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feat: make creator media edits render-safe (#3322)

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* feat: make creator media edits render-safe

* fix: align media playback timing

* docs: add creator editing recipes

* docs: expand creator editing guidance

* fix: unify media source offsets

* fix: scale natural media duration

* fix: preserve natural media zero spans

* fix: align compiled natural media timing

* test: classify compiler media test as integration

* fix: drop inactive media windows

* fix: unify literal timing parsing

* fix: keep browser media parsing serializable

* fix: keep page timing readers strict

* fix: close remaining preview timing gaps

* fix(core): preserve Studio voice pitch at playback speed

* chore: keep creator contract source-neutral
This commit is contained in:
Miguel Ángel
2026-08-18 10:17:02 -04:00
committed by GitHub
parent 049f5618d7
commit afafca4b96
42 changed files with 2695 additions and 307 deletions
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skills/hyperframes-core/references/tracks-and-clips.md
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@@ -43,6 +43,18 @@ When adding a new clip to an existing composition:
`data-media-start` (on `<video>`/`<audio>`) is an offset _into the source media_. Use it to skip the first few seconds of a media file without trimming the file itself.
## Cut one source into multiple ranges
For a hard cut, trim, splice, or reorder, duplicate the same video source into
multiple clip elements. Each copy selects its source range with
`data-media-start` plus `data-duration`, and places that range on the authored
timeline with `data-start`. Change the source offsets and placement order; do
not try to keyframe source cutting.
Separately authored audio gives each audio copy the identical source range and
timing as its matching video clip (`data-media-start`, `data-duration`, and
`data-start`). Video stays muted; the separate audio elements carry sound.
## Relative Timing
`data-start` accepts a clip ID instead of a number, meaning "start when that clip ends". Add `+ N` / `- N` to offset; negative produces overlap (useful for crossfades).