What problem does it solve?
It turns a fully annotated video project—edit ledger, subtitles, and HTML visual layers—into a single finished mp4 file, replacing manual timeline rendering and frame-by-frame verification.
Core Features & Use Cases
- Two-step export: Run a dry-run plan first to report duration, frame counts, subtitle screens, and overlay layers, then execute the real assemble → overlay → compose → verify pipeline.
- Resolution guidance: Inspect source resolution and choose scale 1 for native Retina footage or scale 2 for low-resolution sources, since subtitles and animations are redrawn at output size.
- Source replacement workflow: Swap in a higher-quality recording of the same session by verifying identical duration and audio hash, then updating source fingerprints in project files.
- Acceptance checks: Extract frames from the rendered mp4 with ffmpeg to visually verify zoom segments, animations, and subtitle-only sections.
- Use Case: After finishing word-level cuts, subtitles, and visual layers for a talking-head screen recording, run the export to burn everything into a deliverable mp4 and confirm the pixels match the plan.
Quick Start
Use the chengfeng-export skill to export this project into a final mp4: run the dry-run plan first, then render, then extract frames from the output for visual acceptance.
