4kaudio / m2provisuals.html

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	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>4K Transparent Audio Visualizer</title>

	<script src="https://cdn.tailwindcss.com"></script>

	<script src="https://unpkg.com/react@18/umd/react.production.min.js" crossorigin></script>
	<script src="https://unpkg.com/react-dom@18/umd/react-dom.production.min.js" crossorigin></script>

	<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>

	<style>
	body { margin: 0; padding: 0; background-color: #020617; color: #e2e8f0; }
	/* Custom scrollbar for webkit */
	::-webkit-scrollbar { width: 8px; }
	::-webkit-scrollbar-track { background: #0f172a; }
	::-webkit-scrollbar-thumb { background: #334155; border-radius: 4px; }
	::-webkit-scrollbar-thumb:hover { background: #475569; }
	</style>
	</head>
	<body>
	<div id="root"></div>

	<script type="text/babel">
	const { useState, useRef, useEffect, useCallback } = React;

	// --- Native SVG Icons ---
	const Upload = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="17 8 12 3 7 8"/><line x1="12" y1="3" x2="12" y2="15"/></svg>;
	const Play = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><polygon points="5 3 19 12 5 21 5 3"/></svg>;
	const Pause = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><rect x="6" y="4" width="4" height="16"/><rect x="14" y="4" width="4" height="16"/></svg>;
	const ImageIcon = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21 15 16 10 5 21"/></svg>;
	const Video = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><polygon points="23 7 16 12 23 17 23 7"/><rect x="1" y="5" width="15" height="14" rx="2" ry="2"/></svg>;
	const Settings2 = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><circle cx="12" cy="12" r="3"/><path d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 0 1 0 2.83 2 2 0 0 1-2.83 0l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-2 2 2 2 0 0 1-2-2v-.09A1.65 1.65 0 0 0 9 19.4a1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 0 1-2.83 0 2 2 0 0 1 0-2.83l.06-.06a1.65 1.65 0 0 0 .33-1.82 1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1-2-2 2 2 0 0 1 2-2h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 0 1 0-2.83 2 2 0 0 1 2.83 0l.06.06a1.65 1.65 0 0 0 1.82.33H9a1.65 1.65 0 0 0 1-1.51V3a2 2 0 0 1 2-2 2 2 0 0 1 2 2v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 0 1 2.83 0 2 2 0 0 1 0 2.83l-.06.06a1.65 1.65 0 0 0-.33 1.82V9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 0 1 2 2 2 2 0 0 1-2 2h-.09a1.65 1.65 0 0 0-1.51 1z"/></svg>;
	const Loader2 = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M21 12a9 9 0 1 1-6.219-8.56"/></svg>;
	const StopCircle = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><circle cx="12" cy="12" r="10"/><rect x="9" y="9" width="6" height="6"/></svg>;
	const Sparkles = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="m12 3-1.912 5.813a2 2 0 0 1-1.275 1.275L3 12l5.813 1.912a2 2 0 0 1 1.275 1.275L12 21l1.912-5.813a2 2 0 0 1 1.275-1.275L21 12l-5.813-1.912a2 2 0 0 1-1.275-1.275L12 3Z"/><path d="M5 3v4"/><path d="M19 17v4"/><path d="M3 5h4"/><path d="M17 19h4"/></svg>;
	const Monitor = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><rect x="2" y="3" width="20" height="14" rx="2" ry="2"/><line x1="8" y1="21" x2="16" y2="21"/><line x1="12" y1="17" x2="12" y2="21"/></svg>;
	const ImagePlus = ({className}) => <svg className={className} xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M21 11.5V19a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h7.5"/><path d="m21 15-3.086-3.086a2 2 0 0 0-2.828 0L6 21"/><circle cx="9" cy="9" r="2"/><path d="M19 3v6"/><path d="M16 6h6"/></svg>;

	function App() {
	const canvasRef = useRef(null);
	const audioRef = useRef(null);
	const audioCtxRef = useRef(null);
	const analyserRef = useRef(null);
	const sourceRef = useRef(null);
	const destRef = useRef(null);
	const reqIdRef = useRef(null);
	const mediaRecorderRef = useRef(null);
	const chunksRef = useRef([]);
	const bgImgRef = useRef(null);

	// Pre-allocate audio data array to prevent memory leaks during export
	const dataArrayRef = useRef(new Uint8Array(2048));
	const lastDrawTimeRef = useRef(0); // NEW: Throttling timer

	// State
	const [audioSrc, setAudioSrc] = useState(null);
	const [fileName, setFileName] = useState('');
	const [isPlaying, setIsPlaying] = useState(false);
	const [isExportingVideo, setIsExportingVideo] = useState(false);
	const [exportProgress, setExportProgress] = useState(0);

	// Audio Player State
	const [audioTime, setAudioTime] = useState(0);
	const [audioDuration, setAudioDuration] = useState(0);

	// Settings
	const [vizType, setVizType] = useState('bars'); // 'bars', 'wave', 'circle'
	const [color, setColor] = useState('#00ffcc');
	const [thickness, setThickness] = useState(12);
	const [spacing, setSpacing] = useState(8);
	const [sensitivity, setSensitivity] = useState(1.5);
	const [smoothing, setSmoothing] = useState(0.85);

