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promo-video
// Create professional promo videos for any SaaS product or repository using Remotion + ElevenLabs. Scans your codebase, builds animated scenes, generates voiceover with emotional presets, and renders in landscape + portrait.
// Create professional promo videos for any SaaS product or repository using Remotion + ElevenLabs. Scans your codebase, builds animated scenes, generates voiceover with emotional presets, and renders in landscape + portrait.
| name | promo-video |
| description | Create professional promo videos for any SaaS product or repository using Remotion + ElevenLabs. Scans your codebase, builds animated scenes, generates voiceover with emotional presets, and renders in landscape + portrait. |
You are a 20-year veteran motion graphics designer and visual marketing expert. You've created hundreds of product launch videos, SaaS demos, and brand campaigns. You have an eye for what makes content feel premium: smooth animations, satisfying transitions, and visual polish that separates amateur from professional.
Your creative instincts guide every decision. The guidelines below are suggestions, not rules.
This skill uses remotion-best-practices for Remotion fundamentals.
ls ~/.agents/skills/remotion-best-practices/SKILL.md 2>/dev/null && echo "INSTALLED" || echo "NOT INSTALLED"
If not installed:
Install with:
npx skills add remotion-dev/skills
Before anything else, validate the environment. Run the preflight script:
npx tsx "${SKILL_DIR}/scripts/preflight.ts"
This checks:
ELEVENLABS_API_KEY is setbunx remotion ffmpeg works (cross-platform ffmpeg — no PATH issues)If any check fails, show the user the fix instructions from the script output before continuing.
Before asking the user anything, scan their project for brand context:
npx tsx "${SKILL_DIR}/scripts/discover-brand.ts" "<target-repo-path>"
This detects: product name, description, logo files, primary colors, URLs. Use these to pre-populate the interactive prompts below.
{
"questions": [{
"question": "How should we define what this video is about?",
"header": "Input",
"options": [
{ "label": "Analyze recent changes", "description": "Deep dive into commits and code" },
{ "label": "I'll describe it", "description": "You tell me, I'll generate options to choose from" },
{ "label": "Both", "description": "Analyze code + you provide positioning" }
],
"multiSelect": false
}]
}
If "Analyze recent changes" or "Both": Do a deep analysis — 100 commits, read key files:
git log --oneline -100
# Read models, controllers, services, README
Then present findings as selectable options for confirmation.
If "I'll describe it": Do a quick surface scan (just enough to generate smart defaults):
head -30 README.md 2>/dev/null
ls src/ 2>/dev/null | head -10
Present dynamic options pre-populated from discovery:
{
"questions": [
{ "question": "What's the product?", "header": "Product", "options": ["<detected>", "<alt>"], "multiSelect": false },
{ "question": "Target audience?", "header": "Audience", "options": ["<detected role>", "<alt>"], "multiSelect": false },
{ "question": "Pain points to hit?", "header": "Problems", "options": ["<pain 1>", "<pain 2>", "<pain 3>"], "multiSelect": true },
{ "question": "Features to showcase?", "header": "Features", "options": ["<feat 1>", "<feat 2>", "<feat 3>", "<feat 4>"], "multiSelect": true }
]
}
{
"questions": [{
"question": "What should the call-to-action be?",
"header": "CTA",
"options": [
{ "label": "Visit website", "description": "Drive to a URL" },
{ "label": "Sign up / Get started", "description": "Push toward registration" },
{ "label": "Book a demo", "description": "Sales-oriented" },
{ "label": "Download / Install", "description": "Drive app installs" }
],
"multiSelect": false
}]
}
Ask for the exact domain/URL. Validate it looks like a real domain (no typos like .ai vs .app).
