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	<!DOCTYPE html>
	<html lang="ja">
	<head>
	<meta charset="UTF-8">
	<title>動画プレイヤー</title>
	<style>
	body {
	display: flex;
	flex-direction: column;
	align-items: center;
	background-color: #0a0a12;
	color: #00ffcc;
	font-family: 'Courier New', monospace;
	padding: 20px;
	margin: 0;
	}

	h1 {
	color: #00aaff;
	text-shadow: 0 0 5px #0066ff;
	border-bottom: 1px solid #0066ff;
	padding-bottom: 10px;
	text-align: center;
	}

	.video-container {
	position: relative;
	max-width: 800px;
	margin-bottom: 20px;
	margin-top: 30px;
	border: 2px solid #0066ff;
	box-shadow: 0 0 15px rgba(0, 102, 255, 0.5);
	background: #000;
	}

	video {
	width: 100%;
	display: block;
	}

	/* 字幕スタイル */
	video::cue {
	background-color: rgba(0, 0, 0, 0.7) !important;
	color: #c7dbed !important;
	font-family: 'Courier New', monospace !important;
	text-shadow: 1px 1px 2px #000 !important;
	outline: 3px solid #0b3e8f !important;
	border-radius: 10px !important; /* 角を丸める */
	}

	/* カスタム動画コントロール */
	video::-webkit-media-controls {
	display: none !important;
	}

	.custom-controls {
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	background: linear-gradient(to top, rgba(0, 20, 40, 0.9), transparent);
	padding: 10px;
	display: flex;
	flex-direction: column;
	opacity: 0;
	transition: opacity 0.3s;
	}

	.video-container:hover .custom-controls {
	opacity: 1;
	}

	.progress-container {
	width: 100%;
	height: 8px;
	background: #001133;
	margin-bottom: 10px;
	cursor: pointer;
	}

	.progress-bar {
	height: 100%;
	background: #00aaff;
	width: 0%;
	position: relative;
	}

	.progress-bar::after {
	content: '';
	position: absolute;
	right: -5px;
	top: 50%;
	transform: translateY(-50%);
	width: 10px;
	height: 10px;
	background: #00ccff;
	border-radius: 50%;
	box-shadow: 0 0 5px #00ccff;
	}

	.buttons-container {
	display: flex;
	align-items: center;
	justify-content: space-between;
	}

	.left-controls, .right-controls {
	display: flex;
	align-items: center;
	gap: 15px;
	}

	.control-btn {
	background: none;
	border: none;
	color: #00ccff;
	font-size: 16px;
	cursor: pointer;
	transition: all 0.3s;
	}

	.control-btn:hover {
	color: #00ffcc;
	text-shadow: 0 0 5px #00ffcc;
	}

	.time-display {
	font-size: 14px;
	color: #00aaff;
	font-family: 'Courier New', monospace;
	}

	.volume-container {
	display: flex;
	align-items: center;
	gap: 5px;
	}

	.volume-slider {
	width: 80px;
	-webkit-appearance: none;
	height: 4px;
	background: #001133;
	outline: none;
	}

	.volume-slider::-webkit-slider-thumb {
	-webkit-appearance: none;
	width: 12px;
	height: 12px;
	background: #00aaff;
	border-radius: 50%;
	cursor: pointer;
	}

	.controls {
	display: flex;
	flex-direction: column;
	gap: 15px;
	width: 100%;
	max-width: 800px;
	background-color: #0f0f1a;
	padding: 20px;
	border: 1px solid #0066ff;
	box-shadow: 0 0 15px rgba(0, 102, 255, 0.3);
	}

	.control-group {
	display: flex;
	flex-direction: row;
	align-items: center;
	justify-content: flex-start;
	gap: 10px;
	flex-wrap: nowrap;
	}

	.control-group label {
	white-space: nowrap;
	min-width: 100px;
	text-align: right;
	color: #00ccff;
	}

	input[type="range"] {
	flex-grow: 1;
	-webkit-appearance: none;
	height: 8px;
	background: #001133;
	border-radius: 5px;
	outline: none;
	}

	input[type="range"]::-webkit-slider-thumb {
	-webkit-appearance: none;
	width: 18px;
	height: 18px;
	background: #00aaff;
	border-radius: 50%;
	cursor: pointer;
	box-shadow: 0 0 5px #00aaff;
	}

	input[type="number"], select {
	background-color: #001133;
	color: #00ccff;
	border: 1px solid #0066ff;
	padding: 5px;
	font-family: 'Courier New', monospace;
	}

	button {
	background-color: #001133;
	color: #00ccff;
	border: 1px solid #0066ff;
	padding: 8px 15px;
	cursor: pointer;
	font-family: 'Courier New', monospace;
	transition: all 0.3s;
	align-self: flex-start;
	}

