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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>多码率转播-WS-FLV</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script type="text/javascript" charset="utf-8" src="/aliplayer-min.js"></script>
<link rel="stylesheet" href="/aliplayer-min.css">
<style>
:root { --bg:#0f0f1a; --card:#1a1a2e; --accent:#4cc9f0; --danger:#f72585; --success:#06d6a0; --text:#e0e0e0; --muted:#888; --border:#2a2a3e; --warning:#ff9f1c; }
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif; background:var(--bg); color:var(--text); min-height:100vh; display:flex; align-items:center; justify-content:center; padding:20px; }
.container { width:100%; max-width:900px; background:var(--card); border-radius:16px; padding:30px; box-shadow:0 20px 60px rgba(0,0,0,0.5); }
.header { display:flex; align-items:center; justify-content:space-between; margin-bottom:20px; flex-wrap:wrap; gap:12px; }
.title { font-size:1.4em; font-weight:600; display:flex; align-items:center; gap:10px; }
.dot { width:10px; height:10px; border-radius:50%; background:var(--muted); }
.dot.live { background:var(--danger); animation:pulse 1.5s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.3} }
.btn { padding:10px 22px; border:none; border-radius:8px; font-size:0.95em; font-weight:500; cursor:pointer; display:inline-flex; align-items:center; gap:6px; }
.btn-start { background:var(--accent); color:#000; } .btn-stop { background:var(--danger); color:#fff; }
.btn:disabled { opacity:0.4; cursor:not-allowed; }
.input-group { margin-bottom:16px; }
.input-group label { display:block; font-size:0.85em; color:var(--muted); margin-bottom:6px; }
.input-group input { width:100%; padding:8px 12px; border-radius:6px; border:1px solid var(--border); background:var(--bg); color:var(--text); font-size:0.9em; }
.preview-wrap { background:#000; border-radius:12px; overflow:hidden; margin-bottom:20px; border:2px solid var(--border); position:relative; }
.preview-wrap canvas { width:100%; display:block; max-height:400px; }
.overlay { position:absolute; bottom:12px; left:12px; background:rgba(0,0,0,0.7); color:var(--danger); padding:4px 10px; border-radius:4px; font-size:0.75em; display:none; }
.overlay.show { display:block; }
.stats { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin-bottom:20px; }
.stat-card { background:rgba(255,255,255,0.03); border:1px solid var(--border); border-radius:10px; padding:14px; text-align:center; }
.stat-card .value { font-size:1.6em; font-weight:700; font-family:monospace; }
.stat-card .label { font-size:0.75em; color:var(--muted); margin-top:4px; }
.value.video { color:var(--accent); } .value.audio { color:var(--success); } .value.time { color:#ff9f1c; }
.settings { display:flex; gap:16px; flex-wrap:wrap; padding:16px; background:rgba(255,255,255,0.02); border:1px solid var(--border); border-radius:10px; margin-bottom:20px; }
.setting { display:flex; align-items:center; gap:8px; }
.setting label { font-size:0.85em; color:var(--muted); }
.setting select { padding:6px 10px; border-radius:6px; border:1px solid var(--border); background:var(--bg); color:var(--text); }
.log-panel { background:#000; border:1px solid var(--border); border-radius:10px; padding:12px; max-height:180px; overflow-y:auto; font-family:monospace; font-size:0.7em; color:#aaa; }
.log-warn { color:#ff9f1c; } .log-error { color:#f72585; } .log-success { color:#06d6a0; }
.tip-box { font-size:10px; color:#555; text-align:center; margin-top:10px; }
.tip-box span:first-child { margin-right:4px; }