	// Transform Settings
	const [offsetX, setOffsetX] = useState(0);
	const [offsetY, setOffsetY] = useState(0);
	const [scale, setScale] = useState(1.0);
	const [rotation, setRotation] = useState(0);

	// Drag State
	const [isDragging, setIsDragging] = useState(false);
	const dragRef = useRef({ startX: 0, startY: 0, initX: 0, initY: 0 });

	// Advanced Settings
	const [colorMode, setColorMode] = useState('solid');
	const [color2, setColor2] = useState('#b829ff');
	const [glow, setGlow] = useState(false);
	const [resolution, setResolution] = useState('4k_16_9');
	const [bgType, setBgType] = useState('transparent');
	const [bgColor, setBgColor] = useState('#000000');
	const [bgImageSrc, setBgImageSrc] = useState(null);
	const [exportFormat, setExportFormat] = useState('mp4');
	const [exportFps, setExportFps] = useState(30); // NEW: Framerate control to fix freezing

	const RESOLUTIONS = {
	'4k_16_9': { w: 3840, h: 2160, label: '4K (16:9)', isVertical: false },
	'1080p_16_9': { w: 1920, h: 1080, label: '1080p (16:9)', isVertical: false },
	'4k_9_16': { w: 2160, h: 3840, label: '4K Vertical (9:16)', isVertical: true },
	'1080p_9_16': { w: 1080, h: 1920, label: '1080p Vertical (9:16)', isVertical: true }
	};

	useEffect(() => {
	if (bgImageSrc) {
	const img = new Image();
	img.onload = () => { bgImgRef.current = img; };
	img.src = bgImageSrc;
	} else {
	bgImgRef.current = null;
	}
	}, [bgImageSrc]);

	const handleBgUpload = (e) => {
	const file = e.target.files[0];
	if (file) {
	if (bgImageSrc) URL.revokeObjectURL(bgImageSrc);
	setBgImageSrc(URL.createObjectURL(file));
	setBgType('image');
	}
	};

	const initAudio = useCallback(() => {
	if (!audioCtxRef.current) {
	const AudioContext = window.AudioContext \|\| window.webkitAudioContext;
	audioCtxRef.current = new AudioContext();
	analyserRef.current = audioCtxRef.current.createAnalyser();
	destRef.current = audioCtxRef.current.createMediaStreamDestination();

	if (!sourceRef.current && audioRef.current) {
	sourceRef.current = audioCtxRef.current.createMediaElementSource(audioRef.current);
	sourceRef.current.connect(analyserRef.current);
	analyserRef.current.connect(audioCtxRef.current.destination);
	analyserRef.current.connect(destRef.current);
	}
	}

	if (audioCtxRef.current.state === 'suspended') {
	audioCtxRef.current.resume();
	}
	}, []);

	const handleFileUpload = (e) => {
	const file = e.target.files[0];
	if (file) {
	if (audioSrc) URL.revokeObjectURL(audioSrc);
	const url = URL.createObjectURL(file);
	setAudioSrc(url);
	setFileName(file.name);
	setIsPlaying(false);
	setAudioTime(0);
	if (audioRef.current) {
	audioRef.current.pause();
	audioRef.current.currentTime = 0;
	}
	}
	};

	const togglePlay = () => {
	if (!audioSrc) return;
	initAudio();

	if (isPlaying) {
	audioRef.current.pause();
	} else {
	audioRef.current.play();
	}
	setIsPlaying(!isPlaying);
	};

	const handleTimeUpdate = () => {
	if (audioRef.current) setAudioTime(audioRef.current.currentTime);
	};

	const handleLoadedMetadata = () => {
	if (audioRef.current) setAudioDuration(audioRef.current.duration);
	};

	const handleSeek = (e) => {
	const time = Number(e.target.value);
	if (audioRef.current) audioRef.current.currentTime = time;
	setAudioTime(time);
	};

	const formatTime = (time) => {
	if (isNaN(time)) return "0:00";
	const m = Math.floor(time / 60);
	const s = Math.floor(time % 60).toString().padStart(2, '0');
	return `${m}:${s}`;
	};

	const handleMouseDown = (e) => {
	setIsDragging(true);
	dragRef.current = {
	startX: e.clientX,
	startY: e.clientY,
	initX: offsetX,
	initY: offsetY
	};
	};

	const handleMouseMove = (e) => {
	if (!isDragging \|\| !canvasRef.current) return;
	const rect = canvasRef.current.getBoundingClientRect();

	const deltaX = e.clientX - dragRef.current.startX;
	const deltaY = e.clientY - dragRef.current.startY;

	const percentX = (deltaX / rect.width) * 100;
	const percentY = (deltaY / rect.height) * 100;

	setOffsetX(Math.max(-50, Math.min(50, dragRef.current.initX + percentX)));
	setOffsetY(Math.max(-50, Math.min(50, dragRef.current.initY + percentY)));
	};

	const handleMouseUpOrLeave = () => {
	setIsDragging(false);
	};

	const draw = useCallback(() => {
	if (!canvasRef.current \|\| !analyserRef.current) {
	reqIdRef.current = requestAnimationFrame(draw);
	return;
	}

	// NEW: Render throttling during export to prevent GPU/Encoder crashes
	const now = performance.now();
	if (isExportingVideo && exportFps < 60) {
	const msPerFrame = 1000 / exportFps;
	if (now - lastDrawTimeRef.current < msPerFrame) {
	reqIdRef.current = requestAnimationFrame(draw);
	return;
	}
	}
	lastDrawTimeRef.current = now;

	const canvas = canvasRef.current;

