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	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Video Sync with Custom UI</title>
	<style>
	body { font-family: sans-serif; margin: 20px; }
	table { margin: 0 auto; }
	td { padding: 5px; vertical-align: middle; }
	.slider, .timeline-slider { }
	.video-container-wrapper { position: relative; display: inline-block; }
	.video-container {
	position: relative;
	width: 640px;
	height: 480px;
	background: #000;
	overflow: hidden;
	}
	.video {
	position: absolute;
	top: 0;
	left: 0;
	width: 640px;
	height: 480px;
	object-fit: cover;
	}
	.wipe-line {
	position: absolute;
	top: 0;
	width: 2px;
	height: 100%;
	background: blue;
	pointer-events: none;
	}
	</style>
	</head>
	<body>
	<center>
	<h1>Geostationary Satellite Time Interpolation</h1>
	<h4>Hyun Gon Ryu \| NVIDIA AI Technology Center Korea</h4>
	</center>
	<table>
	<tr>
	<td width="700">
	<font size="1">
	This demo video consists of images generated at one-minute intervals from the KMA GK2A satellite's full-disk images, originally captured at ten-minute intervals, using the VFI technique. By using the wipe scrollbar, you can compare the original video (delineated by a blue line) with the enhanced version. You can adjust the zoom and playback speed, and when played at 0.3x speed, the differences between the two videos become distinctly apparent.
	</font>
	</td>
	</tr>
	</table>

	<!-- Video set selection -->
	<table id="videoSetTable">
	<tr>
	<td>
	Select Video Set:
	<select id="videoSetSelect">
	<option value="">No</option>
	<option value="0">TongA Case \| 20220116 \| ir105</option>
	<option value="1">SouthAsia \| 20240820 \| ir105</option>
	<option value="2">EastAsia \| 20240820 \| ir105</option>
	<option value="3">SouthWestAsia \| 20240820 \| ir105</option>
	</select>
	</td>
	</tr>
	</table>

	<table id="controlTable">
	<!-- 1st Row: Play button, Speed, Screen Size -->
	<tr>
	<td>
	<button id="playPauseBtn">PLAY</button>
	</td>
	<td>
	Screen Size:
	<select id="scaleSelect">
	<option value="0.5">0.5</option>
	<option value="1" selected>1</option>
	<option value="1.5">1.5</option>
	<option value="2">2</option>
	</select>
	</td>
	<td>
	Speed:
	<select id="speedSelect">
	<option value="0.1">0.1</option>
	<option value="0.2">0.2</option>
	<option value="0.3">0.3</option>
	<option value="0.4">0.4</option>
	<option value="0.5">0.5</option>
	<option value="0.6">0.6</option>
	<option value="0.7">0.7</option>
	<option value="0.8">0.8</option>
	<option value="0.9">0.9</option>
	<option value="1" selected>1</option>
	<option value="2">2</option>
	<option value="4">4</option>
	</select>
	</td>
	</tr>

	<!-- 2nd Row: Wipe Slider -->
	<tr>
	<td colspan="3">
	<input type="range" id="wipeRange" class="slider" min="0" max="1" step="0.01" value="0.5">
	</td>
	</tr>

	<!-- 3rd Row: Timeline Slider -->
	<tr>
	<td colspan="3">
	<input type="range" id="timelineRange" class="timeline-slider" min="0" max="100" step="0.1" value="0">
	</td>
	</tr>

	<!-- 4th Row: Video Area -->
	<tr>
	<td colspan="3">
	<div class="video-container-wrapper">
	<div class="video-container" id="videoContainer">
	<video id="video1" class="video" src="video1.mp4" preload="auto" muted></video>
	<video id="video2" class="video" src="video2.mp4" preload="auto" muted></video>
	<div id="wipeLine" class="wipe-line"></div>
	</div>
	</div>
	</td>
	</tr>
	</table>

	<script>
	// Base width remains constant.
	const baseWidth = 640;

	// Predefined video sets.
	const videoSets = [
	{ label: "TongA Case", area: "TongaArea", date: "20220116", sensor: "ir105" },
	{ label: "SouthAsia", area: "SouthAsia", date: "20240820", sensor: "ir105" },
	{ label: "EastAsia", area: "EastAsia", date: "20240820", sensor: "ir105" },
	{ label: "SouthWestAsia", area: "WestAsia", date: "20240820", sensor: "ir105" },
	];

