Video podcast maker

REQUIRED: Load Remotion Best Practices First

This skill depends on remotion-best-practices. You MUST invoke it before proceeding:

Invoke the skill/tool named: remotion-best-practices

Video Podcast Maker

Quick Start

Open your coding agent and say: "Make a video podcast about $ARGUMENTS"

Or invoke directly: /video-podcast-maker AI Agent tutorial

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Design Learning (Optional)

Extract visual design patterns from reference videos or images and apply them to new video compositions. Skip this section unless the user provides a reference video/image or asks to save/list/delete style profiles.

→ See references/design-learning.md for commands, reference-library management, style-profile management, and integration with Pre-workflow / Step 9.

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Auto Update Check

Agent behavior: Check for updates at most once per day (throttled by timestamp file). Before any shell command that reads files from this skill, resolve SKILL_DIR to the directory containing SKILL.md. If your agent exposes a built-in skill directory variable such as ${CLAUDE_SKILL_DIR}, you may map it to SKILL_DIR.

SKILL_DIR="${SKILL_DIR:-${CLAUDE_SKILL_DIR}}"
STAMP="${SKILL_DIR}/.last_update_check"
NOW=$(date +%s)
LAST=$(cat "$STAMP" 2>/dev/null || echo 0)
if [ ! -d "${SKILL_DIR}/.git" ]; then
  echo "MANUAL_INSTALL"
elif [ $((NOW - LAST)) -gt 86400 ]; then
  timeout 5 git -C "${SKILL_DIR}" fetch --quiet 2>/dev/null || true
  LOCAL=$(git -C "${SKILL_DIR}" rev-parse HEAD 2>/dev/null)
  REMOTE=$(git -C "${SKILL_DIR}" rev-parse origin/main 2>/dev/null)
  echo "$NOW" > "$STAMP"
  if [ -n "$LOCAL" ] && [ -n "$REMOTE" ] && [ "$LOCAL" != "$REMOTE" ]; then
    echo "UPDATE_AVAILABLE"
  else
    echo "UP_TO_DATE"
  fi
else
  echo "SKIPPED_RECENT_CHECK"
fi

• Update available: Ask the user whether to pull updates. Yes → git -C "${SKILL_DIR}" pull. No → continue.
• Up to date / Skipped: Continue silently.
• Manual install (no .git directory — skill was installed via tarball/zip/cp): Continue silently. Auto-update is disabled; the user must reinstall manually to update.

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Prerequisites Check

!python3 "${SKILL_DIR}/scripts/check_prereqs.py"

If MISSING reported above, see README.md for full setup instructions (install commands, API key setup, Remotion project init). The check is backend-aware: backend is resolved as TTS_BACKEND env var → user_prefs.json (global.tts.backend) → edge default, then only env vars required by that backend are validated.

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Overview

Automated pipeline for professional Bilibili horizontal knowledge videos from a topic.

Target: Bilibili horizontal video (16:9)

• Resolution: 3840×2160 (4K) or 1920×1080 (1080p)
• Style: Clean white (default)

Tech stack: Coding agent + TTS backend + Remotion + FFmpeg

Output Specs

Parameter	Horizontal (16:9)	Vertical (9:16)
Resolution	3840×2160 (4K)	2160×3840 (4K)
Frame rate	30 fps	30 fps
Encoding	H.264, 16Mbps	H.264, 16Mbps
Audio	AAC, 192kbps	AAC, 192kbps
Duration	1-15 min	60-90s (highlight)

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Execution Modes

Agent behavior: Detect user intent at workflow start:

• "Make a video about..." / no special instructions → Auto Mode
• "I want to control each step" / mentions interactive → Interactive Mode
• Default: Auto Mode

Auto Mode (Default)

Full pipeline with sensible defaults. Mandatory stop at Step 9:

1. Step 9: Launch Remotion Studio — user reviews in real-time, requests changes until satisfied
2. Step 10: Only triggered when user explicitly says "render 4K" / "render final version"

Step	Decision	Auto Default
3	Title position	top-center
5	Media assets	Skip (text-only animations)
7	Thumbnail method	Remotion-generated (16:9 + 4:3)
9	Outro animation	Pre-made MP4 (white/black by theme)
9	Preview method	Remotion Studio (mandatory)
12	Subtitles	Skip
14	Cleanup	Auto-clean temp files

Users can override any default in their initial request:

• "make a video about AI, burn subtitles" → auto + subtitles on
• "use dark theme, AI thumbnails" → auto + dark + imagen
• "need screenshots" → auto + media collection enabled

Interactive Mode

Prompts at each decision point. Activated by:

• "interactive mode" / "I want to choose each option"
• User explicitly requests control

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Technical Rules

Hard constraints for video production. Visual design remains the agent's creative freedom within these rules:

Rule	Requirement
Single Project	All videos under videos/{name}/ in user's Remotion project. NEVER create a new project per video.
4K Output	3840×2160, use scale(2) wrapper over 1920×1080 design space
Content Width	≥85% of screen width
Bottom Safe Zone	Bottom 100px reserved for subtitles
Audio Sync	All animations driven by timing.json timestamps
Thumbnail	MUST generate 16:9 (1920×1080) AND 4:3 (1200×900). Centered layout, title ≥120px, icons ≥120px, fill most of canvas. See design-guide.md.
Font	PingFang SC / Noto Sans SC for Chinese text
Studio Before Render	MUST launch remotion studio for user review. NEVER render 4K until user explicitly confirms ("render 4K", "render final").