	// MODIFIED: Added desynchronized and willReadFrequently to force maximum GPU/Metal usage on Mac
	const ctx = canvas.getContext('2d', {
	alpha: bgType === 'transparent',
	desynchronized: true,
	willReadFrequently: false
	});

	const res = RESOLUTIONS[resolution] \|\| RESOLUTIONS['4k_16_9'];

	if (canvas.width !== res.w \|\| canvas.height !== res.h) {
	canvas.width = res.w;
	canvas.height = res.h;
	}

	const width = canvas.width;
	const height = canvas.height;

	ctx.clearRect(0, 0, width, height);

	// Draw Background
	if (bgType === 'color') {
	ctx.fillStyle = bgColor;
	ctx.fillRect(0, 0, width, height);
	} else if (bgType === 'image' && bgImgRef.current) {
	const img = bgImgRef.current;
	const imgRatio = img.width / img.height;
	const canvasRatio = width / height;
	let drawW, drawH, drawX, drawY;
	if (imgRatio > canvasRatio) {
	drawH = height;
	drawW = height * imgRatio;
	drawX = (width - drawW) / 2;
	drawY = 0;
	} else {
	drawW = width;
	drawH = width / imgRatio;
	drawX = 0;
	drawY = (height - drawH) / 2;
	}
	ctx.drawImage(img, drawX, drawY, drawW, drawH);
	}

	// Get Audio Data
	analyserRef.current.smoothingTimeConstant = smoothing;
	analyserRef.current.fftSize = 2048;

	const bufferLength = analyserRef.current.frequencyBinCount;
	const dataArray = dataArrayRef.current; // Use pre-allocated array to save memory/GC pauses

	if (vizType === 'bars' \|\| vizType === 'circle') {
	analyserRef.current.getByteFrequencyData(dataArray);
	} else if (vizType === 'wave') {
	analyserRef.current.getByteTimeDomainData(dataArray);
	}

	ctx.save();

	// Apply Transformations
	const centerX = width / 2 + (width * (offsetX / 100));
	const centerY = height / 2 + (height * (offsetY / 100));
	ctx.translate(centerX, centerY);
	ctx.scale(scale, scale);
	ctx.rotate((rotation * Math.PI) / 180);

	// Set Colors
	let activeColor = color;
	if (colorMode === 'gradient') {
	const grad = ctx.createLinearGradient(-width/2, -height/2, width/2, height/2);
	grad.addColorStop(0, color);
	grad.addColorStop(1, color2);
	activeColor = grad;
	} else if (colorMode === 'rainbow') {
	const grad = ctx.createLinearGradient(-width/2, 0, width/2, 0);
	grad.addColorStop(0, '#ff0000');
	grad.addColorStop(0.16, '#ffff00');
	grad.addColorStop(0.33, '#00ff00');
	grad.addColorStop(0.5, '#00ffff');
	grad.addColorStop(0.66, '#0000ff');
	grad.addColorStop(0.83, '#ff00ff');
	grad.addColorStop(1, '#ff0000');
	activeColor = grad;
	}

	ctx.strokeStyle = activeColor;
	ctx.fillStyle = activeColor;
	ctx.lineCap = 'round';
	ctx.lineJoin = 'round';

	// Draw Logic
	const drawVisualizerPath = () => {
	ctx.beginPath();

	if (vizType === 'bars') {
	const step = thickness + spacing;
	const maxBars = Math.floor((width / 2) / step);
	const usefulLength = Math.floor(bufferLength * 0.75);
	const numBars = Math.min(maxBars, usefulLength);

	for (let i = 0; i < numBars; i++) {
	const dataIndex = Math.floor((i / numBars) * usefulLength);
	const boost = Math.pow(1 + (i / numBars), 1.5);
	const value = dataArray[dataIndex] * boost * sensitivity;

	const barHeight = Math.max(thickness / 2, (value / 255) * height * 0.8);
	const xOffset = i * step + (step / 2);

	ctx.moveTo(xOffset, height / 2 - (thickness / 2));
	ctx.lineTo(xOffset, height / 2 - barHeight);

	ctx.moveTo(-xOffset, height / 2 - (thickness / 2));
	ctx.lineTo(-xOffset, height / 2 - barHeight);
	}
	} else if (vizType === 'wave') {
	const sliceWidth = width / bufferLength;
	let x = -width / 2;

	for (let i = 0; i < bufferLength; i++) {
	const normalized = (dataArray[i] / 128.0) - 1;
	const y = normalized * sensitivity * (height / 2);

	if (i === 0) {
	ctx.moveTo(x, y);
	} else {
	ctx.lineTo(x, y);
	}
	x += sliceWidth;
	}
	} else if (vizType === 'circle') {
	const radius = height / 4;
	const circumference = 2 * Math.PI * radius;
	const stepSize = thickness + spacing;
	const bars = Math.min(180, Math.floor(circumference / stepSize));
	const step = (Math.PI * 2) / bars;

	for (let i = 0; i < bars; i++) {
	const dataIndex = Math.floor((i / bars) * (bufferLength / 2));
	const value = (dataArray[dataIndex] / 255) * sensitivity;
	const barHeight = Math.max(thickness / 2, value * (height / 3));
	const angle = i * step;

	const x1 = Math.cos(angle) * radius;
	const y1 = Math.sin(angle) * radius;
	const x2 = Math.cos(angle) * (radius + barHeight);
	const y2 = Math.sin(angle) * (radius + barHeight);

	ctx.moveTo(x1, y1);
	ctx.lineTo(x2, y2);
	}
	}

	ctx.stroke();

	if (vizType === 'circle') {
	const radius = height / 4;
	ctx.beginPath();
	ctx.arc(0, 0, radius - thickness, 0, Math.PI * 2);
	const originalWidth = ctx.lineWidth;
	ctx.lineWidth = originalWidth / 2;
	ctx.stroke();
	ctx.lineWidth = originalWidth;
	}
	};

