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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>
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