mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-09-14 18:01:20 +08:00
Miguel Ángel
31e8144304
## Summary - preserve alpha for render-injected video frames by detecting alpha streams with ffprobe and extracting alpha video frames as PNG - keep `<video loop>` semantics through static parsing, compiler duration resolution, browser media discovery, and render frame lookup - fail embedded preview startup before opening a broken browser page when the Studio bundle is missing - align snapshot frame injection with looped media timing and VP9 alpha extraction ## Why The Studio preview and rendered MP4 could disagree for timed transparent looped videos. The Comfy funding composition exposed two separate parity bugs: render-injected frames needed alpha-preserving PNG extraction, and the compiler was clamping a looped `data-duration="4"` video down to the 3.125s source duration. After the first source cycle, render lookup treated the video as inactive, hid the native video, and produced the blank polygon/glow the user saw around the rounded `0:03` mark. `hyperframes lint` and `hyperframes validate` did not catch this because they check syntax/load/console/accessibility, not preview-vs-render visual parity. This PR adds regression coverage for the compiler loop-duration path and frame lookup path. ## Verification - `bun run --filter @hyperframes/core test -- src/compiler/timingCompiler.test.ts src/compiler/htmlCompiler.test.ts` - `bun test packages/producer/src/services/htmlCompiler.test.ts` - `bun run --filter @hyperframes/engine test -- videoFrameExtractor ffprobe` - `bun run --filter @hyperframes/core typecheck` - `bun run --filter @hyperframes/engine typecheck` - `bun run --filter @hyperframes/producer typecheck` - `bun run --filter @hyperframes/cli typecheck` - `bun run lint` - `bun run format:check ...` on touched files - Comfy project: `node packages/cli/dist/cli.js validate` -> no console errors, 44 text elements pass WCAG AA - Comfy project patched render from source: `/tmp/comfy-render-compare/fixed6-comfy.mp4`, 1920x1080, 30fps, 21.8s, 654 frames - 3.00s-3.97s render contact sheet: `/tmp/comfy-render-compare/fixed6-window-contact.png` - targeted fixed render capture at 3.733s: `/tmp/comfy-render-compare/probe-capture-fixed/captured/frame_000112.jpg` - agent-browser Studio proof screenshot at 3.7s: `/tmp/comfy-render-compare/agent-browser-studio-3_7-fixed.png` - agent-browser-driven recording of 3s seek pass: `/tmp/comfy-render-compare/agent-browser-wysiwyg-3s-fixed.webm` Note: `bun run --filter @hyperframes/cli dev -- validate` is blocked in source mode by the existing `contrast-audit.browser.js` default-export loader issue; packaged `node packages/cli/dist/cli.js validate` passes for this project.