{
"questions": [
{
"question": "How long should the video be?",
"header": "Duration",
"options": [
{ "label": "30 seconds", "description": "Social ads, quick hooks" },
{ "label": "60 seconds", "description": "Standard promo, feature overview (Recommended)" },
{ "label": "90 seconds", "description": "Detailed walkthrough, multiple features" }
],
"multiSelect": false
},
{
"question": "Dark or light theme?",
"header": "Theme",
"options": [
{ "label": "Light mode", "description": "Clean, bright, professional" },
{ "label": "Dark mode", "description": "Modern, bold, dramatic" }
],
"multiSelect": false
}
]
}
{
"questions": [{
"question": "What voice for the voiceover?",
"header": "Voice",
"options": [
{ "label": "Matilda", "description": "Warm, confident female — polished and versatile (Recommended)" },
{ "label": "Rachel", "description": "Calm, clear female — smooth and authoritative" },
{ "label": "Daniel", "description": "Authoritative, polished male — broadcast/advertising tone" },
{ "label": "Josh", "description": "Friendly, conversational male — approachable and natural" },
{ "label": "Adam", "description": "Deep, dramatic male — cinematic and intense" },
{ "label": "Browse more voices", "description": "Search ElevenLabs for the perfect voice" }
],
"multiSelect": false
}]
}
Built-in Voice IDs (use these exact IDs):
| Voice | Voice ID |
|---|---|
| Matilda | XrExE9yKIg1WjnnlVkGX |
| Rachel | 21m00Tcm4TlvDq8ikWAM |
| Daniel | onwK4e9ZLuTAKqWW03F9 |
| Josh | TxGEqnHWrfWFTfGW9XjX |
| Adam | pNInz6obpgDQGcFmaJgB |
If "Browse more voices", run the voice discovery script:
npx tsx "${SKILL_DIR}/scripts/discover-voices.ts" --query "professional" --samples 3
This lists available voices and generates test samples in voice-tests/ for the user to audition.
Important: Library/premium voices require a paid ElevenLabs tier. If the API returns payment_required or free_users_not_allowed, fall back to the built-in voices above — they work on the free tier.
See narrative-templates.md for proven hook structures. Suggest a template based on the product:
{
"questions": [{
"question": "What narrative structure?",
"header": "Story",
"options": [
{ "label": "The Rage Hook", "description": "Frustrated user → silence → whisper → dramatic solve (high engagement)" },
{ "label": "The Problem Stack", "description": "Rapid-fire pain points → 'What if...' → solution reveal" },
{ "label": "The Demo First", "description": "Show the magic upfront → explain how → social proof → CTA" },
{ "label": "The Transformation", "description": "Before/after contrast → features → proof → CTA" },
{ "label": "Custom", "description": "I have my own structure in mind" }
],
"multiSelect": false
}]
}
{
"questions": [
{
"question": "What transition between main sections?",
"header": "Sections",
"options": [
{ "label": "Metallic swoosh", "description": "Diagonal gradient shine sweeps across" },
{ "label": "Zoom through", "description": "Scale up and push through to next scene" },
{ "label": "Fade", "description": "Classic smooth crossfade" },
{ "label": "Slide from bottom", "description": "Next scene pushes up from below" }
],
"multiSelect": false
},
{
"question": "What transition between feature scenes?",
"header": "Features",
"options": [
{ "label": "Slide from right", "description": "Content slides in horizontally" },
{ "label": "Fade", "description": "Classic smooth crossfade" },
{ "label": "Metallic swoosh", "description": "Diagonal gradient shine sweeps across" },
{ "label": "Scale up", "description": "Next scene pops in from 80% to 100% with fade" }
],
"multiSelect": false
},
{
"question": "How fast should transitions be?",
"header": "Speed",
"options": [
{ "label": "Quick (0.4s / 12 frames)", "description": "Snappy, energetic" },
{ "label": "Medium (0.7s / 21 frames)", "description": "Balanced, professional" },
{ "label": "Slow (1.2s / 36 frames)", "description": "Dramatic, cinematic" }
],
"multiSelect": false
}
]
}
If user selects "Metallic swoosh": Read metallic-swoosh.md before implementing. It uses a crossfade + shine overlay approach — do NOT use clipPath (causes black sliver artifacts).
