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JamesandClaude Opus 4.6
a146c9e527
- New regression test `webm-transparency`: minimal transparent composition
rendered to WebM, validates VP9 codec and visual quality at 100
checkpoints against golden baseline
- Extend regression harness: `renderConfig.format` field ("mp4" | "webm"),
format-aware output paths and snapshot filenames
- Fix `extractMonoPcm16` to gracefully handle videos without audio
streams (WebM without audio was throwing instead of returning empty)
- Unit tests for `getEncoderPreset()`: VP9/yuva420p for WebM,
h264/yuv420p for MP4, preset mapping, quality preservation
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
50 lines
1.6 KiB
HTML
50 lines
1.6 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<style>
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* { margin: 0; padding: 0; }
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html, body { background: transparent; overflow: hidden; }
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</style>
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</head>
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<body>
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<div id="root" data-composition-id="main" data-start="0" data-duration="2" data-width="640" data-height="360" style="width: 640px; height: 360px; background: transparent; position: relative">
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<!-- Semi-transparent red box that animates across the frame -->
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<div id="box" data-start="0" data-duration="2" data-track-index="0" style="
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width: 120px;
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height: 120px;
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background: rgba(255, 0, 0, 0.7);
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border-radius: 16px;
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position: absolute;
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top: 120px;
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left: 50px;
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"></div>
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<!-- White text with transparent background -->
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<div id="label" data-start="0.5" data-duration="1.5" data-track-index="1" style="
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font-family: sans-serif;
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font-size: 32px;
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font-weight: bold;
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color: white;
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text-shadow: 0 2px 8px rgba(0,0,0,0.5);
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position: absolute;
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top: 280px;
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left: 50px;
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opacity: 0;
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">Overlay Test</div>
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<script src="https://cdn.jsdelivr.net/npm/gsap@3/dist/gsap.min.js"></script>
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</div>
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<script>window.__timelines = window.__timelines || {};
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const tl = gsap.timeline({ paused: true });
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// Animate box sliding right
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tl.to("#box", { left: 470, duration: 2, ease: "power2.inOut" }, 0);
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// Fade in label
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tl.to("#label", { opacity: 1, duration: 0.5, ease: "power2.out" }, 0.5);
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window.__timelines["main"] = tl;</script></body>
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</html>
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