Seedance 2.0: A Practical Guide to ByteDance's Multimodal Video Model

Seedance 2.0 is ByteDance's newer video generation model. The main change is not just better-looking output. It is the way the model accepts different kinds of inputs in the same generation: text prompts, first-frame images, last-frame images, reference images, reference videos, and reference audio.

That makes it useful for more than a simple "type a prompt, get a clip" workflow. You can describe the shot in text, attach a character reference, add a short motion reference, and ask the model to generate video with synced dialogue, sound effects, or background music.

This guide keeps the focus on the current user-facing controls.

What Seedance 2.0 supports

Seedance 2.0 can generate videos from text, from an image, or from a mix of reference inputs. The main inputs include:

Input	What it is for
prompt	The main text description for the video
image	A first-frame image for image-to-video generation
last_frame_image	An optional ending frame, used together with a first-frame image
reference_images	Up to 9 images for character, style, or composition reference
reference_videos	Up to 3 videos for motion transfer, video editing, or style reference
reference_audios	Up to 3 audio files for audio-led generation or lip-sync

There is one important constraint: first-frame and last-frame images should not be mixed with reference images. If you are controlling the first and last frame, use that path. If you need character or style references, use the reference-image path instead.

Native audio is part of the model

Seedance 2.0 can generate audio and video together. That matters because the sound is not just an extra layer added after the video is done. The model can create dialogue, sound effects, ambience, and music in the same generation pass.

For spoken dialogue, put the spoken line in double quotes inside the prompt. For example:

A close-up of a woman standing beside a rainy window. She looks toward the camera and says, "We should leave before sunrise." Soft room tone, distant thunder, slow camera push-in.

That does not guarantee perfect speech every time, but it gives the model a clear signal that the quoted text should be treated as dialogue.

Multimodal references are the real workflow change

The most practical improvement in Seedance 2.0 is the ability to combine several reference types:

• Use reference images for a consistent character, product, outfit, or visual style.
• Use reference videos for motion, camera behavior, editing, or continuation.
• Use reference audio for rhythm, speech, or lip-sync direction.

A prompt can refer to these files directly:

The character from [Image1] walks through the set from [Image2], following the dance rhythm from [Audio1]. Keep the same jacket, hairstyle, and lighting mood. Handheld camera, medium shot, natural movement.

This is a more controlled way to work than trying to describe everything from scratch. It is especially useful for product showcases, talking-head clips, short ads, outfit changes, and music-synced scenes.

Video editing and extension

Seedance 2.0 also supports reference-video workflows. You can provide a video and ask the model to change something while keeping other parts of the clip consistent, such as the motion, camera direction, or scene structure.

You can also ask it to continue a scene from a reference video. In practice, the best prompts are specific about what should stay the same and what should change:

Extend [Video1] by five seconds. Keep the same camera direction and the same character. The character turns toward the doorway, pauses, and the room lights dim. Keep the original warm color tone.

For editing, avoid vague instructions like "make it better." Tell the model what object, background, style, or action should change.

Resolution, duration, and aspect ratio

Seedance 2.0 currently supports 480p, 720p, and 1080p. This is worth separating from Seedance 2.0 Fast: the Fast variant supports 480p and 720p, but not 1080p.

The model also supports common aspect ratios:

Setting	Supported values
Resolution	480p, 720p, 1080p
Aspect ratio	16:9, 4:3, 1:1, 3:4, 9:16, 21:9, 9:21, adaptive
Duration	5, 10, or 15 seconds

The adaptive aspect ratio option lets the model choose a frame shape based on the inputs. Duration is selected from the fixed 5, 10, and 15 second options.

For early tests, start with a short 5-second clip. Move to longer durations and 1080p when the prompt and references are already working.

Seedance 2.0 vs Seedance 2.0 Fast

Seedance 2.0 Fast shares the same general workflow: text-to-video, image-to-video, multimodal references, native audio, and adaptive aspect ratio. The difference is the tradeoff.

Use Seedance 2.0 Fast when you want quicker iteration and can stay at 480p or 720p. Use Seedance 2.0 when quality is more important, or when you need 1080p output.

Prompting tips that usually help

A good Seedance 2.0 prompt does not need to sound like a technical specification, but it should answer a few concrete questions:

• Who or what is the main subject?
• What happens during the clip?
• What should the camera do?
• What should the model use from each reference file?
• Should there be dialogue, music, ambience, or no audio?

For example:

A ceramic coffee cup from [Image1] sits on a wooden cafe table. Steam rises slowly. The camera starts in a close-up, then pulls back to reveal a quiet morning cafe. Soft jazz in the background, natural window light, shallow depth of field.

That is more useful than "cinematic coffee ad" because it gives the model subject, motion, camera, audio, and mood.

When to use Seedance 2.0

Seedance 2.0 is a good fit when you need more control than a text-only model can offer. It is especially relevant for:

• Product videos where the object needs to stay recognizable
• Character clips where face, outfit, or style consistency matters
• Talking-head or presenter-style videos with generated speech
• Motion-transfer ideas based on a short reference video
• Video edits where you want to keep the original motion but change part of the scene

It is not a replacement for editing judgment. You still need to test prompts, compare outputs, and decide when a shorter or simpler prompt works better. But compared with a basic text-to-video workflow, Seedance 2.0 gives you more handles to control the result.