Joachim Hummel
264b2b3e3b
Bei GRABBER_ALWAYS_ON=0 kappte kurzes Zuschauer-Aus (<img>-Reload der Auto-Recovery) die Kameraverbindung -> Reconnect -> Tracker/Zaehlzustand wurde zurueckgesetzt. Bei ~1 FPS riss das die Zaehlung auseinander. - Grabber: Karenzzeit (VIEWER_GRACE_SEC, Default 15s) bevor die Kamera bei fehlenden Zuschauern freigegeben wird -> kein Reconnect-Churn - Frontend: Overlay/Reload erst nach ~6s echtem Ausfall (3 Polls), nicht bei einzelnen langsamen Frames -> kein Verbindungs-Churn Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
329 lines
12 KiB
HTML
329 lines
12 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Webcam Feed</title>
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<script>
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(function(){var t=localStorage.getItem('theme')||((window.matchMedia&&window.matchMedia('(prefers-color-scheme: dark)').matches)?'dark':'light');document.documentElement.setAttribute('data-theme',t);})();
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</script>
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<style>
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:root {
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--bg: #f0f0f0; --fg: #213547; --panel: #ffffff;
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--border: #cccccc; --muted: #555555;
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}
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:root[data-theme="dark"] {
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--bg: #16181c; --fg: #e3e3e3; --panel: #23262b;
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--border: #3a3f46; --muted: #9aa0a6;
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}
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body {
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display: flex;
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flex-direction: column;
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justify-content: center;
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align-items: center;
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min-height: 100vh;
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margin: 0;
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background-color: var(--bg);
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color: var(--fg);
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transition: background-color 0.3s, color 0.3s;
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padding: 20px;
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}
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.theme-toggle {
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position: fixed;
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top: 12px;
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right: 12px;
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padding: 8px 12px;
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font-size: 18px;
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line-height: 1;
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border: 1px solid var(--border);
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border-radius: 8px;
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background-color: var(--panel);
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color: var(--fg);
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cursor: pointer;
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z-index: 1000;
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transition: background-color 0.3s, color 0.3s;
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}
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.theme-toggle:hover {
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border-color: var(--muted);
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}
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.offline-overlay {
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position: absolute;
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top: 0;
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left: 0;
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width: 1020px;
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height: 600px;
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display: none;
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flex-direction: column;
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align-items: center;
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justify-content: center;
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gap: 8px;
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background: rgba(0, 0, 0, 0.78);
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color: #fff;
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border-radius: 8px;
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text-align: center;
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z-index: 5;
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}
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.offline-overlay.show { display: flex; }
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.offline-overlay .icon { font-size: 54px; }
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.offline-overlay .msg { font-size: 22px; font-weight: 600; }
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.offline-overlay .sub { font-size: 14px; opacity: 0.8; }
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.video-container {
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position: relative;
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width: 1020px;
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height: 600px;
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}
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#videoFeed {
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width: 1020px;
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height: 600px;
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border: 2px solid var(--border);
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border-radius: 8px;
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box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
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display: block;
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}
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#lineCanvas {
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position: absolute;
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top: 0;
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left: 0;
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width: 1020px;
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height: 600px;
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cursor: crosshair;
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pointer-events: none;
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}
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#lineCanvas.active {
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pointer-events: auto;
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}
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.controls {
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margin-top: 20px;
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display: flex;
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gap: 10px;
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flex-wrap: wrap;
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justify-content: center;
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}
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button {
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padding: 10px 20px;
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font-size: 16px;
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border: none;
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border-radius: 5px;
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cursor: pointer;
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background-color: #007bff;
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color: white;
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transition: background-color 0.3s;
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}
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button:hover {
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background-color: #0056b3;
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}
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button.active {
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background-color: #28a745;
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}
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button.danger {
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background-color: #dc3545;
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}
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button.danger:hover {
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background-color: #c82333;
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}
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a {
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margin-top: 20px;
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text-decoration: none;
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color: #007bff;
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font-size: 18px;
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}
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a:hover {
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text-decoration: underline;
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}
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.info {
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margin-top: 10px;
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color: var(--muted);
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font-size: 14px;
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}
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</style>
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</head>
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<body>
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<button id="themeToggle" class="theme-toggle" onclick="toggleTheme()" aria-label="Theme umschalten" title="Hell/Dunkel umschalten">🌙</button>
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<h1>Webcam Object Detection</h1>
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<div class="video-container">
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<img id="videoFeed" src="{{ url_for('webcam_feed') }}" />
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<canvas id="lineCanvas"></canvas>
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<div id="offlineOverlay" class="offline-overlay">
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<div class="icon">📷</div>
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<div class="msg">Kamera offline</div>
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<div class="sub">Versuche neu zu verbinden…</div>
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</div>
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</div>
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<div class="controls">
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<button id="setLineBtn">Zähllinie setzen</button>
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<button id="resetCountBtn" class="danger">Zähler zurücksetzen</button>
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</div>
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<div class="info" id="infoText">Klicke auf "Zähllinie setzen" und dann zweimal auf das Video, um die Zähllinie zu definieren.</div>
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<a href="/">Back to Home</a>
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<script>
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const streamId = "{{ stream_id | default('') }}";
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const canvas = document.getElementById('lineCanvas');
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const ctx = canvas.getContext('2d');
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const setLineBtn = document.getElementById('setLineBtn');