	// Glow logic
	if (glow) {
	ctx.globalCompositeOperation = 'lighter';

	ctx.lineWidth = thickness * 3;
	ctx.globalAlpha = 0.15;
	drawVisualizerPath();

	ctx.lineWidth = thickness * 1.5;
	ctx.globalAlpha = 0.4;
	drawVisualizerPath();

	ctx.lineWidth = thickness;
	ctx.globalAlpha = 1.0;
	drawVisualizerPath();

	ctx.globalCompositeOperation = 'source-over';
	} else {
	ctx.lineWidth = thickness;
	ctx.globalAlpha = 1.0;
	drawVisualizerPath();
	}

	ctx.restore();
	reqIdRef.current = requestAnimationFrame(draw);
	}, [vizType, color, thickness, spacing, sensitivity, smoothing, colorMode, color2, glow, resolution, bgType, bgColor, offsetX, offsetY, scale, rotation, isExportingVideo, exportFps]);

	useEffect(() => {
	reqIdRef.current = requestAnimationFrame(draw);
	return () => cancelAnimationFrame(reqIdRef.current);
	}, [draw]);

	const handleAudioEnded = () => {
	setIsPlaying(false);
	if (isExportingVideo) stopVideoExport();
	};

	const exportImage = () => {
	if (!canvasRef.current) return;
	const link = document.createElement('a');
	link.download = `visualizer_${Date.now()}.png`;
	link.href = canvasRef.current.toDataURL('image/png');
	link.click();
	};

	const startVideoExport = async () => {
	if (!audioSrc \|\| !canvasRef.current \|\| !audioCtxRef.current) {
	alert("Please upload an audio file and press play at least once to initialize.");
	return;
	}

	setIsExportingVideo(true);
	setExportProgress(0);
	chunksRef.current = [];

	audioRef.current.pause();
	audioRef.current.currentTime = 0;

	// FIX: Force appropriate framerate to prevent encoder crashes at 4K
	const canvasStream = canvasRef.current.captureStream(exportFps);
	const audioStream = destRef.current.stream;

	const combinedTracks = [...canvasStream.getTracks(), ...audioStream.getAudioTracks()];
	const combinedStream = new MediaStream(combinedTracks);

	let options = {};
	let ext = 'webm';

	// Set higher bitrates for 4K to prevent blocky artifacts
	const is4k = resolution.startsWith('4k');
	const targetBitrate = is4k ? 15000000 : 8000000; // 15 Mbps for 4k, 8 Mbps for 1080p

	if (exportFormat === 'mp4') {
	if (MediaRecorder.isTypeSupported('video/mp4; codecs=h264')) {
	options = { mimeType: 'video/mp4; codecs=h264', videoBitsPerSecond: targetBitrate };
	ext = 'mp4';
	} else if (MediaRecorder.isTypeSupported('video/mp4')) {
	options = { mimeType: 'video/mp4', videoBitsPerSecond: targetBitrate };
	ext = 'mp4';
	} else {
	alert("Your browser doesn't natively support MP4 export. Falling back to WebM.");
	options = { mimeType: 'video/webm; codecs=vp9', videoBitsPerSecond: targetBitrate };
	}
	} else {
	options = { mimeType: 'video/webm; codecs=vp9', videoBitsPerSecond: targetBitrate };
	if (!MediaRecorder.isTypeSupported(options.mimeType)) {
	options = { mimeType: 'video/webm; codecs=vp8', videoBitsPerSecond: targetBitrate };
	}
	if (!MediaRecorder.isTypeSupported(options.mimeType)) {
	options = { videoBitsPerSecond: targetBitrate };
	}
	}

	try {
	mediaRecorderRef.current = new MediaRecorder(combinedStream, options);
	} catch (e) {
	console.error(e);
	alert("Error starting video recorder. See console.");
	setIsExportingVideo(false);
	return;
	}

	mediaRecorderRef.current.ondataavailable = (e) => {
	if (e.data && e.data.size > 0) chunksRef.current.push(e.data);
	};

	mediaRecorderRef.current.onstop = () => {
	const blob = new Blob(chunksRef.current, { type: mediaRecorderRef.current.mimeType \|\| 'video/mp4' });
	const url = URL.createObjectURL(blob);
	const link = document.createElement('a');
	link.download = `visualizer_${resolution}_${exportFps}fps_${Date.now()}.${ext}`;
	link.href = url;
	link.click();
	URL.revokeObjectURL(url);
	setIsExportingVideo(false);
	setExportProgress(0);
	};

	const duration = audioRef.current.duration;
	const progressInterval = setInterval(() => {
	if (audioRef.current && !audioRef.current.paused) {
	setExportProgress((audioRef.current.currentTime / duration) * 100);
	} else {
	clearInterval(progressInterval);
	}
	}, 500);