	// Get DOM elements.
	const video1 = document.getElementById("video1");
	const video2 = document.getElementById("video2");
	const playPauseBtn = document.getElementById("playPauseBtn");
	const wipeRange = document.getElementById("wipeRange");
	const timelineRange = document.getElementById("timelineRange");
	const scaleSelect = document.getElementById("scaleSelect");
	const speedSelect = document.getElementById("speedSelect");
	const videoContainer = document.getElementById("videoContainer");
	const wipeLine = document.getElementById("wipeLine");
	const controlTable = document.getElementById("controlTable");
	const videoSetSelect = document.getElementById("videoSetSelect");

	let isPlaying = false;

	// Update playback speed.
	function updateSpeed() {
	const speedValue = parseFloat(speedSelect.value);
	video1.playbackRate = speedValue;
	video2.playbackRate = speedValue;
	}

	// Update the wipe effect.
	function updateWipe() {
	const wipeValue = parseFloat(wipeRange.value);
	const rightPercent = (1 - wipeValue) * 100;
	video2.style.clipPath = `inset(0 ${rightPercent}% 0 0)`;
	// Calculate position using the base width.
	const lineX = baseWidth * wipeValue - (wipeLine.clientWidth / 2);
	wipeLine.style.left = `${lineX}px`;
	}

	// Update timeline slider based on video progress.
	function updateTimeline() {
	if (video1.duration) {
	const percent = (video1.currentTime / video1.duration) * 100;
	timelineRange.value = percent;
	}
	}
	video1.addEventListener("timeupdate", updateTimeline);

	// Toggle play/pause.
	function togglePlayPause() {
	if (!isPlaying) {
	video1.play();
	video2.play();
	playPauseBtn.textContent = "Pause";
	isPlaying = true;
	} else {
	video1.pause();
	video2.pause();
	playPauseBtn.textContent = "Play";
	isPlaying = false;
	}
	}

	// Seek both videos.
	function seekTimeline() {
	if (video1.duration) {
	const percent = timelineRange.value / 100;
	const newTime = video1.duration * percent;
	video1.currentTime = newTime;
	video2.currentTime = newTime;
	}
	}

	// Update scale and adjust related elements.
	function updateScale() {
	const scaleValue = parseFloat(scaleSelect.value);
	videoContainer.style.transform = `scale(${scaleValue})`;
	videoContainer.style.transformOrigin = "top left";
	// Update slider and table widths to the visually scaled size.
	const effectiveWidth = baseWidth * scaleValue;
	wipeRange.style.width = effectiveWidth + "px";
	timelineRange.style.width = effectiveWidth + "px";
	controlTable.style.width = effectiveWidth + "px";
	updateWipe();
	}

	// Update video sources based on selected video set.
	function updateVideoSet() {
	const selectedIndex = videoSetSelect.value;
	if (selectedIndex === "") {
	// "No" selected, you could reset the video sources if desired.
	return;
	}
	const videoSet = videoSets[parseInt(selectedIndex)];
	const area = videoSet.area;
	const date = videoSet.date;
	const sensor = videoSet.sensor;
	// Construct filenames.
	const originalFile = `${area}/video_${area}_${sensor}um_${date}_10min_010fps.mp4`;
	const enhancedFile = `${area}/video_${area}_${sensor}um_${date}_01min_100fps.mp4`;
	// Update video sources.
	video1.setAttribute("src", originalFile);
	video2.setAttribute("src", enhancedFile);
	// Reload the videos.
	video1.load();
	video2.load();
	}

	// Event listeners.
	playPauseBtn.addEventListener("click", togglePlayPause);
	wipeRange.addEventListener("input", updateWipe);
	timelineRange.addEventListener("input", seekTimeline);
	scaleSelect.addEventListener("change", updateScale);
	speedSelect.addEventListener("change", updateSpeed);
	videoSetSelect.addEventListener("change", updateVideoSet);

	// Initial setup.
	updateWipe();
	updateScale();
	updateSpeed();
	</script>
	</body>
	</html>