	button:hover {
	background-color: #0066ff;
	color: #000;
	box-shadow: 0 0 10px #0066ff;
	}

	select {
	width: 300px;
	background-color: #001133;
	color: #00ccff;
	border: 1px solid #0066ff;
	padding: 5px;
	}

	input[type="checkbox"] {
	-webkit-appearance: none;
	width: 18px;
	height: 18px;
	background: #001133;
	border: 1px solid #0066ff;
	position: relative;
	}

	input[type="checkbox"]:checked {
	background: #0066ff;
	box-shadow: 0 0 5px #0066ff;
	}

	input[type="checkbox"]:checked::after {
	content: "✓";
	position: absolute;
	color: #000;
	font-size: 14px;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	}

	/* 字幕設定用スタイル */
	.subtitle-settings {
	margin-top: 10px;
	padding: 10px;
	background-color: rgba(0, 20, 40, 0.5);
	border: 1px solid #0066ff;
	}

	/* 字幕サイズ調整用のCSS変数 */
	:root {
	--subtitle-scale: 1;
	--subtitle-border-radius: 10px;
	}

	video::cue {
	font-size: calc(16px * var(--subtitle-scale)) !important;
	line-height: 1.5 !important;
	border-radius: var(--subtitle-border-radius) !important;
	}

	/* 全画面時の字幕サイズ調整 */
	.video-container:fullscreen video::cue,
	.video-container:-webkit-full-screen video::cue,
	.video-container:-moz-full-screen video::cue,
	.video-container:-ms-fullscreen video::cue {
	font-size: calc(16px * var(--subtitle-scale) * var(--fullscreen-scale, 1)) !important;
	}
	</style>
	</head>
	<body>
	<h1>ラジオ体操動画プレイヤー<br>For Kushihara</h1>

	<div class="controls">
	<div class="control-group">
	<label for="videoSelect">動画の音量：</label>
	<select id="videoSelect">
	<option value="v.mp4">小</option>
	<option value="v-2.mp4">大(+50dB)</option>
	</select>
	</div>
	<div class="control-group">
	<label for="speedRange">再生速度：</label>
	<input type="range" id="speedRange" min="0.0001" max="20" step="0.0001" value="1" style="width:700px !important;">
	<input type="number" id="speedInput" min="0.0001" step="0.0001" value="1">
	</div>

	<div class="control-group">
	<label for="volumeRange">音量：</label>
	<input type="range" id="volumeRange" min="0" max="1" step="0.01" value="1">
	<input type="number" id="volumeInput" min="0" max="1" step="0.01" value="1">
	</div>

	<div class="control-group">
	<label for="loopCheckbox">ループ再生：</label>
	<input type="checkbox" id="loopCheckbox" checked>
	</div>

	<!-- 字幕設定セクション -->
	<div class="subtitle-settings">
	<div class="control-group">
	<label for="subtitleToggle">字幕表示：</label>
	<input type="checkbox" id="subtitleToggle" checked>
	</div>
	<div class="control-group">
	<label for="subtitleSize">文字サイズ：</label>
	<input type="range" id="subtitleSize" min="0.5" max="2" step="0.1" value="1">
	<input type="number" id="subtitleSizeInput" min="0.5" max="2" step="0.1" value="1">
	</div>
	<div class="control-group">
	<label for="subtitleTrack">字幕トラック：</label>
	<select id="subtitleTrack">
	<option value="v.vtt">日本語</option>
	<option value="">字幕なし</option>
	</select>
	</div>
	</div>

	<button onclick="goFullscreen()">全画面</button>
	</div>

	<div class="video-container">
	<video id="videoPlayer" src="v.mp4">
	<track id="subtitleTrackElement" kind="subtitles" src="v.vtt" srclang="ja" label="日本語" default>
	</video>
	<div class="custom-controls">
	<div class="progress-container" id="progressContainer">
	<div class="progress-bar" id="progressBar"></div>
	</div>
	<div class="buttons-container">
	<div class="left-controls">
	<button class="control-btn" id="playPauseBtn">▶</button>
	<span class="time-display" id="timeDisplay">00:00 / 00:00</span>
	</div>
	<div class="right-controls">
	<div class="volume-container">
	<button class="control-btn" id="volumeBtn">🔊</button>
	<input type="range" class="volume-slider" id="volumeSlider" min="0" max="1" step="0.01" value="1">
	</div>
	<button class="control-btn" id="subtitleBtn" title="字幕">📝</button>
	<button class="control-btn" id="fullscreenBtn">⛶</button>
	</div>
	</div>
	</div>
	</div>

