480p · No sound
11
credits / second
= $0.011 USD / second
Official: $0.012−8%
- generate_audio
- false
- resolution
- 480p
ByteDance
Available via API
Seedance 1.5 Pro
Advanced video generation with synchronized audio - voice, sound effects, and background music
Video Generation
Model Guide
About Seedance 1.5 Pro
Advanced video generation with synchronized audio - voice, sound effects, and background music
Overview
Seedance 1.5 Pro is ByteDance's latest video generation model featuring native audio generation capabilities. Unlike previous versions, it can generate videos with synchronized audio including voice, sound effects, and background music - all in a single generation pass. This makes it ideal for creating complete, ready-to-publish video content.
Key Features
- Native Audio Generation: Generate synchronized voice, sound effects, and background music with your video
- First + Last Frame Control: Support for both first frame and last frame image inputs for precise video generation
- Flexible Duration: Generate videos from 4-12 seconds or use auto mode
- Multiple Aspect Ratios: Support for 16:9, 4:3, 1:1, 3:4, 9:16, 21:9, and adaptive
- Return Last Frame: Option to return the last frame for creating consecutive video sequences
- Fast Generation: Optimized for quick turnaround while maintaining quality
Seedance 1.5 Pro vs Seedance Pro Fast
| Feature | Seedance 1.5 Pro | Seedance Pro Fast |
|---|---|---|
| Audio Generation | Yes (voice, SFX, music) | No |
| Max Resolution | 720p | 1080p |
| First + Last Frame | Yes | First frame only |
| Duration Range | 4-12s | 5-10s |
| Return Last Frame | Yes | No |
Pricing
| Resolution | Audio | Credits/Second | Best For |
|---|---|---|---|
| 480p | No | 11 | Drafts, previews |
| 480p | Yes | 22 | Social media shorts |
| 720p | No | 25 | Standard content |
| 720p | Yes | 50 | Professional productions |
Duration Options
| Duration | 480p (No Audio) | 480p (With Audio) | 720p (No Audio) | 720p (With Audio) |
|---|---|---|---|---|
| 5 seconds | 55 credits | 110 credits | 125 credits | 250 credits |
| 8 seconds | 88 credits | 176 credits | 200 credits | 400 credits |
| 10 seconds | 110 credits | 220 credits | 250 credits | 500 credits |
| 12 seconds | 132 credits | 264 credits | 300 credits | 600 credits |
Use Cases
Social Media Content with Sound
Create engaging TikTok, Instagram Reels, or YouTube Shorts with built-in audio. No need for post-production audio editing.
Product Demonstrations
Generate product videos with ambient sound effects and background music for e-commerce listings.
Animated Storytelling
Transform static images into animated sequences with synchronized voice narration and sound effects.
Video Sequence Creation
Use the return_last_frame feature to create seamless consecutive video segments for longer narratives.
Technical Specifications
| Specification | Value |
|---|---|
| Max Resolution | 720p |
| Frame Rate | 24 fps |
| Duration Range | 4-12 seconds |
| Input Types | Text, Image (1-2 images) |
| Audio Generation | Voice, SFX, Background Music |
| Aspect Ratios | 16:9, 4:3, 1:1, 3:4, 9:16, 21:9, adaptive |
| Seed Range | -1 (random) or 0-4294967295 |
Input Modes
| Mode | Input | Description |
|---|---|---|
| Text-to-Video | Text prompt | Generate video from description |
| Image-to-Video (Single) | 1 image + text | First frame driven animation |
| Image-to-Video (Dual) | 2 images + text | First + last frame guided generation |
Best Practices
- Enable Audio Wisely: Enable audio generation when the content benefits from sound; disable for faster, cheaper generation when audio isn't needed
- Use Dual Images for Transitions: Provide both first and last frame images for smoother, more controlled transitions
- Describe Audio in Prompts: Include sound descriptions in your prompts for better audio synchronization
- Leverage Return Last Frame: Use this feature when creating multi-part video sequences to ensure continuity
- Choose Resolution Based on Platform: Use 480p for social media drafts, 720p for final productions
When to Choose Seedance 1.5 Pro
- You need video with synchronized audio in one generation
- Creating content for social media that requires sound
- Building multi-part video sequences with seamless transitions
- Need first + last frame control for precise animations
When to Use Seedance Pro Fast Instead
- You need 1080p resolution output
- Audio is not required or will be added separately
- Maximum visual quality is the priority over audio integration
Sources
Backend pricing
Rates published by the API.
Model identity, billing unit and every price tier below are read from the backend catalog.
480p · With sound
22
credits / second
= $0.022 USD / second
Official: $0.024−8%
- generate_audio
- true
- resolution
- 480p
720p · No sound
25
credits / second
= $0.025 USD / second
Official: $0.026−4%
- generate_audio
- false
- resolution
- 720p
720p · With sound
50
credits / second
= $0.05 USD / second
Official: $0.052−4%
- generate_audio
- true
- resolution
- 720p
1 credit = $0.001 USD. The final deduction returned by the API is authoritative.
generate_audio 默认开启；duration 为 auto 时按 8 秒计费