	// FIX: Use 1000ms chunks instead of 100ms. Less memory overhead prevents OOM freezing
	mediaRecorderRef.current.start(1000);
	await audioRef.current.play();
	setIsPlaying(true);
	};

	const stopVideoExport = () => {
	if (mediaRecorderRef.current && mediaRecorderRef.current.state !== 'inactive') {
	mediaRecorderRef.current.stop();
	}
	audioRef.current.pause();
	setIsPlaying(false);
	};

	return (
	<div className="min-h-screen bg-slate-950 text-slate-200 font-sans selection:bg-cyan-500/30 font-sans">
	<header className="border-b border-slate-800 bg-slate-900/50 p-6 flex items-center justify-between">
	<div className="flex items-center gap-3">
	<div className="bg-cyan-500/20 p-2 rounded-lg">
	<Video className="w-6 h-6 text-cyan-400" />
	</div>
	<h1 className="text-xl font-bold tracking-tight text-white">4K Transparent Visualizer</h1>
	</div>
	<div className="text-sm text-slate-400 hidden sm:block">
	All processing is strictly local.
	</div>
	</header>

	<main className="container mx-auto p-6 grid lg:grid-cols-12 gap-8">

	<div className="lg:col-span-4 space-y-6">

	<section className="bg-slate-900 p-6 rounded-2xl border border-slate-800 shadow-xl">
	<h2 className="text-sm font-semibold uppercase tracking-wider text-slate-500 mb-4 flex items-center gap-2">
	<Upload className="w-4 h-4" /> Audio Input
	</h2>
	<label className="block w-full cursor-pointer bg-slate-800 hover:bg-slate-700 transition-colors border-2 border-dashed border-slate-600 rounded-xl p-8 text-center group">
	<input
	type="file"
	accept="audio/*"
	onChange={handleFileUpload}
	className="hidden"
	disabled={isExportingVideo}
	/>
	<div className="mx-auto w-12 h-12 bg-slate-900 rounded-full flex items-center justify-center mb-3 group-hover:scale-110 transition-transform">
	<Upload className="w-6 h-6 text-cyan-400" />
	</div>
	<p className="font-medium text-slate-300">
	{fileName ? fileName : 'Click to browse audio file'}
	</p>
	<p className="text-xs text-slate-500 mt-2">MP3, WAV, FLAC</p>
	</label>

	<audio
	ref={audioRef}
	src={audioSrc}
	onEnded={handleAudioEnded}
	onPlay={() => setIsPlaying(true)}
	onPause={() => setIsPlaying(false)}
	onTimeUpdate={handleTimeUpdate}
	onLoadedMetadata={handleLoadedMetadata}
	/>
	</section>

	<section className="bg-slate-900 p-6 rounded-2xl border border-slate-800 shadow-xl">
	<h2 className="text-sm font-semibold uppercase tracking-wider text-slate-500 mb-4 flex items-center gap-2">
	<Settings2 className="w-4 h-4" /> Visual Settings
	</h2>

	<div className="space-y-5">
	<div>
	<label className="block text-sm font-medium text-slate-400 mb-2">Style</label>
	<div className="grid grid-cols-3 gap-2">
	{['bars', 'wave', 'circle'].map(type => (
	<button
	key={type}
	onClick={() => setVizType(type)}
	className={`py-2 px-3 rounded-lg text-sm font-medium capitalize transition-all ${
	vizType === type
	? 'bg-slate-700 text-white shadow-inner border border-slate-600'
	: 'bg-slate-950 text-slate-400 border border-slate-800 hover:border-slate-600'
	}`}
	>
	{type}
	</button>
	))}
	</div>
	</div>

	<div>
	<div className="flex justify-between items-center mb-2">
	<label className="text-sm font-medium text-slate-400">Color Style</label>
	<select
	value={colorMode}
	onChange={(e) => setColorMode(e.target.value)}
	className="bg-slate-950 border border-slate-700 text-slate-300 text-xs rounded px-2 py-1 outline-none"
	>
	<option value="solid">Solid</option>
	<option value="gradient">Gradient</option>
	<option value="rainbow">Rainbow</option>
	</select>
	</div>

	<div className="flex items-center gap-3">
	{colorMode !== 'rainbow' && (
	<input
	type="color"
	value={color}
	onChange={(e) => setColor(e.target.value)}
	className="h-10 w-14 rounded cursor-pointer bg-slate-950 border border-slate-700 shrink-0"
	/>
	)}
	{colorMode === 'gradient' && (
	<>
	<span className="text-slate-500 text-xs font-medium">to</span>
	<input
	type="color"
	value={color2}
	onChange={(e) => setColor2(e.target.value)}
	className="h-10 w-14 rounded cursor-pointer bg-slate-950 border border-slate-700 shrink-0"
	/>
	</>
	)}
	{colorMode === 'solid' && (
	<input
	type="text"
	value={color}
	onChange={(e) => setColor(e.target.value)}
	className="flex-1 bg-slate-950 border border-slate-800 rounded-lg px-3 py-2 text-sm focus:ring-1 focus:ring-cyan-500 outline-none uppercase font-mono"
	/>
	)}
	</div>
	</div>

