Seedance 1.5 Pro

Seedance 1.5 Pro: Text-to-Video with Audio Model

What is Seedance 1.5 Pro?

Seedance 1.5 Pro is an advanced generative AI model for text-to-video generation with synchronized audio. Unlike video-only models, it can jointly generate visuals and matching sound (dialogue/voice, ambient beds, and spatial sound effects) while following complex, multi-step instructions. The result is cohesive short-form or cinematic clips where motion, lip-sync, and audio timing align naturally.

Seedance 1.5 Pro is designed for creators and product teams building AI video generation, storytelling tools, ad creatives, and social-first content pipelines. It excels at film-grade composition—expressive performances, nuanced emotion, and camera language—making outputs feel directed rather than stitched together.

Key Features

• •Joint audio + video generation for coherent multimedia scenes (generate_audio)
• •Instruction-following for complex prompts, including narrative beats and emotional tone
• •Naturalistic sync: believable lip movement, motion-to-sound alignment, and scene continuity
• •Cinematic camera control with optional static framing (camera_fixed)
• •Shot consistency via seed for reproducible variations and A/B testing
• •Format controls for production delivery: duration, resolution, and aspect_ratio
• •Smooth transitions using optional first_frame_url and last_frame_url

Best Use Cases

• •Advertising & brand spots: product reveals with matched SFX and voiceover-style delivery
• •Short dramas & storytelling: character-driven scenes with emotion + dialogue timing
• •Social media content: vertical 9:16 clips, punchy 2–6s beats, trend-style edits
• •App prototypes: “describe a scene” demos for pitch decks and interactive experiences
• •Localized content: multi-language audio needs with consistent visuals

Prompt Tips and Output Quality

• •Write prompts like a shot list: setting → subject → action → camera → lighting → audio.
• •Specify audio explicitly when needed: “soft room tone, distant traffic, clear female voice.”
• •Use duration (2–12) to match pacing: 2–4s for loops/teasers, 8–12s for mini-scenes.
• •Pick aspect_ratio early (e.g., 9:16 for Shorts/Reels, 16:9 for YouTube).
• •Increase resolution to 1080p for faces, product detail, and text-like patterns.
• •For continuity, anchor with first_frame_url / last_frame_url, and lock a seed.

FAQs

Is Seedance 1.5 Pro a text-to-video model or an audio-video model?
It’s both: it generates video and synchronized audio in a single pass when generate_audio=true.

How is it different from typical AI video generators?
Seedance focuses on coherent storytelling with matched sound, including lip-sync and spatial SFX— not just silent visuals.

What parameters should I tweak first for best results?
Start with aspect_ratio, duration, and resolution. Use seed for repeatability and camera_fixed to reduce motion.

How do I create smoother transitions between scenes?
Provide first_frame_url to control the opening frame and last_frame_url to guide the closing frame.

Can I make vertical videos for TikTok/Reels?
Yes—set aspect_ratio to 9:16 and tune duration for short-form pacing.