Seedance 1.5 Pro
Generate professional videos with synchronized audio using ByteDance's Seedance 1.5 Pro. This joint audio-video AI model creates 4K videos up to 12 seconds with natural lip sync, cinematic camera control, and multilingual support. Transform text or images into polished video content.
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Generation Results
See what Seedance 1.5 Pro can create
Seedance 1.5 Pro Tips
Get the best results with ByteDance's Seedance 1.5 Pro
Joint Audio-Video
Seedance 1.5 Pro generates video and audio simultaneously for perfect sync.
Cinematic Control
Enable or disable fixed lens for static or dynamic camera movement.
Audio Generation
Generate synchronized sound effects and dialogue with your video.
Flexible Duration
Choose 4s, 8s, or 12s clips to match your content needs.
Prompt Examples
Click to use these prompts with Seedance 1.5 Pro
Multilingual DialogueDialogue
Chinese-English conversation with natural lip sync
In a Chinese-English communication scenario, a 70-year-old old man said kindly to the child: Good boy, study hard where you are in China! The child happily replied in Chinese: Grandpa, I'll come to accompany you when I finish my studies in China. Then the old man stroked the child's head
Character AnimationAnimation
Animated character with regional dialect audio
The camera slowly zooms in on the small lychee at the very top, which sways its body and says the promotional slogan in cute Sichuan dialect
Music PerformancePerformance
Dynamic music scene with synchronized audio
A girl is at a music venue playing the drums
Seedance 1.5 Pro Examples
Sample videos generated with Seedance 1.5 Pro. See the quality of text-to-video and image-to-video output across different styles and use cases.
Professional cinematic racing scene with dynamic camera movement
High quality video with professional production value in rain
Character animation with expressive movements
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Why Seedance 1.5 Pro Stands Out
Seedance 1.5 Pro uses a Dual-Branch Diffusion Transformer (DB-DiT) with 4.5 billion parameters. Unlike models that generate video first and add audio later, Seedance 1.5 Pro creates both simultaneously - locking phonemes to lip shapes and sound effects to visual events at the frame level.
Joint Audio-Video Generation
Seedance 1.5 Pro treats sound and vision as one unified output. The dual-branch architecture creates both audio and video simultaneously, resulting in tighter synchronization than cascaded approaches. Lip movements match speech phonemes at the frame level, and sound effects align precisely with visual events.
Cinematic Camera Control
Direct your videos with professional camera movements. Seedance 1.5 Pro understands film language - Pan, Tilt, Zoom, and Orbit. Create high-speed tracking shots, Hitchcock zooms, and dynamic perspective shifts. The fixed lens option keeps the camera stable when you need static shots.
Multilingual Lip Sync
Seedance 1.5 Pro supports English, Mandarin Chinese, Japanese, Korean, Spanish, Portuguese, Indonesian, and Chinese dialects including Cantonese and Sichuanese. Each language maintains phoneme-level lip sync accuracy - the mouth movements match the spoken sounds precisely.
How to Use Seedance 1.5 Pro
Generate professional videos with Seedance 1.5 Pro using text prompts or reference images. The process handles audio generation automatically - no separate audio editing required.
1. Write Your Prompt or Upload Image
Start with a text description of your video scene, or upload 1-2 reference images for image-to-video mode. Seedance 1.5 Pro accepts both approaches. Describe the action, setting, and any dialogue or sounds you want.
2. Configure Video Settings
Select your video duration (4s, 8s, or 12s), aspect ratio (1:1, 16:9, 9:16, 4:3, 3:4, or 21:9), and resolution (480p or 720p). Enable fixed lens for stable camera or leave it off for dynamic movement. Turn on audio generation if you want synchronized sound.
3. Generate with Seedance 1.5 Pro
Submit your request. Seedance 1.5 Pro processes the video and audio together using its DB-DiT architecture. Generation time depends on duration and resolution. The system handles lip sync, sound effects, and visual composition in a single pass.
4. Download Your Video
Once complete, preview your video with audio directly in the browser. Download the MP4 file for use in your projects. The video includes all audio generated by Seedance 1.5 Pro - no post-processing needed for basic audio sync.
Seedance 1.5 Pro Features
Seedance 1.5 Pro brings professional video generation capabilities with joint audio-video synthesis, cinematic controls, and multilingual support.
Text-to-Video Generation
Describe your scene and Seedance 1.5 Pro creates the video. The 4.5 billion parameter model handles complex prompts - characters, environments, actions, and dialogue. Results include synchronized audio when the audio generation option is enabled.
Image-to-Video Animation
Upload 1-2 reference images and Seedance 1.5 Pro animates them with natural motion. The model preserves subject identity while adding movement, camera work, and optional audio. Useful for product shots, character animation, and scene extensions.