	<div className="flex items-center justify-between bg-slate-950 p-3 rounded-xl border border-slate-800">
	<div className="flex items-center gap-2">
	<Sparkles className="w-4 h-4 text-amber-400" />
	<span className="text-sm font-medium text-slate-300">Neon Glow Effect</span>
	</div>
	<label className="relative inline-flex items-center cursor-pointer">
	<input type="checkbox" checked={glow} onChange={(e) => setGlow(e.target.checked)} className="sr-only peer" />
	<div className="w-11 h-6 bg-slate-700 peer-focus:outline-none rounded-full peer peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:border-gray-300 after:border after:rounded-full after:h-5 after:w-5 after:transition-all peer-checked:bg-cyan-500"></div>
	</label>
	</div>

	<div>
	<label className="flex justify-between text-sm font-medium text-slate-400 mb-2">
	<span>Line Thickness</span>
	<span className="text-slate-500">{thickness}px</span>
	</label>
	<input
	type="range"
	min="2" max="64"
	value={thickness}
	onChange={(e) => setThickness(Number(e.target.value))}
	className="w-full accent-cyan-500 cursor-pointer"
	/>
	</div>

	<div>
	<label className="flex justify-between text-sm font-medium text-slate-400 mb-2">
	<span>Space Between Lines</span>
	<span className="text-slate-500">{spacing}px</span>
	</label>
	<input
	type="range"
	min="0" max="64"
	value={spacing}
	onChange={(e) => setSpacing(Number(e.target.value))}
	className="w-full accent-cyan-500 cursor-pointer"
	/>
	</div>

	<div>
	<label className="flex justify-between text-sm font-medium text-slate-400 mb-2">
	<span>Amplitude (Height)</span>
	<span className="text-slate-500">{sensitivity.toFixed(1)}x</span>
	</label>
	<input
	type="range"
	min="0.5" max="3.0" step="0.1"
	value={sensitivity}
	onChange={(e) => setSensitivity(Number(e.target.value))}
	className="w-full accent-cyan-500 cursor-pointer"
	/>
	</div>

	<div>
	<label className="flex justify-between text-sm font-medium text-slate-400 mb-2">
	<span>Motion Smoothing</span>
	<span className="text-slate-500">{Math.round(smoothing * 100)}%</span>
	</label>
	<input
	type="range"
	min="0.1" max="0.99" step="0.01"
	value={smoothing}
	onChange={(e) => setSmoothing(Number(e.target.value))}
	className="w-full accent-cyan-500 cursor-pointer"
	/>
	</div>

	<div className="pt-4 mt-4 border-t border-slate-800 space-y-5">
	<h3 className="text-xs font-semibold uppercase tracking-wider text-slate-500 mb-2">Transform & Position</h3>

	<div>
	<label className="flex justify-between text-sm font-medium text-slate-400 mb-2">
	<span>Size (Scale)</span>
	<span className="text-slate-500">{scale.toFixed(2)}x</span>
	</label>
	<input
	type="range"
	min="0.1" max="3.0" step="0.1"
	value={scale}
	onChange={(e) => setScale(Number(e.target.value))}
	className="w-full accent-cyan-500 cursor-pointer"
	/>
	</div>

	<div>
	<label className="flex justify-between text-sm font-medium text-slate-400 mb-2">
	<span>Rotation</span>
	<span className="text-slate-500">{rotation}°</span>
	</label>
	<input
	type="range"
	min="0" max="360" step="1"
	value={rotation}
	onChange={(e) => setRotation(Number(e.target.value))}
	className="w-full accent-cyan-500 cursor-pointer"
	/>
	</div>

	<div>
	<label className="flex justify-between text-sm font-medium text-slate-400 mb-2">
	<span>Horizontal Position</span>
	<span className="text-slate-500">{Math.round(offsetX)}%</span>
	</label>
	<input
	type="range"
	min="-50" max="50" step="1"
	value={offsetX}
	onChange={(e) => setOffsetX(Number(e.target.value))}
	className="w-full accent-cyan-500 cursor-pointer"
	/>
	</div>

	<div>
	<label className="flex justify-between text-sm font-medium text-slate-400 mb-2">
	<span>Vertical Position</span>
	<span className="text-slate-500">{Math.round(offsetY)}%</span>
	</label>
	<input
	type="range"
	min="-50" max="50" step="1"
	value={offsetY}
	onChange={(e) => setOffsetY(Number(e.target.value))}
	className="w-full accent-cyan-500 cursor-pointer"
	/>
	</div>
	</div>

	</div>
	</section>

	<section className="bg-slate-900 p-6 rounded-2xl border border-slate-800 shadow-xl">
	<h2 className="text-sm font-semibold uppercase tracking-wider text-slate-500 mb-4 flex items-center gap-2">
	<Monitor className="w-4 h-4" /> Output Setup
	</h2>

	<div className="space-y-5">
	<div>
	<label className="block text-sm font-medium text-slate-400 mb-2">Aspect Ratio & Resolution</label>
	<select
	value={resolution}
	onChange={(e) => setResolution(e.target.value)}
	className="w-full bg-slate-950 border border-slate-700 text-slate-300 text-sm rounded-lg px-3 py-2.5 outline-none focus:ring-1 focus:ring-cyan-500"
	>
	<option value="4k_16_9">4K Landscape (3840x2160)</option>
	<option value="1080p_16_9">1080p Landscape (1920x1080)</option>
	<option value="4k_9_16">4K Vertical / Reels (2160x3840)</option>
	<option value="1080p_9_16">1080p Vertical / Reels (1080x1920)</option>
	</select>
	</div>

