaRecorder.ondataavailable = function (e) {socket.emit("binarystream", e.data);state = "start";}
}
function video_show(stream) {console.log(stream, '111111');if ("srcObject" in output_video) {output_video.muted = true;output_video.srcObject = stream;} else {output_video.src = window.URL.createObjectURL(stream);}
}
function show_output(str) {output_console.value += "\n" + str;output_console.scrollTop = output_console.scrollHeight;
};以上代码分为 这三个方法
其中 以connect-server
先使用浏览器自带的 navigator.getUserMedia获取设备 并且将配置的属性传入socket配置中 这个方法就是对socket连接进行处理 包括处理服务器端连接过程通信的过程
requestMedia（） 获取媒体数据流 并且通过 socket.emit(“binarystream”, e.data);传递给后台
const stream = await navigator.mediaDevices.getUserMedia(constraints)
实例
下周
目前弄了一个分片上传 下周弄完之后可以分享分享