Seedance 1.5
ByteDance · AI videoSeedance 1.5 Pro is ByteDance's advanced AI video generation model, officially released in late 2025. It uses a dual-branch diffusion transformer (DB-DiT) to generate synchronized audio and video in a single pass, with strong lip-sync and professional camera control. The model targets creators, marketers, and production teams who need native audio-visual output without separate dubbing or Foley.
VidMachine offers Seedance 1.5 as a video option so you can produce short-form clips with integrated dialogue and sound, cinematic camera moves, and flexible input modes (text-to-video, image-to-video, first-frame, first-last-frame). It is a strong fit for narrative and dialogue-heavy content, ads, and social shorts where audio-visual alignment matters.
ByteDance has emphasized speed improvements over earlier versions—inference can be significantly faster while delivering 720p to 1080p output in seconds. That makes Seedance 1.5 Pro viable for both one-off hero clips and higher-volume production.
Key features and benefits
Native audio-visual generation
Seedance 1.5 Pro generates video and audio together in one pass, with millisecond-precision alignment and accurate lip-sync across multiple languages and dialects. You avoid separate dubbing and sync steps. The dual-branch architecture is designed so that audio and video are coherent from the start—mouth movements match speech, and sound effects align with action. This is especially valuable for talking-head content, character dialogue, and any clip where lip-sync and timing are critical.
Speed and resolution
The model offers much faster inference than earlier versions, producing 720p to 1080p video in seconds. It supports flexible aspect ratios (16:9, 9:16, 1:1, 4:3, 21:9) and durations from about 2 to 12 seconds. You can match common short-form formats and iterate quickly. The combination of speed and quality makes it suitable for both rapid prototyping and final delivery.
Cinematic camera control
Professional camera moves—pan, tilt, zoom, dolly zoom, tracking—can be executed within a single generation. The model has strong semantic understanding for narrative coherence and color grading, so you can request specific camera language and get consistent, cinematic output. This supports both traditional filmic looks and more stylized or branded content.
Multiple input modes
Seedance 1.5 Pro supports text-to-video, image-to-video, first-frame, and first-last-frame input modes, giving you flexibility for different workflows and story structures. First-last-frame is useful when you know the start and end of a shot and want the model to fill the motion in between; first-frame is the classic image-to-video setup. Text-to-video works when you have no image and want to generate from scratch.
Technical specifications
Resolution720p to 1080p
Aspect ratios16:9, 9:16, 1:1, 4:3, 21:9
Duration2–12 seconds
AudioNative sync, multi-language lip-sync
Input modesText-to-video, image-to-video, first-frame, first-last-frame
Use cases and applications
Seedance 1.5 Pro targets creators, marketers, production teams, and agencies who need professional short-form video with dialogue and cinematic motion: film and TV pre-vis, ads, social content, and narrative pieces. Use it when native lip-sync and integrated audio are requirements—explainers, testimonials, character-driven shorts, and branded stories all benefit.
The camera control and multi-mode support make it a good fit for serial content where you want consistent style and professional movement. Agencies can use it for client work and pitch reels; in-house teams can use it for product launches and social campaigns. The speed improvement over earlier Seedance versions also supports higher-volume output when you need many clips in a short time.
On VidMachine, Seedance 1.5 can be set as primary or fallback in your video model priority. Its credit cost per second is competitive, so it is a viable default for dialogue-heavy and narrative projects.
Why this model
Seedance 1.5 Pro stands out for integrated audio-visual generation and camera control. On VidMachine it is a strong option when you want native lip-sync and cinematic movement without a separate audio pipeline. Credit cost per second is competitive, so it fits both quality-focused and volume-focused workflows.
If you are choosing between Seedance 1.5 and other models, consider it when dialogue and lip-sync are central to your content. For purely visual or abstract clips, other models may be sufficient; for talking heads and character speech, Seedance 1.5 Pro's native audio is a differentiator.
How VidMachine uses it
You can select Seedance 1.5 in your project's video model priority on VidMachine. It is used to generate video clips from prompts and start frames. Combine it with our image models and narrator for full workflows. See Pricing and Docs for credits.
Credits are consumed per second of generated video. For exact rates and how fallbacks work when the primary model fails, check the Pricing page and documentation.
What you should know
Does Seedance 1.5 Pro generate audio?
Yes. It generates synchronized audio and video in one pass with accurate lip-sync.
What aspect ratios are supported?
Seedance 1.5 Pro supports 16:9, 9:16, 1:1, 4:3, and 21:9.
How are Seedance 1.5 credits charged on VidMachine?
Video generation uses credits per second. See the Pricing page for rates.