Happy Horse for Long-Form
Plan multi-scene long-form videos with up to 9 reference images, build detailed production briefs, and test multilingual lip-sync quality across 10 languages.
Long-Form Lab
Plan long-form Happy Horse videos from 30 seconds to 5 minutes. Configure reference images, break into scenes, and generate a complete production brief with timing and complexity analysis.
Duration Planner
Multi-Reference Image Configurator
Configure up to 9 reference images. Each image can serve a specific role in your production.
Scene Breakdown Builder
Visual Timeline
Lip-Sync Tester
Test multilingual lip-sync capabilities across 10 languages. Analyse phoneme complexity, quality predictions, and get tips for improving synchronisation quality.
Language Comparison Table
Best Practices for Multilingual Lip-Sync
Keep sentences short and natural. Lip-sync accuracy drops with complex or run-on sentences. Break dialogue into 10-15 word segments for optimal mouth movement matching.
Avoid words with unusual phoneme clusters. Words with consecutive consonant clusters (e.g. "strengths," "twelfths") create challenging mouth shapes. Simplify vocabulary when possible.
Include character reference with clear mouth visibility. Reference images showing the character with a visible, unobstructed mouth dramatically improve sync quality. Avoid masks, scarves, or heavy facial hair in references.
Match tone to mouth energy. Dramatic tones produce wider mouth movements that are easier to sync. Whispered or subtle dialogue is harder to match and may require post-production touch-up.
Test in the target language first. Generate a short 30-second test clip in your target language before committing to a full long-form production. This catches phoneme issues early and saves generation time and cost.
Key Insight
Happy Horse's ability to generate 2–5 minute videos with up to 9 reference images is a genuine paradigm shift. For the first time, AI video generation can produce content that approaches short-form narrative length — enough for a product demo, an explainer video, or a brand story. The multi-reference system means you can maintain character, environment, and style consistency across the entire piece.