Produce audio-synced, cinema-style clips with Seedance 1.5 Pro—without stitching sound in post
Seedance 1.5 Pro is a native audio-visual video generation model developed by ByteDance Seed (Seed Vision Team), officially launched in December 2025 . It’s designed for joint audio-video generation—so speech, ambient sound, and visuals are created together to improve synchronization (including multilingual and dialect lip-sync) and support more film-like storytelling.
Technically, ByteDance Seed describes Seedance 1.5 Pro as a dual-branch Diffusion Transformer with a cross-modal joint module, paired with a multi-stage data pipeline and post-training optimizations (SFT + RLHF). The goal is practical, production-oriented output: tighter audio-visual alignment, stronger narrative coherence, and more controllable camera language in a single generation flow.
On Vidofy.ai, Seedance 1.5 Pro becomes simpler to operationalize: pick the model, choose your workflow (text-to-video or image-guided generation), and iterate with a consistent UI—without managing separate tools for visuals, voice, SFX, and timing alignment. For teams, Vidofy’s unified access across models also makes it easy to benchmark results against alternatives like Veo.
Native-Audio Showdown: Seedance 1.5 Pro vs Veo 3.1
If you’re choosing a model for cinematic short-form video, the deciding factors usually come down to: (1) how well it follows direction, (2) whether audio is truly integrated, and (3) how reliably it stays consistent across shots. Below is a specs-first comparison based only on official documentation and releases; anything not confirmed is clearly marked.
| Feature/Spec | Seedance 1.5 Pro | Veo 3.1 |
|---|---|---|
| Model type | Audio-visual video generation model (joint audio-video generation) | Video generation model (Gemini API / Veo) |
| Native audio generation | Joint audio-video generation (native audio-visual synchronization) | Native audio generation |
| Supported generation modes | Text-to-audio-video + image-guided audio-video generation | Text-to-video + image-based direction + video extension + first/last frame transitions |
| Default clip length (officially stated) | Not verified in official sources (latest check) | 8 seconds |
| Resolution options (officially stated) | Not verified in official sources (latest check) | 720p / 1080p / 4k |
| Aspect ratio controls (officially stated) | Not verified in official sources (latest check) | 16:9 or 9:16 |
| Reference images guidance (officially stated) | Not verified in official sources (latest check) | Up to 3 reference images |
| Accessibility | Instant on Vidofy | Veo 3.1 also available on Vidofy |
Detailed Analysis
Analysis: Audio-first storytelling vs. video-first generation
Seedance 1.5 Pro is positioned by ByteDance Seed as a foundation model engineered specifically for joint audio-video generation—meaning synchronization isn’t a post-step, it’s part of the model’s core objective. This is especially relevant for dialogue-driven clips, multilingual lip-sync, and scenes where timing (beats, impacts, vocal cadence) must match motion.
Veo 3.1 also offers natively generated audio and adds a mature “builder” surface via the Gemini API documentation (reference images, extension, first/last frame transitions). If you’re prioritizing a broad set of official API controls, Veo’s published capabilities are currently clearer and more parameterized.
Analysis: Getting from idea → iterations (where Vidofy helps most)
Regardless of which model you choose, most teams lose time in the same places: rewriting prompts, re-running generations, tracking versions, and exporting deliverables. Vidofy turns Seedance 1.5 Pro into a repeatable workflow—centralizing prompt iteration, model switching, and output management in one place, so you can evaluate results on creative intent (acting, camera language, coherence) rather than tool friction.
Verdict: Choose Seedance 1.5 Pro when audio-sync and “directed” motion are the priority
How It Works
Follow these 3 simple steps to get started with our platform.
Step 1: Choose Seedance 1.5 Pro on Vidofy
Select Seedance 1.5 Pro from the model library and choose your workflow (text-driven generation or image-guided generation).
Step 2: Direct the scene with prompt + dialogue cues
Describe action, emotion, environment audio, and camera intent. If you want spoken lines, include them explicitly in the prompt so timing and delivery can be generated with the scene.
Step 3: Generate, iterate, and export
Review the result, refine direction (acting, camera movement, mood, pacing), then export your final clip—without juggling separate tools for visuals, voice, and sync.
Frequently Asked Questions
What is Seedance 1.5 Pro?
Seedance 1.5 Pro is described by ByteDance Seed as a next-generation audio-visual generation model designed for joint audio-video generation (native synchronization), cinematic camera control, and stronger narrative coherence.
Does Seedance 1.5 Pro generate audio and video together (not as a separate soundtrack step)?
Yes. Official ByteDance Seed materials describe Seedance 1.5 Pro as a joint audio-video model intended for native audio-visual generation and synchronization (including dialogue timing and lip alignment).
Can I use Seedance 1.5 Pro for text-to-video and image-guided generation on Vidofy?
ByteDance Seed’s technical report describes both text-to-audio-video synthesis and image-guided audio-video generation as supported tasks. Availability of specific modes in Vidofy depends on the current product UI, but Vidofy is designed to expose supported modes directly in the workflow.
What are the maximum duration, resolution, and FPS limits for Seedance 1.5 Pro?
Not verified in official sources (latest check). Vidofy will surface the exact, currently supported output options inside the generation settings for your workspace.
Do I get commercial rights to videos I generate with Seedance 1.5 Pro on Vidofy?
Commercial usage rights depend on the applicable terms for your Vidofy plan and the underlying model/provider terms. Review your Vidofy Terms and the provider’s policies before using outputs in ads, client work, or resold media.
Do I need a powerful GPU or special setup to run Seedance 1.5 Pro?
No local setup is required to get started on Vidofy. You generate in the cloud through the Vidofy interface, which is designed to remove the need for manual environment configuration, dependency management, or GPU provisioning.