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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Video Sync with Custom UI</title>
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<style>
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body { font-family: sans-serif; margin: 20px; }
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table { margin: 0 auto; }
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td { padding: 5px; vertical-align: middle; }
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.slider, .timeline-slider { }
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.video-container-wrapper { position: relative; display: inline-block; }
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.video-container {
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position: relative;
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width: 640px;
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height: 480px;
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background: #000;
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overflow: hidden;
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}
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.video {
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position: absolute;
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top: 0;
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left: 0;
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width: 640px;
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height: 480px;
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object-fit: cover;
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}
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.wipe-line {
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position: absolute;
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top: 0;
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width: 2px;
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height: 100%;
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background: blue;
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pointer-events: none;
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}
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</style>
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</head>
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<body>
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<center>
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<h1>Geostationary Satellite Time Interpolation</h1>
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<h4>Hyun Gon Ryu | NVIDIA AI Technology Center Korea</h4>
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</center>
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<table>
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<tr>
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<td width="700">
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<font size="1">
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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.
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</font>
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</td>
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</tr>
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</table>
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<table id="videoSetTable">
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<tr>
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<td>
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Select Video Set:
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<select id="videoSetSelect">
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<option value="">No</option>
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<option value="0">TongA Case | 20220116 | ir105</option>
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<option value="1">SouthAsia | 20240820 | ir105</option>
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<option value="2">EastAsia | 20240820 | ir105</option>
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<option value="3">SouthWestAsia | 20240820 | ir105</option>
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</select>
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</td>
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</tr>
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</table>
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<table id="controlTable">
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<tr>
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<td>
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<button id="playPauseBtn">PLAY</button>
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</td>
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<td>
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Screen Size:
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<select id="scaleSelect">
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<option value="0.5">0.5</option>
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<option value="1" selected>1</option>
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<option value="1.5">1.5</option>
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<option value="2">2</option>
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</select>
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</td>
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<td>
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Speed:
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<select id="speedSelect">
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<option value="0.1">0.1</option>
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<option value="0.2">0.2</option>
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<option value="0.3">0.3</option>
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<option value="0.4">0.4</option>
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<option value="0.5">0.5</option>
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<option value="0.6">0.6</option>
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<option value="0.7">0.7</option>
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<option value="0.8">0.8</option>
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<option value="0.9">0.9</option>
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<option value="1" selected>1</option>
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<option value="2">2</option>
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<option value="4">4</option>
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</select>
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</td>
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</tr>
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<tr>
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<td colspan="3">
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<input type="range" id="wipeRange" class="slider" min="0" max="1" step="0.01" value="0.5">
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</td>
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</tr>
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<tr>
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<td colspan="3">
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<input type="range" id="timelineRange" class="timeline-slider" min="0" max="100" step="0.1" value="0">
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</td>
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</tr>
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<tr>
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<td colspan="3">
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<div class="video-container-wrapper">
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<div class="video-container" id="videoContainer">
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<video id="video1" class="video" src="video1.mp4" preload="auto" muted></video>
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<video id="video2" class="video" src="video2.mp4" preload="auto" muted></video>
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<div id="wipeLine" class="wipe-line"></div>
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</div>
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</div>
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</td>
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</tr>
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</table>
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<script>
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const baseWidth = 640;
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const videoSets = [
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{ label: "TongA Case", area: "TongaArea", date: "20220116", sensor: "ir105" },
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{ label: "SouthAsia", area: "SouthAsia", date: "20240820", sensor: "ir105" },
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{ label: "EastAsia", area: "EastAsia", date: "20240820", sensor: "ir105" },
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{ label: "SouthWestAsia", area: "WestAsia", date: "20240820", sensor: "ir105" },
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];
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const video1 = document.getElementById("video1");
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const video2 = document.getElementById("video2");
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const playPauseBtn = document.getElementById("playPauseBtn");
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const wipeRange = document.getElementById("wipeRange");
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const timelineRange = document.getElementById("timelineRange");
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const scaleSelect = document.getElementById("scaleSelect");
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const speedSelect = document.getElementById("speedSelect");
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const videoContainer = document.getElementById("videoContainer");
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const wipeLine = document.getElementById("wipeLine");
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const controlTable = document.getElementById("controlTable");
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const videoSetSelect = document.getElementById("videoSetSelect");
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let isPlaying = false;
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function updateSpeed() {
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const speedValue = parseFloat(speedSelect.value);
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video1.playbackRate = speedValue;
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video2.playbackRate = speedValue;
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}
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function updateWipe() {
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const wipeValue = parseFloat(wipeRange.value);
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const rightPercent = (1 - wipeValue) * 100;
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video2.style.clipPath = `inset(0 ${rightPercent}% 0 0)`;
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const lineX = baseWidth * wipeValue - (wipeLine.clientWidth / 2);
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wipeLine.style.left = `${lineX}px`;
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}
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function updateTimeline() {
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if (video1.duration) {
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const percent = (video1.currentTime / video1.duration) * 100;
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timelineRange.value = percent;
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}
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}
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video1.addEventListener("timeupdate", updateTimeline);
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function togglePlayPause() {
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if (!isPlaying) {
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video1.play();
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video2.play();
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playPauseBtn.textContent = "Pause";
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isPlaying = true;
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} else {
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video1.pause();
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video2.pause();
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playPauseBtn.textContent = "Play";
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isPlaying = false;
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}
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}
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function seekTimeline() {
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if (video1.duration) {
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const percent = timelineRange.value / 100;
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const newTime = video1.duration * percent;
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video1.currentTime = newTime;
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video2.currentTime = newTime;
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}
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}
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function updateScale() {
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const scaleValue = parseFloat(scaleSelect.value);
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videoContainer.style.transform = `scale(${scaleValue})`;
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videoContainer.style.transformOrigin = "top left";
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const effectiveWidth = baseWidth * scaleValue;
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wipeRange.style.width = effectiveWidth + "px";
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timelineRange.style.width = effectiveWidth + "px";
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controlTable.style.width = effectiveWidth + "px";
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updateWipe();
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}
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function updateVideoSet() {
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const selectedIndex = videoSetSelect.value;
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if (selectedIndex === "") {
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return;
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}
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const videoSet = videoSets[parseInt(selectedIndex)];
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const area = videoSet.area;
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const date = videoSet.date;
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const sensor = videoSet.sensor;
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const originalFile = `${area}/video_${area}_${sensor}um_${date}_10min_010fps.mp4`;
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const enhancedFile = `${area}/video_${area}_${sensor}um_${date}_01min_100fps.mp4`;
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video1.setAttribute("src", originalFile);
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video2.setAttribute("src", enhancedFile);
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video1.load();
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video2.load();
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}
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playPauseBtn.addEventListener("click", togglePlayPause);
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wipeRange.addEventListener("input", updateWipe);
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timelineRange.addEventListener("input", seekTimeline);
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scaleSelect.addEventListener("change", updateScale);
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speedSelect.addEventListener("change", updateSpeed);
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videoSetSelect.addEventListener("change", updateVideoSet);
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updateWipe();
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updateScale();
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updateSpeed();
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</script>
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</body>
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</html>
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