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Additional Resources

Load these files on demand — do NOT load all at once:

• references/workflow-steps.md: Index of the 15-step workflow split across three phase files. Load at workflow start to locate which phase file to pull:
  • workflow-script.md — Pre-workflow + Startup + Steps 1-4 (scripting)
  • workflow-production.md — Steps 5-11 (media, TTS, Remotion, render, BGM)
  • workflow-publish.md — Steps 12-15 (subtitles, publish, cleanup, shorts)
• references/design-guide.md: Visual minimums, typography, layout patterns, checklists. MUST load before Step 9.
• references/design-learning.md: Extracting visual patterns from reference videos/images, style profiles. Load only when the user provides a reference or manages profiles.
• references/troubleshooting.md: Error fixes, BGM options, preference commands, preference learning. Load on error or user request.
• examples/: Real production video projects. The agent may reference these for composition structure and timing.json format.

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Directory Structure

project-root/                           # Remotion project root
├── src/remotion/                       # Remotion source
│   ├── compositions/                   # Video composition definitions
│   ├── Root.tsx                        # Remotion entry
│   └── index.ts                        # Exports
│
├── public/                             # Remotion default (unused — use --public-dir videos/{name}/)
│
├── videos/{video-name}/                # Video project assets
│   ├── topic_definition.md             # Step 1
│   ├── topic_research.md               # Step 2
│   ├── podcast.txt                     # Step 4: narration script
│   ├── podcast_audio.wav               # Step 8: TTS audio
│   ├── podcast_audio.srt               # Step 8: subtitles
│   ├── timing.json                     # Step 8: timeline
│   ├── thumbnail_*.png                 # Step 7
│   ├── output.mp4                      # Step 10
│   ├── video_with_bgm.mp4             # Step 11
│   ├── final_video.mp4                 # Step 12: final output
│   └── bgm.mp3                         # Background music
│
└── remotion.config.ts

Important: Always use --public-dir and full output path for Remotion render:

npx remotion render src/remotion/index.ts CompositionId videos/{name}/output.mp4 --public-dir videos/{name}/

Naming Rules

Video name {video-name}: lowercase English, hyphen-separated (e.g., reference-manager-comparison)

Section name {section}: lowercase English, underscore-separated, matches [SECTION:xxx]

Thumbnail naming (16:9 AND 4:3 both required):

Type	16:9	4:3
Remotion	thumbnail_remotion_16x9.png	thumbnail_remotion_4x3.png
AI	thumbnail_ai_16x9.png	thumbnail_ai_4x3.png

Public Directory

Use --public-dir videos/{name}/ for all Remotion commands. Each video's assets (timing.json, podcast_audio.wav, bgm.mp3) stay in its own directory — no copying to public/ needed. This enables parallel renders of different videos.

# All render/studio/still commands use --public-dir
npx remotion studio src/remotion/index.ts --public-dir videos/{name}/
npx remotion render src/remotion/index.ts CompositionId videos/{name}/output.mp4 --public-dir videos/{name}/ --video-bitrate 16M
npx remotion still src/remotion/index.ts Thumbnail16x9 videos/{name}/thumbnail.png --public-dir videos/{name}/

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Workflow

Progress Tracking

At Step 1 start, use your agent's task tracker (Claude Code TaskCreate / Codex todo list / equivalent) to create one task per step. Mark in_progress on start, completed on finish. Files in videos/{name}/ (e.g. podcast.txt, timing.json, output.mp4) act as the durable record of what completed — if a session is interrupted, inspect the directory to determine where to resume.

 1. Define topic direction → topic_definition.md
 2. Research topic → topic_research.md
 3. Design video sections (5-7 chapters)
 4. Write narration script → podcast.txt
 4.5. Pronunciation pre-flight (zh-CN only) → videos/{name}/phonemes.json
 5. Collect media assets → media_manifest.json
 6. Generate publish info (Part 1) → publish_info.md
 7. Generate thumbnails (16:9 + 4:3) → thumbnail_*.png
 8. Generate TTS audio → podcast_audio.wav, timing.json
 9. Create Remotion composition + Studio preview (mandatory stop)
10. Render 4K video (only on user request) → output.mp4
11. Mix background music → video_with_bgm.mp4
12. Add subtitles (optional) → final_video.mp4
13. Complete publish info (Part 2) → chapter timestamps
14. Verify output & cleanup
15. Generate vertical shorts (optional) → shorts/

Validation Checkpoints

After Step 8 (TTS):

• podcast_audio.wav exists and plays correctly
• timing.json has all sections with correct timestamps
• podcast_audio.srt encoding is UTF-8

After Step 10 (Render):

• output.mp4 resolution is 3840x2160
• Audio-video sync verified
• No black frames

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Key Commands Reference

See CLAUDE.md for the full command reference (TTS, Remotion, FFmpeg, shorts generation).

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User Preference System

Skill learns and applies preferences automatically. See references/troubleshooting.md for commands and learning details.

Storage Files

File	Purpose
user_prefs.json	Learned preferences (auto-created from template)
user_prefs.template.json	Default values
prefs_schema.json	JSON schema definition

Priority

Final = merge(Root.tsx defaults < global < topic_patterns[type] < current instructions)

User Commands

Command	Effect
"show preferences"	Show current preferences
"reset preferences"	Reset to defaults
"save as X default"	Save to topic_patterns

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Troubleshooting & Preferences

Full reference: Read references/troubleshooting.md on errors, preference questions, or BGM options.