# Sgc Video Chapter Render

> Render a chapter project as a transparent ProRes 4444 overlay or burn it into the source video with FFmpeg. Use when the user asks to generate, export, render, encode, or press a chapter progress bar into video.

- Skill: `lovstudio/sgc-video-chapter-render` (Agent Skill)
- Install (CLI): `npx skillmds@latest add lovstudio/sgc-video-chapter-render`
- Raw SKILL.md: https://api.skillmd.com/api/skills/lovstudio/sgc-video-chapter-render/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: lovstudio (https://skillmd.com/u/lovstudio)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/lovstudio/sgc-video-chapter-render

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# Chapter Render

1. Validate the project JSON.
2. Confirm `ffmpeg`, `ffprobe`, and Python Pillow are available.
3. Run `../../scripts/render_chapter_bar.py overlay` for an alpha MOV.
4. Inspect the output pixel format and duration with `ffprobe`.
5. Run `../../scripts/render_chapter_bar.py burn` for a final MP4.
6. Confirm the final MP4 keeps audio and matches the source dimensions.

Render the progress fill continuously across duration-proportional segments.
Keep title plates chapter-specific and use the font file from project style when
provided.