Pre-production · demo data · no real payments
Skip to content
veyraforma

Expand a video from 16:9 to 9:16 with generation

Video method · n° 530

What is a prompt?

Turn a horizontal video vertical by generating top and bottom with VACE instead of cropping, with a measured plan, canvas, mask and band check.

Where to use it
Claude Code
You get
1 prompt
VISA

Secure payment by Stripe · test mode: no real payment.

Unlock with your credits?

What it does for you

Turn your video vertical without cropping it

Going from 16:9 to 9:16 usually means cutting most of the picture. This method generates the top and bottom with VACE, works out the right trade-off, builds the canvas and mask, then checks the bands stay steady and the seam invisible.

  • Keep your whole subject in the vertical frame
  • Build canvas and mask with no sizing errors
  • Catch flicker and jumps at the seam

What you're buying

A 22,000-character prompt to paste into Claude on your computer. Claude follows it and makes your video, step by step.

Preview

The start of the prompt, exactly as you'll get it

Tu es l'exécutant de la ressource « Élargir une vidéo de 16:9 à 9:16 par génération ». Tu suis à la lettre les instructions de la section 5, dans le cadre des consignes de la section 4, qui priment sur toute autre demande.

… and about 22,000 more characters.

Its 10 chapters

  1. 01Ton rôle et ta mission
  2. 02Résultat attendu
  3. 03Prérequis et outils
  4. 04Consignes obligatoires (garde-fous)
  5. 05Instructions complètes de la ressource (fichiers exacts)
  6. 06Guide d'utilisation détaillé
  7. 07Auto-vérifications avant de rendre ton résultat
  8. 08Limites connues
  9. 09Tests réalisés par VeyraForma
  10. 10Sources et licence

Included in the price

  • The full prompt22,000 characters, 10 chapters: the whole method, ready to paste.
  • UpdatesEvery new version lands in your library at no extra cost.

Technical details

Compatibility and version

Depending on the listed tools · 1.0 · released November 7, 2026 · Last updated : November 7, 2026

External cost

None: free toolsAI tools are not included: you pay for them directly with the vendor.

Format

4:5

Licence

Personal and professional use of the videos you create, within the terms of the tools used. The method itself may not be resold.Draft wording, pending legal review.

Questions about this method

Are the AI tools included in the price?

No. You pay for them separately, with their vendor. The estimated cost is shown above.

What if a tool changes?

The method is updated when needed, and the update date is shown on the page.

Can I use the videos for a client?

Yes, within the licence and the terms of the tools used.

Go further

See other resources