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docs: document HEVC input support and the preview-only codec caveat

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Miguel Angel Simon Sierra
2026-07-16 18:36:12 -04:00
parent 08dbb7db37
commit 5f2819b1e7
5 changed files with 35 additions and 2 deletions
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skills/hyperframes-core/references/variables-and-media.md
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@@ -105,3 +105,5 @@ Video elements must be muted and inline. Audio must be a separate `<audio>` elem
- For volume fades/ducking, animate `volume` on the timeline (`tl.to("#bgm", { volume: 0, duration: 1 }, "outro")`) rather than swapping `data-volume`. The runtime probes the timeline's volume keyframes and applies them identically in preview and render; `data-volume` is the static baseline for elements no tween touches.
For media duration: `<video>` and `<audio>` can omit `data-duration` if the media's intrinsic length is known and you want the full clip. Otherwise provide `data-duration` explicitly.
Input codecs: render decodes video via FFmpeg (frames are pre-extracted and injected), so HEVC/H.265 assets (8/10-bit) render correctly everywhere; only live preview depends on the browser's codec support (`lint` emits an info-level `hevc_preview_codec` note; use an H.264 proxy for authoring if preview shows black).