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Sound and Vision, All in One Take

Seedance 1.5 Pro

ByteDance's next-generation audio-visual generation model with film-grade cinematography, native audio generation, and powerful storytelling. Generate cinema-quality videos with synchronized sound in a single pass.

What's New in Seedance 1.5 Pro

Three major breakthroughs in audio-visual synergy, visual impact, and narrative coherence.

Native Audio Generation

Generate diverse voices and spatial sound effects that coordinate with visuals for smoother storytelling. Support a wide range of languages and dialects with great lip-sync and motion alignment.

Film-Grade Cinematography

Capable of complex camera movement, from close-ups with subtle facial expressions and emotions, to full-shots with cinematic level of details, composition, and atmosphere.

Strong Storytelling

Based on prompt intent, can auto-fill the narratives and keep the content cohesive across various characters' emotions, expressions and actions, suitable for short dramas, advertising, and social media.

Multi-Language Support

Native support for multiple languages including Chinese, English, Japanese, Korean, Spanish, and Indonesian. Also supports regional dialects like Sichuanese and Cantonese with accurate vocal prosody.

Model Overview

Seedance 1.5 Pro is ByteDance's next-generation audio-visual generation model, developed by the ByteDance Seed Team. This model features joint audio-visual generation capabilities, capable of executing a range of tasks including synthesizing audio-video content from text prompts and generating it through image-driven processes. This evolves Seedance models beyond the purely visual, allowing them to seamlessly integrate sound into video generation.

While Seedance 1.0 focused on improving the "performance floor" by enhancing motion generation stability, Seedance 1.5 Pro now aims higher. Beyond its new audio-synchronized generation capability, it also strives to elevate the "performance ceiling" of visual impact and motion effects. By adopting more audacious technical approaches, Seedance 1.5 Pro has achieved breakthroughs in audio-visual synergy, visual impact, and narrative coherence.

The model uses a dual-branch diffusion transformer architecture that renders video and audio in the same latent space, producing tight lip-sync and natural foley without the disconnect between "visuals and separate audio." This ensures high audio-visual consistency during generation, significantly improving the alignment accuracy of lip movements, intonation, and performance rhythm.

Key Features

Comprehensive capabilities for professional-grade audio-visual content creation.

Precise Audio-Visual Synchronization

High audio-visual consistency with significantly improved alignment accuracy of lip movements, intonation, and performance rhythm. Dual-branch diffusion transformer renders in the same latent space.

Tight lip-sync and natural foley effects

Cinematic Camera Control

Autonomous cinematography capabilities enabling complex movements such as continuous long takes and dolly zooms (Hitchcock zoom). Achieves cinematic scene transitions and professional color grading.

From close-ups to full-shots with film-grade quality

Enhanced Semantic Understanding

Precise analysis of narrative contexts through strengthened semantic understanding. Deciphers nuanced and complex human emotions and translates them into expressive artistic representations.

Significantly improves overall narrative coordination

Multi-Language & Dialect Support

Native support for Chinese, English, Japanese, Korean, Spanish, and Indonesian. Also supports regional Chinese dialects like Sichuanese and Cantonese with accurate vocal prosody and emotional tension.

Facial expressions align with dialect-specific prosody

Dynamic Tension & Motion

Smoothly renders high-dynamic, high-impact motion scenes. Substantially enhances the dynamic tension of videos with fast lateral cuts, slow-motion close-ups, and authentic recreation of speed and power.

Perfect for extreme sports and action sequences

Style Consistency

Demonstrates robust style consistency in image-to-video tasks. Effectively maintains stable character features during multi-shot transitions and complex movements, improving coherence from raw footage to final production.

Seed-based reproducibility for consistent results

Technical Specifications

Comprehensive technical details of Seedance 1.5 Pro's capabilities and parameters.

Video Output

Resolution 480p, 720p
Duration 5s, 10s
Frame Rate 24 fps
Aspect Ratio Adaptive

Audio Output

Languages 6 Languages
Dialects Multiple
Lip-Sync Precise
Audio Types 5 Types

Generation Modes

Text-to-Video
Image-to-Video
Architecture Dual-Branch
Synchronization Simultaneous

Supported Languages & Audio Types

Category Supported Options Features
Languages Chinese, English, Japanese, Korean, Spanish, Indonesian Natural vocal prosody
Dialects Sichuanese, Cantonese, and more Accurate prosody & emotion
Voice/Dialogue Character narration, multi-person conversations Precise lip-sync
Ambient Sounds Wind, ocean waves, street noise, traffic Spatial awareness
Sound Effects Footsteps, glass breaking, 8-bit game sounds Synchronized with visuals

Use Cases

Seedance 1.5 Pro empowers creators across diverse scenarios with native audio-visual generation.

