Seedance 1.5 Pro
ByteDance's cinematic image-to-video AI model that generates high-quality 1080p videos with natively synchronized audio from static images in a single pass.
ByteDance 
WaveSpeed Image-to-video with natively synchronized audio
Seedance 1.5 Pro is an image-to-video generation model developed by ByteDance that transforms static images into cinematic video clips at up to 1080p resolution. It uses a dual-branch Diffusion-Transformer (DB-DiT) architecture to generate video and audio simultaneously in a single pass, producing millisecond-level lip-sync and environmental audio without requiring post-production editing. Videos can range from 5 to 10 seconds in duration and support aspect ratios including 16:9, 9:16, and 21:9.
What distinguishes Seedance 1.5 Pro is its native audio-visual synthesis, which generates speech, sound effects, and ambient audio in sync with the video rather than layering them separately afterward. It supports multilingual lip-sync across six languages and offers over 15 controllable camera movements — such as dolly zooms, tracking shots, and orbits — specified through text prompts. The model is well-suited for content creators, marketers, and developers working on dialogue-driven content, social media clips, and multilingual voiceover projects where visual consistency and synchronized audio are required.
What Seedance 1.5 Pro supports
Image-to-Video
Converts a static source image into a dynamic video clip at resolutions up to 1080p, with durations of 5 to 10 seconds per generation.
Native Audio Synthesis
Generates speech, sound effects, and ambient audio simultaneously with video in a single pass using a dual-branch Diffusion-Transformer architecture, eliminating the need for separate audio post-processing.
Multilingual Lip-Sync
Produces accurate lip-sync across six languages with dialect-specific support, maintaining character identity and mouth movement alignment throughout the clip.
Camera Movement Control
Supports over 15 professional camera movements — including dolly zooms, tracking shots, orbits, pans, and tilts — controllable via text prompts.
Aspect Ratio Selection
Allows selection of output aspect ratios including 16:9, 9:16, and 21:9 to match platform requirements such as landscape, portrait, or cinematic formats.
Resolution Options
Offers selectable output resolutions of 480p, 720p, and 1080p, with a 5-second 1080p clip generating in approximately 41 seconds.
Reproducible Generation
Accepts a seed value as input so that specific outputs can be reproduced or iterated upon consistently across generation runs.
Complex Prompt Following
Handles multi-subject, multi-action text prompts with precise instruction following, enabling detailed scene and motion descriptions in a single generation.
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Get Started FreeCommon questions about Seedance 1.5 Pro
What input does Seedance 1.5 Pro require to generate a video?
The model takes a static image URL as its primary input, along with text prompts and configuration options such as resolution, aspect ratio, duration, and an optional seed value.
What is the context window for Seedance 1.5 Pro?
The model has a context window of 1,000 tokens, which applies to the text prompt input used to guide video generation.
What resolutions and durations does the model support?
Seedance 1.5 Pro supports output resolutions of 480p, 720p, and 1080p, with video durations ranging from 5 to 10 seconds. Aspect ratios include 16:9, 9:16, and 21:9.
Does the model generate audio automatically, or is it added separately?
Audio is generated natively in the same single pass as the video using the dual-branch Diffusion-Transformer architecture. Speech, sound effects, and ambient audio are synchronized with the video without requiring separate post-production steps.
What languages does the lip-sync feature support?
The model supports accurate lip-sync across six languages, with dialect-specific support included for each.
Is there a knowledge cutoff date for this model?
No training cutoff date is specified in the available metadata for Seedance 1.5 Pro.
Documentation & links
Parameters & options
A specific value that is used to guide the 'randomness' of the generation.
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