	<script>
	const video = document.getElementById('videoPlayer');
	const videoSelect = document.getElementById('videoSelect');
	const speedRange = document.getElementById('speedRange');
	const speedInput = document.getElementById('speedInput');
	const volumeRange = document.getElementById('volumeRange');
	const volumeInput = document.getElementById('volumeInput');
	const loopCheckbox = document.getElementById('loopCheckbox');
	const playPauseBtn = document.getElementById('playPauseBtn');
	const progressBar = document.getElementById('progressBar');
	const progressContainer = document.getElementById('progressContainer');
	const timeDisplay = document.getElementById('timeDisplay');
	const volumeBtn = document.getElementById('volumeBtn');
	const volumeSlider = document.getElementById('volumeSlider');
	const fullscreenBtn = document.getElementById('fullscreenBtn');
	const subtitleBtn = document.getElementById('subtitleBtn');
	const subtitleToggle = document.getElementById('subtitleToggle');
	const subtitleSize = document.getElementById('subtitleSize');
	const subtitleSizeInput = document.getElementById('subtitleSizeInput');
	const subtitleTrack = document.getElementById('subtitleTrack');
	const subtitleTrackElement = document.getElementById('subtitleTrackElement');
	const videoContainer = document.querySelector('.video-container');

	// 初期設定
	video.controls = false;
	let isDragging = false;
	let subtitlesEnabled = true;
	let normalVideoWidth = videoContainer.clientWidth;

	function updatePlaybackRate(value) {
	const speed = parseFloat(value);
	speedInput.value = speed;
	speedRange.value = speed;
	video.playbackRate = speed;
	}

	function updateVolume(value) {
	const volume = parseFloat(value);
	volumeInput.value = volume;
	volumeRange.value = volume;
	volumeSlider.value = volume;
	video.volume = volume;

	if (volume === 0) {
	volumeBtn.textContent = '🔇';
	} else if (volume < 0.5) {
	volumeBtn.textContent = '🔈';
	} else {
	volumeBtn.textContent = '🔊';
	}
	}

	function handleVideoChange() {
	const selected = videoSelect.value;

	if (selected === 'v-2.mp4') {
	const confirmPlay = confirm("この動画は音量が大きいです。あらかじめ、デバイスの音量をある程度下げてください。また、音割れが起きます。再生してもよろしいですか？");
	if (!confirmPlay) {
	videoSelect.value = video.src.split('/').pop();
	return;
	}
	}

	video.src = selected;
	video.load();
	video.play().then(() => {
	playPauseBtn.textContent = '⏸';
	}).catch(e => console.log(e));
	}

	function togglePlayPause() {
	if (video.paused) {
	video.play();
	playPauseBtn.textContent = '⏸';
	} else {
	video.pause();
	playPauseBtn.textContent = '▶';
	}
	}

	function updateProgress() {
	const percent = (video.currentTime / video.duration) * 100;
	progressBar.style.width = `${percent}%`;

	const currentMinutes = Math.floor(video.currentTime / 60);
	const currentSeconds = Math.floor(video.currentTime % 60).toString().padStart(2, '0');
	const durationMinutes = Math.floor(video.duration / 60);
	const durationSeconds = Math.floor(video.duration % 60).toString().padStart(2, '0');

	timeDisplay.textContent = `${currentMinutes}:${currentSeconds} / ${durationMinutes}:${durationSeconds}`;
	}

	function setProgress(e) {
	const width = progressContainer.clientWidth;
	const clickX = e.offsetX;
	const duration = video.duration;
	video.currentTime = (clickX / width) * duration;
	}

	function toggleMute() {
	video.muted = !video.muted;
	if (video.muted) {
	volumeBtn.textContent = '🔇';
	volumeSlider.value = 0;
	} else {
	updateVolume(video.volume);
	}
	}

	function handleVolumeChange() {
	video.muted = false;
	updateVolume(volumeSlider.value);
	}

	function goFullscreen() {
	if (videoContainer.requestFullscreen) {
	videoContainer.requestFullscreen();
	} else if (videoContainer.webkitRequestFullscreen) {
	videoContainer.webkitRequestFullscreen();
	} else if (videoContainer.msRequestFullscreen) {
	videoContainer.msRequestFullscreen();
	}
	}

	// 全画面変更時の字幕サイズ調整
	function updateSubtitleScaleForFullscreen() {
	if (document.fullscreenElement \|\| document.webkitFullscreenElement \|\|
	document.mozFullScreenElement \|\| document.msFullscreenElement) {
	// 全画面モード
	const fullscreenWidth = window.innerWidth;
	const scaleFactor = fullscreenWidth / normalVideoWidth;
	document.documentElement.style.setProperty('--fullscreen-scale', scaleFactor);
	} else {
	// 通常モード
	document.documentElement.style.setProperty('--fullscreen-scale', 1);
	}
	}

