SKILL.md
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Script Formulas
Problem-Agitate-Solve (PAS) — 60 seconds
Section
Duration
Content
Word Count
Problem
10s
State the pain point the viewer has
~25 words
Agitate
10s
Show why it's worse than they think
~25 words
Solution
15s
Introduce your product/idea
~35 words
How It Works
20s
Show 3 key steps or features
~50 words
CTA
5s
One clear next action
~12 words
Before-After-Bridge (BAB) — 90 seconds
Section
Duration
Content
Before
15s
Show the current frustrating state
After
15s
Show the ideal outcome
Bridge
40s
Explain how your product gets them there
Social Proof
10s
Quick stat or testimonial
CTA
10s
Clear next step
Feature Spotlight — 30 seconds (social)
Section
Duration
Content
Hook
3s
Surprising fact or question
Feature
15s
Show one feature solving one problem
Result
7s
The outcome/benefit
CTA
5s
Try it / Learn more
Pacing Rules
Content Type
Words Per Minute
Notes
Standard narration
150 wpm
Conversational pace
Complex/technical
120 wpm
Allow processing time
Energetic/social
170 wpm
Faster for short-form
Children's content
100 wpm
Clear and slow
Key rule: 1 scene per key message. Don't pack multiple ideas into one visual.
Scene Duration Guidelines
- Establishing shot: 3-5 seconds
- Feature demonstration: 5-8 seconds
- Text/stat on screen: 3-4 seconds (must be readable)
- Transition: 0.5-1 second
- CTA screen: 3-5 seconds
Visual Production
Scene Types
# Product in context
belt app run google/veo-3-1-fast --input '{
"prompt": "Clean product demonstration video, hands typing on a laptop showing a dashboard interface, bright modern office, soft natural lighting, professional"
}'
# Abstract concept visualization
belt app run bytedance/seedance-2-0 --input '{
"prompt": "Abstract motion graphics, colorful data streams connecting floating geometric shapes, smooth fluid animation, dark background with glowing elements, tech aesthetic",
"generate_audio": true
}'
# Lifestyle/outcome shot
belt app run google/veo-3-1-fast --input '{
"prompt": "Happy person relaxing on couch with laptop, smiling at screen, bright airy living room, warm afternoon light, satisfied customer feeling, lifestyle commercial style"
}'
# Before/after comparison
belt app run falai/flux-dev-lora --input '{
"prompt": "Split screen comparison, left side cluttered messy desk with papers and stress, right side clean organized minimalist workspace, dramatic difference, clean design"
}'Image-to-Video for Scenes
# Generate a still frame first
belt app run falai/flux-dev-lora --input '{
"prompt": "Professional workspace with glowing holographic interface, futuristic but clean, blue accent lighting"
}'
# Animate it
belt app run falai/wan-2-5-i2v --input '{
"prompt": "Gentle camera push in, holographic elements subtly floating and rotating, soft ambient light shifts",
"image": "path/to/workspace-still.png"
}'Voiceover Production
Script Writing Tips
- Short sentences. Max 15 words per sentence.
- Active voice. "You can track your data" not "Your data can be tracked."
- Conversational tone. Read it aloud — if it sounds stiff, rewrite.
- One idea per sentence. One sentence per visual beat.
Generating Voiceover
# Professional narration with Dia TTS
belt app run falai/dia-tts --input '{
"prompt": "[S1] Tired of spending hours on reports that nobody reads? There is a better way. Meet DataFlow. It turns your raw data into visual stories... in seconds. Just connect your source, pick a template, and share. Try DataFlow free today."
}'Pacing Control in TTS
Technique
Effect
Example
Period .
Medium pause
"This changes everything. Here's how."
Ellipsis ...
Long pause (dramatic)
"And the result... was incredible."
Comma ,
Short pause
"Fast, simple, powerful."
Exclamation !
Emphasis/energy
"Start building today!"
Question ?
Rising intonation
"What if there was a better way?"
Music & Audio
Background Music Guidelines
- Volume: 20-30% under narration (duck 6-12dB when voice plays)
- Style: match the brand tone (corporate = ambient electronic, startup = upbeat indie)
- Structure: intro swell (first 3s) -> subtle loop under narration -> swell at CTA
- No vocals: instrumental only under narration
# Generate background music
belt app run <music-gen-app> --input '{
"prompt": "upbeat corporate background music, modern electronic, 90 BPM, positive and professional, no vocals, suitable for product explainer video"
}'Assembly Pipeline
Full Production Workflow
# 1. Generate voiceover
belt app run falai/dia-tts --input '{
"prompt": "[S1] Your script here..."
}'
# 2. Generate scene visuals (in parallel)
belt app run google/veo-3-1-fast --input '{"prompt": "scene 1 description"}' --no-wait
belt app run google/veo-3-1-fast --input '{"prompt": "scene 2 description"}' --no-wait
belt app run google/veo-3-1-fast --input '{"prompt": "scene 3 description"}' --no-wait
# 3. Merge scenes into sequence
belt app run infsh/media-merger --input '{
"media": ["scene1.mp4", "scene2.mp4", "scene3.mp4"]
}'
# 4. Add voiceover to video
belt app run infsh/video-audio-merger --input '{
"video": "merged-scenes.mp4",
"audio": "voiceover.mp3"
}'
# 5. Add captions
belt app run infsh/caption-videos --input '{
"video": "final-with-audio.mp4",
"caption_file": "captions.srt"
}'Video Length by Format
Format
Length
Platform
Social teaser
15-30s
TikTok, Instagram Reels, YouTube Shorts
Product demo
60-90s
Website, landing page
Feature explainer
90-120s
YouTube, email
Tutorial/walkthrough
2-5min
YouTube, help center
Investor pitch video
2-3min
Pitch deck supplement
Transition Types
Transition
When to Use
Effect
Cut
Default between related scenes
Clean, professional
Dissolve/Crossfade
Time passing, mood shift
Soft, contemplative
Wipe
New topic or section
Clear separation
Zoom/Push
Drilling into detail
Focus attention
Match cut
Visual similarity between scenes
Clever, memorable
Common Mistakes
Mistake
Problem
Fix
Script too wordy
Voiceover rushed, viewer overwhelmed
Cut to 150 wpm max
No hook in first 3s
Viewers leave immediately
Start with the problem or surprising stat
Visuals lag narration
Confusing disconnect
Visuals should match or slightly precede words
Background music too loud
Can't hear narration
Duck music 6-12dB under voice
No captions
85% of social video watched silent
Always add captions
Too many ideas
Viewer retains nothing
One core message per video
Related Skills
npx skills add inference-sh/skills@ai-video-generation
npx skills add inference-sh/skills@video-prompting-guide
npx skills add inference-sh/skills@text-to-speech
npx skills add inference-sh/skills@prompt-engineeringBrowse all apps: belt app store