Variable Duration Output
Choose between 4-second, 8-second, or 12-second video clips with Seedance 1.5 Pro. Shorter durations work well for social media clips and quick transitions. Longer durations suit narrative content and product demonstrations.
Flexible Aspect Ratios
Seedance 1.5 Pro supports six aspect ratios: square 1:1, landscape 16:9, portrait 9:16, standard 4:3, portrait 3:4, and cinematic 21:9. Match your output to the platform - vertical for TikTok and Reels, wide for YouTube and presentations.
Synchronized Audio Generation
Enable audio generation and Seedance 1.5 Pro creates matching sound. Speech syncs to lip movements at the phoneme level. Ambient sounds and effects align with visual events. The joint generation approach produces tighter sync than adding audio afterward.
Fixed Lens Camera Option
Enable fixed lens for stable, static camera shots with Seedance 1.5 Pro. The camera stays locked while subjects move within the frame. Disable it for dynamic camera movement - pans, tilts, and tracking shots that follow the action.
Users on Seedance 1.5 Pro
Content creators and professionals share their experience using Seedance 1.5 Pro for video generation projects.
Marcus Chen
Video Producer
“The lip sync accuracy with Seedance 1.5 Pro surprised me. I generated a 12-second clip with dialogue and the mouth movements matched the audio naturally. The joint generation approach clearly makes a difference compared to adding audio separately.”
Elena Rodriguez
Social Media Manager
“Seedance 1.5 Pro handles multiple aspect ratios well. I create content for different platforms - 9:16 for TikTok, 16:9 for YouTube. Being able to generate the same concept in different formats saves significant time in my workflow.”
David Park
E-commerce Manager
“The image-to-video feature in Seedance 1.5 Pro works better than I expected. Uploaded product photos and got smooth animation with camera movement. The 8-second duration is enough for most of my e-commerce video needs.”
Sarah Mitchell
Content Director
“Fixed lens option in Seedance 1.5 Pro is exactly what I needed. Some shots require a stable camera while subjects move. Other AI video tools always add camera motion. Having the choice matters for professional-looking output.”
Kenji Yamamoto
Localization Lead
“Tested Seedance 1.5 Pro with Japanese dialogue and the lip sync held up. The multilingual support is real - not just English. For our international content, this saves the cost of separate localization passes.”
Seedance 1.5 Pro FAQ
Answers to frequently asked questions about using Seedance 1.5 Pro for AI video generation.
What is Seedance 1.5 Pro?
Seedance 1.5 Pro is ByteDance's joint audio-video generation model. Built on a Dual-Branch Diffusion Transformer (DB-DiT) architecture with 4.5 billion parameters, it generates video and audio simultaneously. This unified approach creates tighter synchronization between lip movements and speech than models that add audio as a separate step.
What video durations does Seedance 1.5 Pro support?
Seedance 1.5 Pro generates videos in three duration options: 4 seconds, 8 seconds, and 12 seconds. Shorter clips work for social media and quick content. Longer 12-second clips suit narrative content, product demos, and scenes that need more development time.
What aspect ratios are available in Seedance 1.5 Pro?
Seedance 1.5 Pro supports six aspect ratios: 1:1 (square), 16:9 (landscape/YouTube), 9:16 (portrait/TikTok/Reels), 4:3 (standard), 3:4 (portrait), and 21:9 (cinematic widescreen). Choose based on your target platform and content type.
How does the audio generation work in Seedance 1.5 Pro?
When audio generation is enabled, Seedance 1.5 Pro creates synchronized sound alongside the video in a single pass. The DB-DiT architecture locks phonemes to lip shapes and sound effects to visual events at the frame level. This differs from cascaded approaches that generate video first and add audio later.
What languages does Seedance 1.5 Pro support for lip sync?
Seedance 1.5 Pro provides phoneme-level lip sync for English, Mandarin Chinese, Japanese, Korean, Spanish, Portuguese, Indonesian, and Chinese dialects including Cantonese, Sichuanese, Shanghainese, and Taiwanese. Lip movements match speech sounds accurately across these languages.
What is the fixed lens option in Seedance 1.5 Pro?
The fixed lens option keeps the camera stationary during video generation. When enabled, the camera view stays stable while subjects move within the frame. When disabled, Seedance 1.5 Pro may add dynamic camera movements like pans, tilts, or tracking shots based on the scene content.
Can I use images with Seedance 1.5 Pro?
Yes, Seedance 1.5 Pro supports image-to-video generation. Upload 1-2 reference images and the model animates them with natural motion and optional audio. The system preserves subject identity while adding movement and camera work. Useful for product shots, portraits, and extending static scenes.
What resolution does Seedance 1.5 Pro output?
Seedance 1.5 Pro offers 480p (standard) and 720p (high) resolution options. The 720p setting provides sharper detail for larger displays and professional use. 480p works for faster generation and platforms where lower resolution is acceptable.