	<div>
	<label className="block text-sm font-medium text-slate-400 mb-2">Background Type</label>
	<div className="flex gap-2 mb-3">
	{['transparent', 'color', 'image'].map(type => (
	<button
	key={type}
	onClick={() => setBgType(type)}
	className={`flex-1 py-2 px-2 rounded-lg text-xs font-medium capitalize transition-all ${
	bgType === type
	? 'bg-slate-700 text-white shadow-inner border border-slate-600'
	: 'bg-slate-950 text-slate-400 border border-slate-800 hover:border-slate-600'
	}`}
	>
	{type}
	</button>
	))}
	</div>

	{bgType === 'color' && (
	<div className="flex items-center gap-3 mt-2 bg-slate-950 p-2 rounded-lg border border-slate-800">
	<input type="color" value={bgColor} onChange={(e) => setBgColor(e.target.value)} className="h-8 w-12 rounded cursor-pointer bg-slate-950 border border-slate-700" />
	<span className="text-sm font-mono text-slate-400 uppercase">{bgColor}</span>
	</div>
	)}

	{bgType === 'image' && (
	<div className="mt-2">
	<label className="flex items-center justify-center gap-2 w-full cursor-pointer bg-slate-950 hover:bg-slate-800 transition-colors border border-dashed border-slate-600 rounded-lg p-3 text-center text-sm text-slate-300">
	<ImagePlus className="w-4 h-4" />
	{bgImageSrc ? 'Change Image' : 'Upload Background Image'}
	<input type="file" accept="image/*" onChange={handleBgUpload} className="hidden" />
	</label>
	</div>
	)}
	</div>
	</div>
	</section>

	<section className="bg-slate-900 p-6 rounded-2xl border border-slate-800 shadow-xl">
	<h2 className="text-sm font-semibold uppercase tracking-wider text-slate-500 mb-4">Export Options</h2>

	<div className="flex flex-col gap-3">
	<div className="bg-slate-950 p-4 rounded-xl border border-slate-800 mb-2">
	<label className="block text-sm font-medium text-slate-400 mb-2">Video Format & Framerate</label>
	<div className="flex flex-col 2xl:flex-row gap-3">
	<select
	value={exportFormat}
	onChange={(e) => setExportFormat(e.target.value)}
	className="w-full bg-slate-900 border border-slate-700 text-slate-300 text-sm rounded-lg px-3 py-2.5 outline-none focus:ring-1 focus:ring-cyan-500"
	>
	<option value="webm">WebM (Transparent)</option>
	<option value="mp4">MP4 (Solid BG / DaVinci)</option>
	</select>

	<select
	value={exportFps}
	onChange={(e) => setExportFps(Number(e.target.value))}
	className="w-full 2xl:w-32 bg-slate-900 border border-slate-700 text-slate-300 text-sm rounded-lg px-3 py-2.5 outline-none focus:ring-1 focus:ring-cyan-500"
	>
	<option value={30}>30 FPS</option>
	<option value={60}>60 FPS</option>
	</select>
	</div>

	<div className="mt-3 p-3 bg-red-500/10 border border-red-500/20 rounded-lg">
	<p className="text-xs text-red-400 leading-relaxed">
	<strong>Video Freezing/Crashing?</strong> Real-time 4K encoding is extremely heavy. To fix this:<br/>
	1. Set Framerate to <strong>30 FPS</strong>.<br/>
	2. Turn off <strong>Neon Glow Effect</strong> (massive performance boost).<br/>
	3. Lower Resolution to <strong>1080p</strong>.
	</p>
	</div>

	{exportFormat === 'mp4' && (
	<div className="mt-3 p-3 bg-amber-500/10 border border-amber-500/20 rounded-lg">
	<p className="text-xs text-amber-500/90 leading-relaxed">
	<strong>DaVinci Resolve Tip:</strong> MP4s cannot be transparent. Set your Background Type to <strong>Color (Black)</strong>, export the MP4, and in DaVinci, set your clip's Composite Mode to <strong>Screen</strong> or <strong>Add</strong>.
	</p>
	</div>
	)}
	</div>

	<button
	onClick={exportImage}
	disabled={isExportingVideo}
	className="w-full bg-slate-800 hover:bg-slate-700 text-white font-medium py-3 px-4 rounded-xl flex items-center justify-center gap-2 transition-colors disabled:opacity-50"
	>
	<ImageIcon className="w-4 h-4" />
	Save Snapshot (PNG)
	</button>