</style>
</head>
<body>
<div class="container">
<div class="header">
<div class="title"><span class="dot" id="statusDot"></span>多码率转播</div>
<div>
<button class="btn btn-start" id="startBtn" onclick="startRelay()">▶ 开始转推</button>
<button class="btn btn-stop" id="stopBtn" onclick="stopRelay()" disabled>■ 停止</button>
</div>
</div>
<div class="input-group">
<label>拉流地址 (WS-FLV)</label>
<input type="text" id="pullUrl" value="ws://127.0.0.1:8501/a/b.flv">
</div>
<div class="input-group" style="margin-bottom:20px;">
<label>推流目标地址 (WS)</label>
<input type="text" id="pushUrl" value="ws://127.0.0.1:8501/a/c" style="width:100%;">
</div>
<!-- 调试预览窗口（隐藏） -->
<div id="debugPreview" style="margin-bottom:20px; display:none;">
<div class="preview-wrap">
<div id="player" style="width:100%; height:240px;"></div>
<div class="overlay" id="overlay">原始流预览</div>
</div>
</div>
<div class="preview-wrap">
<canvas id="mixCanvas" width="854" height="480"></canvas>
<div class="overlay" id="liveBadge">🔴 LIVE 转推输出</div>
</div>
<div class="stats">
<div class="stat-card"><div class="value video" id="videoCount">0</div><div class="label">视频帧</div></div>
<div class="stat-card"><div class="value audio" id="audioCount">0</div><div class="label">音频帧</div></div>
<div class="stat-card"><div class="value time" id="elapsedTime">00:00</div><div class="label">时长</div></div>
<div class="stat-card"><div class="value" style="color:#fff;" id="bitrate">0</div><div class="label">kbps</div></div>
</div>
<div class="settings">
<div class="setting"><label>分辨率</label><select id="resSelect"><option value="480x360">480×360</option><option value="640x480">640×480</option><option value="854x480" selected>854×480</option><option value="1280x720">1280×720</option><option value="1920x1080">1920×1080</option></select></div>
<div class="setting"><label>帧率</label><select id="fpsSelect"><option value="15">15</option><option value="20">20</option><option value="25" selected>25</option><option value="30">30</option></select></div>
<div class="setting"><label>码率</label><select id="bitrateSelect"><option value="200">200k</option><option value="300">300k</option><option value="500">500k</option><option value="800">800k</option><option value="1000" selected>1000k</option><option value="1500">1500k</option><option value="2000">2000k</option><option value="2500">2500k</option><option value="3000">3000k</option><option value="4000">4000k</option></select></div>
</div>
<div class="log-panel" id="logPanel"></div>
<div class="tip-box">
<span>💡</span>
<span>本页面旨在提供一个直播转码思路：通过前端 Web 页面实现低成本直播转码，可任意设置不同码率推流，无需专用硬件芯片和软件</span>
</div>
<div style="margin-top:30px;padding:12px 0;text-align:center;font-size:12px;color:#6a6a7a;border-top:1px solid rgba(255,255,255,0.06);">
本页面由 <strong style="color:#6c8cff;"><a href="https://github.com/2723659854/rtmp-server" style="color: white">xiaosongshu/rtmp-server</a></strong> 提供
</div>
</div>
<script>
// ==================== 全局变量 ====================
const KEYFRAME_INTERVAL = 15;
let player = null;
let videoEl = null;
let canvas, ctx, animFrameId = null;
let audioCtx = null, audioDest = null;
let ws = null, videoEncoder = null, audioEncoder = null;
let isPushing = false;
let avcConfigSent = false, aacConfigSent = false, metaSent = false;
let videoChunkCount = 0, audioChunkCount = 0;
let totalBytes = 0, statsTimer;
let WIDTH = 854, HEIGHT = 480, FPS = 25, BITRATE = 1000000;
let streamStartPerf = 0;
let videoFrameIndex = 0, audioFrameIndex = 0;
let SAMPLE_RATE = 48000;