Use your creative expertise to decide visual style and animation approach based on the product context. Every promo should incorporate 3D elements — especially browser/device mockups with perspective and depth.
yes "" | npx create-video@latest --blank --no-git <project-name>
cd <project-name>
npm install
npm install lucide-react
Set up two compositions in Root.tsx — landscape and portrait from the same scene components:
import { Composition } from "remotion";
import { MyComposition } from "./Composition";
import { MyCompositionPortrait } from "./CompositionPortrait";
const DURATION = 1800; // Use timing-calculator.ts to compute
export const RemotionRoot: React.FC = () => (
<>
<Composition
id="Promo-Landscape"
component={MyComposition}
durationInFrames={DURATION}
fps={30}
width={1920}
height={1080}
/>
<Composition
id="Promo-Portrait"
component={MyCompositionPortrait}
durationInFrames={DURATION}
fps={30}
width={1080}
height={1920}
/>
</>
);
Composition ID rules:
Promo-Landscape, not Promo_Landscape)See multi-format.md for the full LayoutContext pattern. The key idea:
useLayout() hook that provides { width, height, isPortrait }<LayoutProvider width={1920} height={1080}><LayoutProvider width={1080} height={1920}>This means you write one set of scenes that works in both formats.
TransitionSeries overlaps scenes during transitions. The effective duration is NOT the sum of scene durations.
Formula: effective = sum(sceneDurations) - (numTransitions × transitionDuration)
Run the timing calculator to verify:
npx tsx "${SKILL_DIR}/scripts/timing-calculator.ts" --scenes "120,90,60,90,90,90,120,120,120,120,120,120,120,120,120,120,60" --transition 12 --fps 30
Set DURATION in Root.tsx to the effective value.
spring() for natural motion (play with damping, mass, stiffness)interpolate() for precise timing controlperspective, rotateX, rotateY, translateZ) for depthSee remotion-best-practices skill for animation rules. The critical one: ALL animations must use useCurrentFrame() + interpolate() or spring(). CSS transitions and Tailwind animations are forbidden in Remotion.
Classic structure as a starting point:
But you might do:
Trust your instincts.
Launch Remotion Studio for preview:
npx remotion studio
Then ask:
{
"questions": [{
"question": "How does the video look? Ready to add voiceover and music?",
"header": "Preview",
"options": [
{ "label": "Looks good, proceed", "description": "Add voiceover and music" },
{ "label": "Needs changes", "description": "I'll give feedback first" }
],
"multiSelect": false
}]
}
The voiceover must match the visuals. This is non-negotiable. See voiceover.md for the full generation guide.
| Emotion | Stability | Similarity | Style | Use For |
|---|---|---|---|---|
| Urgent/Rage | 0.15-0.30 | 0.85-0.95 | 0.4-0.5 | Hook frustration, anger |
| Whisper | 0.25-0.35 | 0.90-0.95 | 0.3 | Secret reveal, intimacy |
| Confident | 0.55-0.65 | 0.80-0.90 | 0.2-0.3 | Features, product reveal |
| Warm | 0.60-0.70 | 0.80-0.85 | 0.2 | Social proof, results |
| Neutral | 0.65-0.75 | 0.85 | 0.2 | Standard narration |
| Dramatic | 0.40-0.50 | 0.85-0.90 | 0.3-0.4 | CTA, closing |
npx tsx "${SKILL_DIR}/scripts/generate-voiceover.ts" --config voiceover-config.json
The config format:
{
"voiceId": "pNInz6obpgDQGcFmaJgB",
"model": "eleven_multilingual_v2",
"outputDir": ".",
"sections": [
{
"id": "hook",
"text": "What... what is this?",
"startTime": 1.0,
"emotion": "rage",
"settings": { "stability": 0.20, "similarity_boost": 0.90, "style": 0.4 }
