Seedance 2.0 Fast is the fast variant of ByteDance's Seedance 2.0 series, suitable for short-film concepts, character shot prototyping, and advertising asset iteration. doubao-seedance-2-0-fast-260128 supports text, image, and audio-video references, can generate videos with sound, and delivers short shots in 480p or 720p while balancing character references and creative control.
Submit requests to the public API at api.acedata.cloud using the documented parameters, then use the results in your application.
Input parameters and result formats vary by service. Use the public API for this model and follow its guide for generation, task retrieval and editing operations.
Clarify capacity, inputs and outputs, and invocation methods before selecting a model.
The above are the available specifications and control methods for this model on this platform; invocation parameters do not represent all capabilities of the native model.
Learn what doubao-seedance-2-0-fast-260128 can bring to your work.
Use reference_image to provide the appearance of a character or subject, then describe new scenes, clothing, actions, and camera movement in text. It is suited to creating “the same character in different stories,” without treating the photo background as a fixed scene; clear, front-facing, unobstructed character assets make it easier to establish references.
In addition to images, you can add reference_video and reference_audio to guide motion, camera movement, and sound rhythm. Enable generate_audio to create videos with sound; prompts should separately describe what happens on screen, how the camera moves, and what you want to hear, avoiding conflicting intent across multiple assets.
Use first_frame when you need motion to begin from a specified image, and add last_frame when you need to control the ending image; use reference mode when you want to redesign the composition. You can also reduce camera-movement variation with a fixed camera and request the final frame to check shot closure or prepare the starting image for the next segment.
Start with specific tasks to find where the model can be effective.
Input authorized character photos and single-shot descriptions, such as a person walking in a park or turning and smiling, then select a vertical aspect ratio to generate a short clip. Keep the reference character unchanged while modifying the scene and actions separately to deliver a set of candidate storyboards for selecting character performance and narrative direction.
Use a product image as the first frame, specify a camera push-in, lighting changes, or environmental motion, validate the concept in 480p first, then generate the selected version in 720p. If the background needs to be rearranged, use the subject reference method instead; the deliverable is short shots for editing selection, not a complete advertising project.
Write scenes such as rainy streets, beaches, or indoor activities as prompts, use legally obtained audio and video materials to guide the rhythm, and enable sound generation. Output audiovisual drafts in landscape or widescreen aspect ratios for directors, animation teams, or content editors to discuss environmental atmosphere, motion direction, and sound design.
Choose based on task complexity, input materials, and expected results.
When the delivery target is a 480p or 720p short shot and character and audio-video references are needed, 2.0 Fast is suitable for creative prototyping and screening multiple options. If the task explicitly requires 1080p or 4k, choose the 2.0 standard version; Mini is the lightweight option in the same series. Fast's positioning does not mean every task has a fixed completion time.
2.0 Fast is suitable for generating new 4–15 second shots, and reference videos should not be understood as a full video editing mode. If you need up to 30 seconds, want to create using only audio references, or explicitly need to edit and extend existing videos, choose Seedance 2.5. The selection should be based on the required operation, not just the model generation.
Move from a small-scale task to formal integration.
Clarify the goal, required inputs, and output requirements, and use real business examples as a starting point.
Open the trial page, confirm the parameters supported by this entry point, then submit a small-scale task to review the results.
Keep the complete model ID, use the request format specified in the documentation, and confirm billing rules on the Pricing page.
Before formal use, understand the output quality and capability scope.
Answers to common questions when using doubao-seedance-2-0-fast-260128.
reference_image is used to guide the appearance of a person or subject, while the scene, clothing, and actions can be described anew; first_frame makes the video begin moving from the given image. Choose the first frame to preserve the original image composition, and choose a reference image to place the same person in a new scene. Do not mix the two modes.
Yes, enable it by setting generate_audio=true; audio is not generated by default. Prompts can describe ambient or action sounds at the same time; reference_audio is used as a reference for sound and rhythm and does not mean the final video will necessarily reproduce the input audio word for word or segment by segment.
This version uses 480p, 720p, and a 4–15 second range, and automatic duration can also be selected. For 30-second tasks, choose Seedance 2.5; for 4k tasks, choose the 2.0 standard version. Automatic duration lets the model decide the length; it does not remove this model's duration limits.
Fast can use a video as reference_video to help guide the motion and camera movement of a new shot, but do not treat it as an edit or extend operation. When you need to explicitly modify an existing video or lengthen a clip, choose 2.5 and organize materials and parameters according to the corresponding task mode.
Submit the exact model value and content array to /seedance/videos. Text items support up to 1000 characters, and image URLs use image_url objects. You can set async=true and then query task_id, or configure callback_url to receive completion notifications, then obtain the video from data.video_url.
Model information · Updated: 2026-10-01. For calling parameters and billing rules, see the API and pricing sections.
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