let canvasStream = null;
let videoReader = null;
let audioReader = null;
let canvasRenderReady = false;
// ==================== 日志 ====================
function log(msg, level = 'info') {
const t = new Date().toLocaleTimeString();
const p = document.getElementById('logPanel');
const css = level === 'warn' ? 'log-warn' : level === 'error' ? 'log-error' : level === 'success' ? 'log-success' : '';
p.innerHTML += `<div><span style="color:#555">${t}</span> <span class="${css}">${msg}</span></div>`;
p.scrollTop = p.scrollHeight;
}
// ==================== UI 更新 ====================
function updateConfig() {
const [w, h] = document.getElementById('resSelect').value.split('x');
WIDTH = +w; HEIGHT = +h;
FPS = +document.getElementById('fpsSelect').value;
BITRATE = +document.getElementById('bitrateSelect').value * 1000;
if(canvas){
canvas.width = WIDTH;
canvas.height = HEIGHT;
}
}
function updateStats() {
document.getElementById('videoCount').textContent = videoChunkCount;
document.getElementById('audioCount').textContent = audioChunkCount;
if (streamStartPerf > 0) {
const sec = Math.floor((performance.now() - streamStartPerf) / 1000);
document.getElementById('elapsedTime').textContent =
`${String(Math.floor(sec/60)).padStart(2,'0')}:${String(sec%60).padStart(2,'0')}`;
if (sec > 0) document.getElementById('bitrate').textContent =
Math.floor(totalBytes * 8 / sec / 1000);
}
}
function setStatus(live) {
document.getElementById('statusDot').className = 'dot' + (live ? ' live' : '');
document.getElementById('liveBadge').className = 'overlay' + (live ? ' show' : '');
}
// ==================== FLV 封装发送 ====================
function sendTag(type, payload, timestampMs) {
if (!isPushing || !ws || ws.readyState !== WebSocket.OPEN) return;
const size = payload.length;
const tag = new Uint8Array(11 + size + 4);
tag[0] = type;
tag[1] = (size >> 16) & 0xFF;
tag[2] = (size >> 8) & 0xFF;
tag[3] = size & 0xFF;
const ts = Math.floor(timestampMs);
tag[4] = (ts >> 16) & 0xFF;
tag[5] = (ts >> 8) & 0xFF;
tag[6] = ts & 0xFF;
tag[7] = (ts >> 24) & 0xFF;
tag[8] = 0; tag[9] = 0; tag[10] = 0;
tag.set(payload, 11);
const prevTagSize = 11 + size;
tag[prevTagSize] = (prevTagSize >> 24) & 0xFF;
tag[prevTagSize+1] = (prevTagSize >> 16) & 0xFF;
tag[prevTagSize+2] = (prevTagSize >> 8) & 0xFF;
tag[prevTagSize+3] = prevTagSize & 0xFF;
ws.send(tag);
totalBytes += tag.length;
}
function sendFlvHeader() {
if (!ws || ws.readyState !== WebSocket.OPEN) return;
ws.send(new Uint8Array([0x46,0x4C,0x56,0x01,0x05,0x00,0x00,0x00,0x09,0x00,0x00,0x00,0x00]));
}
function sendMetaData() {
if (metaSent || !isPushing) return;
metaSent = true;
function n2b(n) { const a = new Uint8Array(8); new DataView(a.buffer).setFloat64(0, n, false); return Array.from(a); }
function s2b(s) { return Array.from(new TextEncoder().encode(s)); }
const meta = [
['duration', 0], ['width', WIDTH], ['height', HEIGHT],
['videocodecid', 7], ['audiocodecid', 10],
['audiosamplerate', SAMPLE_RATE], ['audiosamplesize', 16],
['stereo', true], ['filesize', 0], ['framerate', FPS]
];
const buf = [];
buf.push(0x02, 0x00, 0x0A, ...s2b('onMetaData'), 0x03);
for (const [k, v] of meta) {
buf.push((k.length >> 8) & 0xFF, k.length & 0xFF, ...s2b(k));
if (typeof v === 'number') buf.push(0x00, ...n2b(v));
else if (typeof v === 'boolean') buf.push(0x01, v ? 1 : 0);
}
buf.push(0x00, 0x00, 0x09);
sendTag(0x12, new Uint8Array(buf), 0);
log('发送FLV MetaData标签', 'success');
}
function sendAACConfig(desc) {
if (aacConfigSent || !desc || !isPushing) return;
aacConfigSent = true;
