Files
Miguel Ángel 840f657028 feat(player): play and loop a range of a film with range-start and range-end (#4688)
* feat(player): play and loop a range of the film with range-start and range-end

The runtime takes a set-play-range control and stops on the range end frame itself.
The player wraps to range-start with loop, fires ended without it, and reports a
range cut to the film with rangeclamped. Video and __timelines players check it per tick.

* fix(player): hold a range on its last frame and let the runtime own range jumps

A runtime with the play-range capability jumps to range-start itself when a new range leaves
the playhead outside, so a stale state no longer ends the film; older runtimes keep the
player fallback, guarded until a state lands inside. Every range stop shows the last frame
before range-end; a paused playhead re-parks only when it falls outside the new range.

* fix(player): stop a range a check early and enforce its end on a video in a background tab

* test(player): share the range video setup

* fix(player): a slow frame no longer cuts a range short; a video without a range is unchanged

* fix(player): a range still stops early where video time moves once per frame

* refactor(player): cut the range look-ahead comment to one line

* fix(player): a per-frame video time rounded down still stops a range early

* test(player): pin no rounding tolerance at a film's own end

* test(studio): expect the play-range capability on control messages
2026-09-28 23:38:32 +00:00
..
2026-09-28 13:37:47 -07:00

@hyperframes/studio

Browser-based composition editor UI for Hyperframes. Provides a visual timeline, code editor, and live preview for building video compositions.

Install

npm install @hyperframes/studio

What it does

The studio is a React application with:

  • Visual timeline — drag, resize, and arrange elements on tracks
  • Code editor — edit HTML and GSAP scripts with CodeMirror (syntax highlighting, autocomplete)
  • Live preview — see changes in real time as you edit
  • Composition inspector — view and modify element properties

Development

The studio is embedded in the hyperframes preview command. To develop the studio UI itself:

cd packages/studio
bun run dev        # Start Vite dev server
bun run build      # Build for production
bun run typecheck  # Type-check

Tech stack

  • React 19, Zustand 4/5 (state management; development uses Zustand 5)
  • CodeMirror 6 (editor)
  • Tailwind CSS (styling)
  • Vite (bundler)
  • Phosphor Icons

Documentation

Full documentation: hyperframes.heygen.com/packages/studio