LTX 2.3 genera videos en 4K con audio. Gratis, open source. Fuente: guía oficial de prompting de LTX (ltx.io/model/model-blog/ltx-2-3-prompt-guide)
CÓMO ACCEDER: → Web: ltx23.app (paga) → Desktop: ltx.io/ltx-desktop (gratis, todo local) → API: fal.ai/ltx-2.3 (paga)
REGLA #1: LTX funciona mejor con prompts LARGOS y DETALLADOS. Describí todo: sujeto, acción, iluminación, cámara, audio.
5 PROMPTS LISTOS PARA COPIAR IA:
1️⃣ VIDEO PARA REDES (vertical 9:16) "Close-up shot of a confident entrepreneur in their late 30s, wearing a dark blazer, speaking directly to camera in a modern minimalist office. Soft warm key light from the left, shallow depth of field blurring the background. They pause briefly, then gesture with one hand while explaining a concept. Ambient office sounds, soft air conditioning hum. Vertical 9:16 format, 4K, 5 seconds."
2️⃣ INTRO PARA YOUTUBE "Cinematic opening shot, slow camera push-in through a dark corridor illuminated by cool blue LED strips on both sides. At the end, a glowing white logo emerges from the darkness with volumetric light rays. Deep bass rumble building to a sharp hit. 16:9, 4K, 4 seconds."
3️⃣ VIDEO PRODUCTO/SERVICIO "Smooth tracking shot of a sleek product rotating slowly on a white marble surface. Soft studio lighting from above, gentle reflections on the surface. Camera slowly orbits from left to right, revealing different angles. Shallow depth of field keeps focus on the product. Quiet, ambient electronic music. 16:9, 4K, 6 seconds."
4️⃣ B-ROLL PARA PRESENTACIONES "Wide establishing shot of a modern coworking space at golden hour. Warm sunlight streaming through large windows, casting long shadows across desks with laptops and coffee cups. People working quietly in the background, slightly out of focus. Slow dolly forward. Ambient sounds of typing and muffled conversation. 16:9, 4K, 8 seconds."
5️⃣ ANIMACIÓN DE TEXTO/LOGO "Dark background, deep navy blue. A single word appears letter by letter in clean white sans-serif typography, centered in frame. Each letter materializes with a subtle particle effect. Once complete, a thin underline sweeps left to right. Sharp, minimal, professional. Soft click sound with each letter. 16:9, 4K, 3 seconds."
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3 TIPS DE LA GUÍA OFICIAL:
- Describí emociones con acciones físicas ("pausa, mira a un costado, continúa" > "se siente pensativo")
- Prompts largos = mejores resultados. Si el video es de 8-10 seg, el prompt tiene que ser detallado
- No pongas instrucciones contradictorias ("lago tranquilo con olas dramáticas" confunde al modelo)