const d = new Uint8Array(desc);
const b = new Uint8Array(2 + d.length);
b[0] = 0xAF; b[1] = 0x00; b.set(d, 2);
sendTag(8, b, 0);
log('发送AAC序列配置头', 'success');
}
function sendAvcSequenceHeader(desc) {
if (avcConfigSent || !isPushing) return;
avcConfigSent = true;
const b = new Uint8Array(5 + desc.length);
b[0] = 0x17; b[1] = 0x00; b[2] = 0; b[3] = 0; b[4] = 0;
b.set(new Uint8Array(desc), 5);
sendTag(9, b, 0);
log('发送AVC SPS/PPS序列头', 'success');
}
function buildVideoBody(data, isKey) {
const b = new Uint8Array(5 + data.length);
b[0] = isKey ? 0x17 : 0x27;
b[1] = 0x01; b[2] = 0; b[3] = 0; b[4] = 0;
b.set(data, 5);
return b;
}
function buildAudioBody(data) {
const b = new Uint8Array(2 + data.length);
b[0] = 0xAF; b[1] = 0x01;
b.set(data, 2);
return b;
}
// ==================== 拉流 ====================
function initPlayer() {
return new Promise((resolve, reject) => {
const pullUrl = document.getElementById('pullUrl').value.trim();
if (!pullUrl) return reject(new Error('请输入拉流地址'));
if (player) { try { player.dispose(); } catch(e) {} }
let playerReady = false;
let videoPlaying = false;
const checkReady = () => {
if (playerReady && videoPlaying) {
if (!videoEl) {
reject(new Error('无法获取播放器 video 元素'));
} else {
videoEl.muted = false;
log('流已就绪并开始播放', 'success');
resolve();
}
}
};
const checkVideoPlaying = (video) => {
const checkInterval = setInterval(() => {
if (video && video.readyState >= 2 && video.videoWidth > 0) {
clearInterval(checkInterval);
videoPlaying = true;
log(`开始播放: ${video.videoWidth}x${video.videoHeight}`, 'success');
checkReady();
}
}, 100);
setTimeout(() => {
clearInterval(checkInterval);
if (!videoPlaying) {
log('播放超时', 'warn');
}
}, 10000);
};
player = new Aliplayer({
id: 'player',
source: pullUrl,
width: '100%',
height: '100%',
autoplay: true,
isLive: true,
muted: false,
playsinline: true,
preload: 'auto',
useH5Prism: true,
controlBarVisibility: 'hover',
showBarTime: 3000
}, () => {
log('播放器已就绪', 'success');
playerReady = true;
videoEl = document.querySelector('#player video');
checkVideoPlaying(videoEl);
});
player.on('error', (e) => {
log(`播放错误: ${e?.message || e}`, 'error');
reject(new Error(`播放错误: ${e?.message || e}`));
});
});
}
function setupCanvasDraw() {
canvas = document.getElementById('mixCanvas');
canvas.width = WIDTH;
canvas.height = HEIGHT;
ctx = canvas.getContext('2d');
canvasRenderReady = true;
let intervalId = null;
function draw() {
ctx.fillStyle = "#000000";
ctx.fillRect(0,0,WIDTH,HEIGHT);
try{
if(videoEl && videoEl.readyState >= 2 && videoEl.videoWidth > 0){
// 保持原始比例居中显示，避免拉伸变形
const vw = videoEl.videoWidth;
const vh = videoEl.videoHeight;
const videoRatio = vw / vh;
const canvasRatio = WIDTH / HEIGHT;
let drawW, drawH, offsetX, offsetY;
if (videoRatio > canvasRatio) {
// 视频更宽，按宽度适配，上下留黑边
drawW = WIDTH;
drawH = WIDTH / videoRatio;
offsetX = 0;
offsetY = (HEIGHT - drawH) / 2;
} else {
// 视频更高（竖屏），按高度适配，左右留黑边
drawH = HEIGHT;
drawW = HEIGHT * videoRatio;
offsetX = (WIDTH - drawW) / 2;
offsetY = 0;
}
ctx.drawImage(videoEl, offsetX, offsetY, drawW, drawH);
}else{
ctx.fillStyle = "#666";
ctx.font = "16px Arial";
ctx.textAlign = "center";
ctx.fillText("等待流...", WIDTH/2, HEIGHT/2);
}
}catch(e){
console.error('画布绘制错误:', e);
}
}
function loop() {
draw();
animFrameId = requestAnimationFrame(loop);
}
function startLoop() {
if (intervalId) { clearInterval(intervalId); intervalId = null; }
if (animFrameId) { cancelAnimationFrame(animFrameId); }
loop();
}
function startInterval() {
if (animFrameId) { cancelAnimationFrame(animFrameId); animFrameId = null; }