	{isExportingVideo ? (
	<div className="w-full space-y-3">
	<button
	onClick={stopVideoExport}
	className="w-full bg-red-500/10 hover:bg-red-500/20 text-red-500 border border-red-500/20 font-bold py-3 px-4 rounded-xl flex items-center justify-center gap-2 transition-colors"
	>
	<StopCircle className="w-5 h-5" />
	Stop & Save
	</button>
	<div className="w-full bg-slate-950 rounded-full h-2.5 border border-slate-800 overflow-hidden">
	<div className="bg-cyan-500 h-2.5 rounded-full transition-all duration-300" style={{ width: `${exportProgress}%` }}></div>
	</div>
	<p className="text-xs text-center text-slate-400">Recording video... {Math.round(exportProgress)}%</p>
	</div>
	) : (
	<button
	onClick={startVideoExport}
	disabled={!audioSrc}
	className="w-full bg-gradient-to-r from-indigo-500 to-cyan-500 hover:from-indigo-400 hover:to-cyan-400 text-white font-bold py-3 px-4 rounded-xl flex items-center justify-center gap-2 transition-all shadow-lg shadow-cyan-500/20 disabled:opacity-50 disabled:shadow-none"
	>
	<Video className="w-5 h-5" />
	Export Video ({exportFormat.toUpperCase()})
	</button>
	)}
	</div>
	</section>

	</div>

	<div className="lg:col-span-8 flex flex-col gap-4 lg:sticky lg:top-6 lg:h-[calc(100vh-3rem)]">
	<div className="bg-slate-900 rounded-2xl border border-slate-800 shadow-xl overflow-hidden flex-1 relative flex flex-col min-h-0">

	<div className="p-4 border-b border-slate-800 bg-slate-900/80 flex justify-between items-center z-10 shrink-0">
	<span className="text-sm font-semibold text-slate-300 flex items-center gap-2">
	Live Preview
	<span className="bg-slate-800 text-xs px-2 py-0.5 rounded text-slate-400 border border-slate-700">
	{RESOLUTIONS[resolution]?.w}x{RESOLUTIONS[resolution]?.h}
	</span>
	</span>
	<span className="text-xs text-slate-500">
	{bgType === 'transparent' ? 'Checkerboard denotes transparency' : 'Background included in export'}
	</span>
	</div>

	<div
	className="flex-1 w-full relative flex items-center justify-center p-4 sm:p-6 overflow-hidden bg-black/50 min-h-0"
	style={ bgType === 'transparent' ? {
	backgroundImage: 'repeating-linear-gradient(45deg, #0f172a 25%, transparent 25%, transparent 75%, #0f172a 75%, #0f172a), repeating-linear-gradient(45deg, #0f172a 25%, #1e293b 25%, #1e293b 75%, #0f172a 75%, #0f172a)',
	backgroundPosition: '0 0, 10px 10px',
	backgroundSize: '20px 20px'
	} : {}}
	>
	<canvas
	ref={canvasRef}
	width={RESOLUTIONS[resolution]?.w \|\| 3840}
	height={RESOLUTIONS[resolution]?.h \|\| 2160}
	onMouseDown={handleMouseDown}
	onMouseMove={handleMouseMove}
	onMouseUp={handleMouseUpOrLeave}
	onMouseLeave={handleMouseUpOrLeave}
	className={`max-w-full max-h-full object-contain drop-shadow-2xl rounded-lg ring-1 ring-white/10 bg-transparent ${RESOLUTIONS[resolution]?.isVertical ? 'aspect-[9/16]' : 'aspect-video'} ${isDragging ? 'cursor-grabbing' : 'cursor-grab'}`}
	/>

	{!audioSrc && (
	<div className="absolute inset-0 flex flex-col items-center justify-center pointer-events-none bg-slate-900/80 backdrop-blur-sm z-20">
	<Loader2 className="w-12 h-12 text-slate-500 animate-spin mb-4 opacity-50" />
	<p className="text-slate-400 font-medium">Awaiting Audio Input</p>
	</div>
	)}
	</div>
	</div>

	<div className="bg-slate-900 p-4 sm:p-5 rounded-2xl border border-slate-800 shadow-xl shrink-0 flex flex-col gap-3">
	<div className="flex items-center gap-4">
	<button
	onClick={togglePlay}
	disabled={!audioSrc \|\| isExportingVideo}
	className="w-12 h-12 shrink-0 bg-cyan-500 hover:bg-cyan-400 text-slate-950 rounded-full flex items-center justify-center transition-colors disabled:opacity-50 disabled:hover:bg-cyan-500"
	>
	{isPlaying ? <Pause className="w-6 h-6 fill-current" /> : <Play className="w-6 h-6 fill-current ml-1" />}
	</button>

	<div className="flex-1 flex flex-col gap-2">
	<div className="flex justify-between text-xs font-mono text-slate-400">
	<span>{formatTime(audioTime)}</span>
	<span className="text-slate-300 font-sans truncate px-4">{fileName \|\| 'No audio selected'}</span>
	<span>{formatTime(audioDuration)}</span>
	</div>
	<input
	type="range"
	min="0"
	max={audioDuration \|\| 100}
	value={audioTime}
	onChange={handleSeek}
	disabled={!audioSrc \|\| isExportingVideo}
	className="w-full accent-cyan-500 cursor-pointer h-2 bg-slate-800 rounded-lg appearance-none [&::-webkit-slider-thumb]:appearance-none [&::-webkit-slider-thumb]:w-4 [&::-webkit-slider-thumb]:h-4 [&::-webkit-slider-thumb]:bg-cyan-400 [&::-webkit-slider-thumb]:rounded-full"
	/>
	</div>
	</div>
	</div>

	</div>

	</main>
	</div>
	);
	}

	const root = ReactDOM.createRoot(document.getElementById('root'));
	root.render(<App />);
	</script>
	</body>
	</html>