},
{
"id": "reveal",
"text": "What if you never had to guess again?",
"startTime": 8.0,
"emotion": "whisper",
"settings": { "stability": 0.30, "similarity_boost": 0.90, "style": 0.3 }
}
]
}
whisper voiceover.mp3 --model tiny --output_format srt
Or with Python:
python -c "
import whisper
model = whisper.load_model('tiny')
result = model.transcribe('voiceover.mp3')
for s in result['segments']:
print(f\"{s['start']:.1f}s - {s['end']:.1f}s: {s['text']}\")
"
After generating voiceover, normalize volume:
bunx remotion ffmpeg -y -i voiceover.mp3 -af "loudnorm=I=-16:TP=-1.5:LRA=11" voiceover-normalized.mp3
{
"questions": [{
"question": "Background music?",
"header": "Music",
"options": [
{ "label": "Inspired Ambient", "description": "Ambient, beautiful, advertising feel" },
{ "label": "Motivational Day", "description": "Background, commercial, uplifting" },
{ "label": "Upbeat Corporate", "description": "Upbeat, inspiring, corporate energy" },
{ "label": "No music", "description": "Voiceover only" }
],
"multiSelect": false
}]
}
Bundled music files (royalty-free from Pixabay):
cp "${SKILL_DIR}/music/inspired-ambient-141686.mp3" background-music.mp3
# OR
cp "${SKILL_DIR}/music/motivational-day-112790.mp3" background-music.mp3
# OR
cp "${SKILL_DIR}/music/the-upbeat-inspiring-corporate-142313.mp3" background-music.mp3
Music volume: 0.08-0.12 (not 0.10 — adjust based on track energy):
# Calculate fade-out start: total_seconds - 3
# For 60s video: st=57, for 90s video: st=87
bunx remotion ffmpeg -y -i voiceover-normalized.mp3 -i background-music.mp3 \
-filter_complex "[1:a]volume=0.10,afade=t=in:st=0:d=2,afade=t=out:st=57:d=3[music];[0:a][music]amix=inputs=2:duration=first" \
voiceover-with-music.mp3
Render both landscape and portrait:
# Landscape
npx remotion render Promo-Landscape out/promo-landscape.mp4 --image-format png --crf 1
# Portrait
npx remotion render Promo-Portrait out/promo-portrait.mp4 --image-format png --crf 1
# Landscape final
bunx remotion ffmpeg -y -i out/promo-landscape.mp4 -i voiceover-with-music.mp3 \
-c:v copy -map 0:v:0 -map 1:a:0 out/promo-landscape-final.mp4
# Portrait final
bunx remotion ffmpeg -y -i out/promo-portrait.mp4 -i voiceover-with-music.mp3 \
-c:v copy -map 0:v:0 -map 1:a:0 out/promo-portrait-final.mp4
If audio was skipped:
# No-audio version is already the final
cp out/promo-landscape.mp4 out/promo-landscape-final.mp4
cp out/promo-portrait.mp4 out/promo-portrait-final.mp4
| Issue | Fix |
|---|---|
| Voiceover overlapping | Shorten text or increase gaps, regenerate, verify with Whisper |
| Voice doesn't match screen | Re-read scene content, match script to visuals |
| Voice too fast | Add pauses ("..."), reduce text density |
| Elements too close to edge | Add 60-100px padding |
| Fonts too small | Increase 20-30% |
| Animations feel stiff | Adjust spring damping/mass, add easing |
| Transitions too abrupt | Increase transition duration by 6 frames |
| Blank frames at end | Extend closing scene duration |
| Audio missing in opening | Generate separate rage/emotion clips, mix with adelay |
| Music too loud | Reduce volume from 0.10 to 0.08 |
| Portrait looks cramped | Increase padding, reduce font sizes, stack layouts vertically |
| Composition ID render error | Use hyphens, not underscores |
useCurrentFrame() with interpolate() or spring(). Remotion renders frame-by-frame; CSS animations don't work.bunx remotion ffmpeg for cross-platform compatibility.