	// 字幕関連の関数
	function toggleSubtitles() {
	subtitlesEnabled = subtitleToggle.checked;
	subtitleTrackElement.track.mode = subtitlesEnabled ? 'showing' : 'hidden';
	subtitleBtn.style.color = subtitlesEnabled ? '#00ccff' : '#666';
	}

	function updateSubtitleSize(value) {
	const size = parseFloat(value);
	subtitleSizeInput.value = size;
	subtitleSize.value = size;

	// CSS変数で字幕サイズを制御
	document.documentElement.style.setProperty('--subtitle-scale', size);

	// VTTCueのlineプロパティには数値のみを設定（'bottom'は無効）
	const track = subtitleTrackElement.track;
	if (track && track.cues) {
	for (let i = 0; i < track.cues.length; i++) {
	// 画面下部に表示するため、適切な数値を設定（例: 90）
	track.cues[i].line = 90;
	track.cues[i].snapToLines = false; // ラインスナップを無効に
	}
	}
	}

	function changeSubtitleTrack() {
	const selectedTrack = subtitleTrack.value;
	subtitleTrackElement.src = selectedTrack;
	subtitleTrackElement.track.mode = selectedTrack && subtitlesEnabled ? 'showing' : 'hidden';

	// トラック変更後に再度読み込み
	video.textTracks[0].mode = 'hidden';
	if (selectedTrack) {
	video.textTracks[0].mode = subtitlesEnabled ? 'showing' : 'hidden';
	}
	}

	function toggleSubtitleMenu() {
	const subtitleSettings = document.querySelector('.subtitle-settings');
	subtitleSettings.style.display = subtitleSettings.style.display === 'none' ? 'block' : 'none';
	}

	// イベントリスナー
	videoSelect.addEventListener('change', handleVideoChange);

	['input', 'change', 'mouseup'].forEach(eventName => {
	speedRange.addEventListener(eventName, () => updatePlaybackRate(speedRange.value));
	volumeRange.addEventListener(eventName, () => updateVolume(volumeRange.value));
	subtitleSize.addEventListener(eventName, () => updateSubtitleSize(subtitleSize.value));
	});

	speedInput.addEventListener('input', () => updatePlaybackRate(speedInput.value));
	volumeInput.addEventListener('input', () => updateVolume(volumeInput.value));
	subtitleSizeInput.addEventListener('input', () => updateSubtitleSize(subtitleSizeInput.value));

	loopCheckbox.addEventListener('change', () => {
	video.loop = loopCheckbox.checked;
	});

	subtitleToggle.addEventListener('change', toggleSubtitles);
	subtitleTrack.addEventListener('change', changeSubtitleTrack);
	subtitleBtn.addEventListener('click', toggleSubtitleMenu);

	playPauseBtn.addEventListener('click', togglePlayPause);
	video.addEventListener('click', togglePlayPause);
	video.addEventListener('play', () => playPauseBtn.textContent = '⏸');
	video.addEventListener('pause', () => playPauseBtn.textContent = '▶');
	video.addEventListener('timeupdate', updateProgress);
	progressContainer.addEventListener('click', setProgress);
	progressContainer.addEventListener('mousedown', () => isDragging = true);
	document.addEventListener('mouseup', () => isDragging = false);
	progressContainer.addEventListener('mousemove', (e) => isDragging && setProgress(e));
	volumeBtn.addEventListener('click', toggleMute);
	volumeSlider.addEventListener('input', handleVolumeChange);
	fullscreenBtn.addEventListener('click', goFullscreen);

	// 全画面変更イベントを監視
	document.addEventListener('fullscreenchange', updateSubtitleScaleForFullscreen);
	document.addEventListener('webkitfullscreenchange', updateSubtitleScaleForFullscreen);
	document.addEventListener('mozfullscreenchange', updateSubtitleScaleForFullscreen);
	document.addEventListener('MSFullscreenChange', updateSubtitleScaleForFullscreen);

	video.addEventListener('loadedmetadata', () => {
	updatePlaybackRate(speedRange.value);
	updateVolume(volumeRange.value);
	updateSubtitleSize(subtitleSize.value);
	video.loop = loopCheckbox.checked;
	toggleSubtitles();
	updateProgress();
	// 通常時の動画幅を記録
	normalVideoWidth = videoContainer.clientWidth;
	});

	// CSS変数を設定
	document.documentElement.style.setProperty('--subtitle-scale', '1');
	document.documentElement.style.setProperty('--subtitle-border-radius', '10px');
	document.documentElement.style.setProperty('--fullscreen-scale', '1');
	</script>
	</body>
	</html>