if (intervalId) { clearInterval(intervalId); }
intervalId = setInterval(draw, 1000 / FPS);
}
document.addEventListener('visibilitychange', () => {
if (document.hidden) {
log('页面进入后台，切换为定时渲染', 'warn');
startInterval();
} else {
log('页面恢复前台，切换为动画帧渲染', 'info');
startLoop();
}
});
startLoop();
log('画布渲染循环启动（已启用后台保持）', 'info');
}
function setupAudio() {
if (!audioCtx) audioCtx = new (window.AudioContext || window.webkitAudioContext)();
if(audioCtx.state === 'suspended') audioCtx.resume();
audioDest = audioCtx.createMediaStreamDestination();
const source = audioCtx.createMediaElementSource(videoEl);
const gain = audioCtx.createGain();
gain.gain.value = 0.8;
source.connect(gain).connect(audioDest);
gain.connect(audioCtx.destination);
log('音频通道已建立', 'info');
}
// ==================== 编码推流 ====================
async function startEncoding() {
updateConfig();
videoChunkCount = 0; audioChunkCount = 0; totalBytes = 0;
avcConfigSent = false; aacConfigSent = false; metaSent = false;
videoFrameIndex = 0; audioFrameIndex = 0;
streamStartPerf = performance.now();
videoReader = null;
audioReader = null;
const pushUrl = document.getElementById('pushUrl').value.trim();
ws = new WebSocket(pushUrl);
ws.binaryType = 'arraybuffer';
ws.onopen = async () => {
log('推流WebSocket连接成功', 'success');
isPushing = true;
document.getElementById('startBtn').disabled = true;
document.getElementById('stopBtn').disabled = false;
setStatus(true);
statsTimer = setInterval(updateStats, 500);
sendFlvHeader();
sendMetaData();
if(canvasStream) canvasStream.getTracks().forEach(t=>t.stop());
canvasStream = canvas.captureStream(FPS);
const videoTrack = canvasStream.getVideoTracks()[0];
videoEncoder = new VideoEncoder({
output(chunk, meta) {
if (!isPushing) return;
const data = new Uint8Array(chunk.byteLength);
chunk.copyTo(data);
if (meta?.decoderConfig?.description && !avcConfigSent) {
sendAvcSequenceHeader(new Uint8Array(meta.decoderConfig.description));
}
if (data.length > 0) {
videoChunkCount++;
const dts = videoFrameIndex * (1000 / FPS);
sendTag(9, buildVideoBody(data, chunk.type === 'key'), dts);
videoFrameIndex++;
}
},
error(e) { log(`视频编码错误: ${e.message}`, 'error'); }
});
// 根据分辨率动态选择 AVC level
// level 3.1 (31=0x1F): 最大约1280x720
// level 4.0 (32=0x28): 支持1920x1080
// level 4.1 (33=0x29): 支持更高分辨率
const pixels = WIDTH * HEIGHT;
let avcLevel;
if (pixels <= 921600) {
avcLevel = '1F'; // level 3.1
} else if (pixels <= 2073600) {
avcLevel = '28'; // level 4.0
} else {
avcLevel = '29'; // level 4.1
}
const codecStr = `avc1.4200${avcLevel}`;
videoEncoder.configure({
codec: codecStr,
width: WIDTH,
height: HEIGHT,
bitrate: BITRATE,
framerate: FPS,
latencyMode: 'realtime',
bitrateMode: 'constant',
rcQuota: { qMin: 10, qMax: 51 },
maxFramerate: FPS
});
log(`视频编码器配置完成 ${WIDTH}x${HEIGHT} ${FPS}fps`, 'success');
log(`canvasRenderReady状态: ${canvasRenderReady}`, 'info');
const audioTrack = audioDest.stream.getAudioTracks()[0];
if (audioTrack) {
const audioSettings = audioTrack.getSettings();
SAMPLE_RATE = audioSettings.sampleRate || 48000;
audioEncoder = new AudioEncoder({
output(chunk, meta) {
if (!isPushing) return;
if (meta?.decoderConfig?.description && !aacConfigSent) {
sendAACConfig(meta.decoderConfig.description);
}
const data = new Uint8Array(chunk.byteLength);
chunk.copyTo(data);
if (data.length > 0) {
audioChunkCount++;
const frameDurationMs = (1024 / SAMPLE_RATE) * 1000;
const dts = audioFrameIndex * frameDurationMs;
sendTag(8, buildAudioBody(data), dts);
audioFrameIndex++;
}
},