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const resetCountBtn = document.getElementById('resetCountBtn');
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const infoText = document.getElementById('infoText');
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let isSettingLine = false;
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let firstPoint = null;
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let currentLine = null;
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// Load existing line from server
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fetch('/api/get_line')
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.then(res => res.json())
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.then(data => {
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currentLine = data;
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drawLine();
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});
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setLineBtn.addEventListener('click', () => {
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isSettingLine = !isSettingLine;
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if (isSettingLine) {
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setLineBtn.textContent = 'Abbrechen';
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setLineBtn.classList.add('active');
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canvas.classList.add('active');
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firstPoint = null;
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infoText.textContent = 'Klicke auf den Startpunkt der Zähllinie...';
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} else {
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setLineBtn.textContent = 'Zähllinie setzen';
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setLineBtn.classList.remove('active');
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canvas.classList.remove('active');
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firstPoint = null;
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infoText.textContent = 'Klicke auf "Zähllinie setzen" und dann zweimal auf das Video, um die Zähllinie zu definieren.';
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drawLine();
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}
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});
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canvas.addEventListener('click', (e) => {
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if (!isSettingLine) return;
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const rect = canvas.getBoundingClientRect();
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const x = Math.round(e.clientX - rect.left);
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const y = Math.round(e.clientY - rect.top);
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if (!firstPoint) {
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firstPoint = { x, y };
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infoText.textContent = 'Klicke auf den Endpunkt der Zähllinie...';
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drawTemporaryPoint(x, y);
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} else {
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currentLine = { x1: firstPoint.x, y1: firstPoint.y, x2: x, y2: y };
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// Send line to server
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fetch('/api/set_line', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify(currentLine)
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})
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.then(res => res.json())
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.then(data => {
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console.log('Line set:', data);
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infoText.textContent = 'Zähllinie erfolgreich gesetzt!';
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setTimeout(() => {
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infoText.textContent = 'Klicke auf "Zähllinie setzen" und dann zweimal auf das Video, um die Zähllinie zu definieren.';
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}, 2000);
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});
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isSettingLine = false;
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setLineBtn.textContent = 'Zähllinie setzen';
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setLineBtn.classList.remove('active');
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canvas.classList.remove('active');
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firstPoint = null;
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drawLine();
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}
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});
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resetCountBtn.addEventListener('click', () => {
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if (confirm('Zähler zurücksetzen?')) {
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fetch('/api/reset_count', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ stream_id: streamId })
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})
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.then(res => {
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if (!res.ok) {
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throw new Error('Zurücksetzen fehlgeschlagen');
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}
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return res.json();
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})
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.then(() => {
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infoText.textContent = 'Zähler wird zurückgesetzt...';
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setTimeout(() => {
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infoText.textContent = 'Klicke auf "Zähllinie setzen" und dann zweimal auf das Video, um die Zähllinie zu definieren.';
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}, 2000);
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})
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.catch(err => alert(err.message));
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}
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});
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function drawLine() {
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ctx.clearRect(0, 0, canvas.width, canvas.height);
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if (currentLine) {
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ctx.strokeStyle = 'rgba(255, 255, 0, 0.8)';
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ctx.lineWidth = 3;
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ctx.setLineDash([10, 10]);
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ctx.beginPath();
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ctx.moveTo(currentLine.x1, currentLine.y1);
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ctx.lineTo(currentLine.x2, currentLine.y2);
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ctx.stroke();
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ctx.setLineDash([]);
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}
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}
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function drawTemporaryPoint(x, y) {
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ctx.clearRect(0, 0, canvas.width, canvas.height);
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drawLine();
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ctx.fillStyle = 'rgba(255, 255, 0, 0.8)';
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ctx.beginPath();
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ctx.arc(x, y, 5, 0, 2 * Math.PI);
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ctx.fill();
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}
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// Redraw line periodically in case it gets cleared
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setInterval(() => {
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if (!isSettingLine && currentLine) {
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drawLine();
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}
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}, 100);
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// --- Kamera-Online-Status pollen + Auto-Recovery des Streams ---
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const videoFeed = document.getElementById('videoFeed');
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const offlineOverlay = document.getElementById('offlineOverlay');
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let offlineStreak = 0; // aufeinanderfolgende Offline-Abfragen
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let reloadPending = false; // erst nach echtem Ausfall den Stream neu laden
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const OFFLINE_POLLS = 3; // ~6s -> erst dann "wirklich offline"
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async function checkCamStatus() {
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let online = false;
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try {
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const res = await fetch('/api/webcam_status', { cache: 'no-store' });
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online = (await res.json()).online;
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} catch (e) {
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online = false;
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}
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if (online) {
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// Nur nach einem laengeren Ausfall den MJPEG-Stream neu anstossen
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// (sonst Verbindungs-/Reconnect-Churn bei kurzen Aussetzern).
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if (reloadPending) {
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videoFeed.src = "{{ url_for('webcam_feed') }}?t=" + Date.now();
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reloadPending = false;
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}
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offlineStreak = 0;
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offlineOverlay.classList.remove('show');
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} else {
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offlineStreak++;
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if (offlineStreak >= OFFLINE_POLLS) {
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offlineOverlay.classList.add('show');
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reloadPending = true;
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}
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}
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}
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checkCamStatus();
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setInterval(checkCamStatus, 2000);
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</script>
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<script>
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function applyThemeBtn(){var d=document.documentElement.getAttribute('data-theme')==='dark';var b=document.getElementById('themeToggle');if(b)b.textContent=d?'☀️':'🌙';}
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function toggleTheme(){var n=document.documentElement.getAttribute('data-theme')==='dark'?'light':'dark';document.documentElement.setAttribute('data-theme',n);localStorage.setItem('theme',n);applyThemeBtn();}
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applyThemeBtn();
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</script>
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</body>
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</html>
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