Film & TV Production

Create cinema-quality scenes with film-grade cinematography, continuous narrative sequences, and emotional character portrayals. Professional color grading and composition for broadcast-ready content.

Short Drama Generation

Multi-language and dialect support for comedy and stylized performances. Coherent narrative logic with multi-shot transitions. Perfect for entertainment content and social media storytelling.

Advertising Content

Product promotion videos with commercial-style cinematography. Professional color grading and brand marketing content. Ideal for e-commerce, live-streaming, and product demonstrations.

Opera Performance

AI exploration of traditional art forms with accurate vocal prosody and emotional tension. Synchronized action and music for cultural heritage content. Captures unique characteristics of traditional performance.

Game Content

Pixel art and 3D game CG with immersive audio-visual interaction. Precise sound effect generation synchronized with gameplay. 8-bit sounds, footsteps, and ambient audio for enhanced gaming experience.

Anime Creation

Anime-style scenes with multi-shot narrative sequences. Romantic and coherent narrative atmosphere with Japanese dialogue and emotional expression. Perfect for anime content creators and storytellers.

Model Limitations

Understanding the current limitations helps you get the best results from Seedance 1.5 Pro.

Resolution Constraints

Currently supports up to 720p resolution. 1080p is not yet supported on most platforms. For higher resolution needs, consider upscaling post-processing or wait for future model updates.

Duration Limits

Single generation supports 5 and 10 second durations (some platforms support 4-12 seconds). Longer videos require generating multiple segments and stitching them together in post-production.

Language Coverage

Primarily supports 6 languages (Chinese, English, Japanese, Korean, Spanish, Indonesian). Other languages may have limited effectiveness or require translation. Best results achieved with supported languages.

Style Range

Certain specific artistic styles may require multiple iterations to achieve ideal results. Detailed prompts with clear style descriptions help improve first-generation quality and reduce iteration needs.

Frequently Asked Questions

Common questions about Seedance 1.5 Pro and how to get started.

What is "joint audio-visual generation"?

Joint audio-visual generation means generating audio and video simultaneously during the generation process, rather than sequentially. Seedance 1.5 Pro uses a dual-branch diffusion transformer architecture that renders video and audio in the same latent space, achieving perfect audio-visual synchronization and tight lip-sync.

What languages does Seedance 1.5 Pro support?

The model supports Chinese, English, Japanese, Korean, Spanish, and Indonesian. For Chinese, it also supports multiple regional dialects including Sichuanese and Cantonese, accurately capturing unique vocal prosody and emotional tension.

What are the video duration and resolution limits?

Seedance 1.5 Pro supports generating 5 and 10 second videos (some platforms support 4-12 seconds). Resolution supports 480p and 720p, with 1080p not currently supported. Frame rate is 24 fps with adaptive aspect ratios.

What is "film-grade cinematography"?

Film-grade cinematography refers to the model's autonomous cinematography capabilities, enabling complex camera movements such as continuous long takes, dolly zooms (Hitchcock zoom), fast lateral cuts, and slow-motion close-ups. The model also achieves cinematic scene transitions and professional color grading, substantially enhancing video dynamic tension.

How is audio-visual synchronization ensured?

Seedance 1.5 Pro uses a dual-branch diffusion transformer architecture that simultaneously renders video and audio in the same latent space, rather than generating them sequentially. This ensures high audio-visual consistency, significantly improving the alignment accuracy of lip movements, intonation, and performance rhythm.

How does Image-to-Video work?

Upload a start frame image (optionally an end frame), add a text prompt describing the desired actions and audio, and the model generates the motion, camera movement, dialogue, and sound design in between. The model has robust style consistency, maintaining stable character features during multi-shot transitions and complex movements.

Ready to Create with Seedance 1.5 Pro?

Experience ByteDance's next-generation audio-visual generation model. Sound and vision, all in one take. Create cinema-quality videos with synchronized sound.

Start Creating with Seedance 1.5 Pro

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