error(e) { log(`音频编码错误: ${e.message}`, 'error'); }
});
audioEncoder.configure({
codec: 'mp4a.40.2',
sampleRate: SAMPLE_RATE,
numberOfChannels: Math.min(audioSettings.channelCount || 1, 2),
bitrate: 96000
});
log(`音频编码器: ${SAMPLE_RATE}Hz ${Math.min(audioSettings.channelCount,2)}ch`, 'info');
}
log('开始读取视频帧', 'success');
const vp = new MediaStreamTrackProcessor({ track: videoTrack });
videoReader = vp.readable.getReader();
let fc = 0, lkf = -KEYFRAME_INTERVAL;
log('开始采集视频帧', 'info');
(async function readVideo() {
while (isPushing) {
try {
const { done, value } = await videoReader.read();
if (done) { log('视频轨道结束', 'info'); break; }
if (videoEncoder && videoEncoder.state === 'configured') {
const isKey = (fc - lkf >= KEYFRAME_INTERVAL) || fc === 0;
videoEncoder.encode(value, { keyFrame: isKey });
if (isKey) lkf = fc;
fc++;
}
value.close();
} catch (e) { if (isPushing) log(`视频读取异常: ${e.message}`, 'error'); break; }
}
})();
if (audioTrack) {
const ap = new MediaStreamTrackProcessor({ track: audioTrack });
audioReader = ap.readable.getReader();
(async function readAudio() {
log('开始采集音频帧', 'info');
while (isPushing) {
try {
const { done, value } = await audioReader.read();
if (done) { log('音频轨道结束', 'info'); break; }
if (audioEncoder && audioEncoder.state === 'configured') {
audioEncoder.encode(value);
}
value.close();
} catch (e) { if (isPushing) log(`音频读取异常: ${e.message}`, 'error'); break; }
}
})();
}
};
ws.onerror = () => { log('WebSocket 连接错误', 'error'); stopRelay(); };
ws.onclose = (e) => { log(`WebSocket 关闭 (code:${e.code})`, 'warn'); if (isPushing) stopRelay(); };
}
// ==================== 开始 / 停止 ====================
async function startRelay() {
if (isPushing) return;
try {
log('正在拉取流...', 'info');
await initPlayer();
setupCanvasDraw();
setupAudio();
log('转推初始化完成，建立推流连接...', 'success');
await startEncoding();
} catch (err) {
log(`启动失败: ${err.message}`, 'error');
await stopRelay();
}
}
async function stopRelay() {
if (!isPushing && !player) return;
log('正在停止转推，释放资源...', 'warn');
isPushing = false;
if(videoReader){ try{ await videoReader.cancel(); }catch(e){} videoReader = null; }
if(audioReader){ try{ await audioReader.cancel(); }catch(e){} audioReader = null; }
if (videoEncoder && videoEncoder.state !== 'closed') {
try { await videoEncoder.flush(); } catch(e) {}
try { videoEncoder.close(); } catch(e) {}
videoEncoder = null;
}
if (audioEncoder && audioEncoder.state !== 'closed') {
try { await audioEncoder.flush(); } catch(e) {}
try { audioEncoder.close(); } catch(e) {}
audioEncoder = null;
}
if(canvasStream){
canvasStream.getTracks().forEach(track=>track.stop());
canvasStream = null;
}
if (statsTimer) { clearInterval(statsTimer); statsTimer = null; }
if (animFrameId) { cancelAnimationFrame(animFrameId); animFrameId = null; }
if (audioCtx) {
try { await audioCtx.close(); } catch(e) {}
audioCtx = null;
audioDest = null;
}
if (ws) { try { ws.close(1000, "stop"); } catch(e) {} ws = null; }
if (player) { try { player.dispose(); } catch(e) {} player = null; videoEl = null; }
document.getElementById('startBtn').disabled = false;
document.getElementById('stopBtn').disabled = true;
setStatus(false);
updateStats();
log('所有资源已释放，停止完成', 'warn');
}
document.getElementById('resSelect').addEventListener('change', ()=>{
if(!isPushing) updateConfig();
else log('推流中切换分辨率需重启推流生效', 'warn');
});
window.addEventListener('beforeunload', async (e) => {
if (isPushing) {
e.preventDefault();
await stopRelay();
}
});
log('就绪，请填入 WS-FLV 拉流地址及推流目标地址，点击开始转推', 'info');
</script>
</body>
</html>