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James
967ebe69cd
Address @vanceingalls review on #848: the mp4-h264-sdr sibling fixture explains the crossfade-straddles-frame-30 and continuous-rotation chunk-seam design choices inline; mov-prores didn't. Add the parallel comment so the next contributor reading either fixture finds the same context. Notes specifically that ProRes is intra-only and therefore exercises the QuickTime atom / -c copy contract rather than frame-level state continuity. 🤖 Generated with [Claude Code](https://claude.com/claude-code)
110 lines
3.2 KiB
HTML
110 lines
3.2 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 content="width=device-width, initial-scale=1.0" name="viewport" />
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<title>mov ProRes distributed fixture</title>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.12.2/gsap.min.js"></script>
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<style>
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@import url("https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&display=swap");
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body,
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html {
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margin: 0;
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padding: 0;
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width: 640px;
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height: 360px;
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/* Transparent background so the mov's alpha channel carries real data. */
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background: transparent;
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overflow: hidden;
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font-family: "Space Mono", monospace;
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}
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#main-comp {
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position: relative;
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width: 640px;
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height: 360px;
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}
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.label {
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position: absolute;
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top: 22%;
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left: 50%;
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transform: translateX(-50%);
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font-size: 18px;
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letter-spacing: 4px;
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color: #94a3b8;
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text-transform: uppercase;
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}
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.title {
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position: absolute;
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top: 50%;
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left: 50%;
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transform: translate(-50%, -50%);
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font-family: "Space Mono", monospace;
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font-size: 56px;
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font-weight: 700;
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color: #6366f1;
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white-space: nowrap;
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}
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.stage {
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position: absolute;
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inset: 0;
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}
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.icon {
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position: absolute;
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bottom: 18%;
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left: 50%;
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transform: translate(-50%, 0);
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width: 48px;
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height: 48px;
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}
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</style>
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</head>
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<body>
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<div
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id="main-comp"
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data-composition-id="main-comp"
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data-width="640"
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data-height="360"
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data-start="0"
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data-duration="2"
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>
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<div class="stage" id="stage-a">
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<div class="label">PHASE</div>
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<div class="title" id="title-a">PRORES ONE</div>
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</div>
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<div class="stage" id="stage-b" style="opacity: 0">
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<div class="label">PHASE</div>
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<div class="title" id="title-b">PRORES TWO</div>
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</div>
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<svg class="icon" viewBox="0 0 48 48" xmlns="http://www.w3.org/2000/svg" id="icon">
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<circle cx="24" cy="24" r="18" fill="none" stroke="#6366f1" stroke-width="4" />
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<circle cx="24" cy="24" r="6" fill="#6366f1" />
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</svg>
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</div>
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<script>
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// Same chunk-seam stressors as the mp4 siblings: a crossfade straddling
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// the frame-30 seam (0.9-1.1s = frames 27-33) and a continuous icon
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// rotation across every chunk boundary. The point with ProRes is the
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// QuickTime atom contract — frame-level continuity is structurally
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// satisfied because ProRes is intra-only.
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const tl = gsap.timeline({ paused: true });
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window.__timelines = window.__timelines || {};
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window.__timelines["main-comp"] = tl;
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const stageA = document.getElementById("stage-a");
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const stageB = document.getElementById("stage-b");
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const icon = document.getElementById("icon");
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tl.to(stageA, { opacity: 0, duration: 0.2, ease: "none" }, 0.9);
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tl.to(stageB, { opacity: 1, duration: 0.2, ease: "none" }, 0.9);
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tl.to(icon, { rotation: 360, duration: 2, ease: "none" }, 0);
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</script>
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</body>
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</html>
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