02065d9c63
This commit introduces a new interactive demo that performs real-time video keying using HTML5 Canvas.
The implementation processes video frames pixel by pixel to make dark areas transparent, simulating a chroma key effect.
The keyed video is then composited over a background image.
Features:
- An interactive control panel to adjust keying (threshold, softness) and transformation (position, scale, rotation,
opacity) parameters in real-time.
- Keyboard shortcuts for resetting parameters ('R') and toggling the control panel ('C').
- Graceful handling of potential cross-origin errors when processing video frames.
98 lines
3.2 KiB
HTML
98 lines
3.2 KiB
HTML
<!DOCTYPE html>
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<html lang="zh-CN">
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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" />
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<title>Canvas 实时抠像（可控面板）</title>
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<script src="https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4"></script>
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<style type="text/tailwindcss">
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@import "tailwindcss";
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@theme {
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--color-default: #4f46e5;
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--color-success: #10b981;
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--color-warning: #f59e0b;
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--color-danger: #ef4444;
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}
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canvas#mainCanvas {
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image-rendering: optimizeQuality;
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}
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</style>
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</head>
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<body class="min-h-screen flex items-center content-center">
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<div class="stage" id="stage" class="relative w-full overflow-hidden">
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<canvas id="mainCanvas" class="block w-full h-auto"></canvas>
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<!-- 来源资源：替换为你自己的文件，若跨域请加 crossorigin="anonymous" 并确保服务器允许 CORS -->
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<video
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id="video"
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class="hidden"
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playsinline
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muted
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loop
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autoplay
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src="赵子龙元帅-竖屏.mp4"
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></video>
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<!-- Controls 面板（可关闭） -->
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<div
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class="absolute right-2 top-2 w-[320px] bg-white p-2 rounded-md hidden"
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id="controlsPanel"
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role="region"
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aria-label="视频抠像控制面板"
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>
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<h4>
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控制面板
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<button class="close-btn" id="closePanel" title="关闭面板">✕</button>
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</h4>
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<div class="grid grid-cols-2 grid-rows-7">
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<label>黑色阈值: <span id="thVal">30</span></label>
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<input type="range" id="threshold" min="0" max="120" value="30" />
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<label>羽化（softness）: <span id="sfVal">30</span></label>
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<input type="range" id="softness" min="0" max="120" value="30" />
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<label>左侧偏移 X (px): <span id="marginVal">40</span></label>
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<input type="range" id="leftMargin" min="0" max="800" value="40" />
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<label>顶部偏移 Y (px): <span id="topVal">0</span></label>
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<input type="range" id="topOffset" min="-400" max="400" value="0" />
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<label>缩放（%）: <span id="scaleVal">90</span></label>
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<input type="range" id="scale" min="20" max="200" value="90" />
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<label>旋转（deg）: <span id="rotVal">0</span></label>
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<input type="range" id="rotation" min="-45" max="45" value="0" />
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<label>不透明度: <span id="opaVal">100</span>%</label>
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<input type="range" id="opacity" min="0" max="100" value="100" />
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</div>
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<div style="display: flex; gap: 6px; margin-top: 8px">
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<button
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id="resetBtn"
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class="flex-1 bg-danger rounded-md cursor-pointer"
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>
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重置 (R)
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</button>
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<button
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id="applyHint"
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class="flex-1 bg-warning rounded-md cursor-pointer"
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>
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帮助
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</button>
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</div>
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</div>
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<!-- 当面板关闭时显示的打开按钮 -->
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<button id="openBtn" class="open-controls" style="display: none">
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打开控制面板
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</button>
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</div>
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<script src="background.js"></script>
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</body>
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</html>
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