Seedance 2.5 AI Video Generator Native 4K cinematic video
Seedance2Max is a Seedance 2.5 AI video generator for advertising, film and brand teams. Generate native 4K at 10-bit color depth — a full 30-second take in a single pass, with dialogue, music and lip-sync rendered as native audio alongside the picture.
Seedance 2.5 4K Video Generator
@Image1
@SceneCinematic 4K spirits commercial, anamorphic look, 10-bit grade, deep teal shadows against warm practicals.
[00:00-00:07] Establishing wide of the rain-soaked rooftop bar in @Scene with a slow dolly-in, volumetric haze and a neon key light from screen left.
[00:07-00:16] Cut to a medium tracking shot of the bartender in @Image1 as she turns to camera. Hard rim light behind her, shallow depth of field.
[00:16-00:24] Macro push-in on the pour: specular highlights roll across the glass, ice cracks, condensation beads on the coupe.
[00:24-00:30] Crane up to a wide silhouette against the skyline as the practicals fall to black. Score follows @Audio1 with rain ambience and one synth swell on the final beat.
Native 4K means 3840×2160 generated directly, not upscaled, in 10-bit color, across all five supported aspect ratios. Up to 30 seconds in a single pass, with dialogue, music and sound effects rendered together with the picture.
Generate in 4KSeedance2Max provides access to ByteDance's Seedance 2.5 model.
Seedance 2.5 Shot Briefs You Can Adapt for 4K Video
Each card below is a creative brief — a shot recipe you can adapt — describing the kind of shot the model is built to produce: native 4K at 3840×2160, 10-bit colour, and up to 30 seconds in a single pass with dialogue, music and sound effects generated alongside the picture. Browse by category to see how the shot language changes from product ads to cinematic scenes, avatar explainers and vertical social.
Stills shown are illustrative reference frames used to picture each creative brief — they are not actual Seedance 2.5 output.
Rain-soaked alley chase, anamorphic look, one continuous take
A lone runner cuts through neon puddles while the camera tracks alongside at hip height, then cranes up as the alley opens out. Thirty seconds generated in a single pass means no stitch point mid-chase, and 10-bit colour depth leaves real headroom in the shadows when you grade it.
Macro orbit around a glass fragrance bottle on wet stone
A slow orbit holds focus on the label while backlight refracts through the glass and a mist plume drifts past. Native 4K at 3840×2160 is generated directly rather than upscaled afterwards, so the etched type survives a crop down to a hero banner.
Editorial street walk in hard sun, vertical campaign cut
A model crosses a sunlit intersection in a tailored coat; the camera holds a low three-quarter angle before settling into a static portrait beat. Built vertically for feed placements, with up to 30 reference images available to keep the garment, styling and face consistent across every take.
Studio presenter walks through a product update, direct to camera
A presenter at a lit desk delivers a 30-second explainer in one unbroken take, with a graphic beat dropped in at the midpoint. Dialogue and lip-sync are generated together with the picture in the same pass, and phoneme-level lip-sync covers 8+ languages when you need localised cuts.
Handheld morning-routine vlog in window light, vertical UGC
A creator talks to the lens while moving through a kitchen, loose and handheld, cutting to a countertop insert. Timestamp-level control lets you pin the insert, the spoken line and the music hit to exact seconds instead of re-rolling the whole clip.
Neon megacity flythrough for a game concept trailer
The camera drops between rain-lit towers, banks past a hologram billboard and settles on a rooftop silhouette. Music and sound effects are generated alongside the picture rather than added in post, so the score lands frame-accurately on each camera move.
What Is Seedance 2.5?
Seedance 2.5 is ByteDance's multimodal AI video generation model, released on July 31, 2026, that produces up to 30 seconds of video in a single take at native 4K (3840×2160) with 10-bit color, and generates dialogue, music, sound effects and lip-sync in the same pass as the picture. It works from text prompts, images and reference clips, and ByteDance positions it as "One-take Creation, Flexible Referencing."
Seedance2Max is an independent platform that gives you access to that model — we are not ByteDance and are not endorsed by ByteDance. The model's public API opened on August 7, 2026 through BytePlus ModelArk internationally and Volcengine in China.
Inside the DB-DiT architecture
The model runs on a Dual-Branch Diffusion Transformer (DB-DiT): two separate diffusion branches, one for video and one for audio, that stay in constant communication as they generate. Because neither branch waits for the other to finish, sound is not layered on afterwards — it emerges alongside the frames, which is what delivers frame-accurate audio-video sync and phoneme-level lip-sync. The architecture was introduced with Seedance 2.0 and carried forward into 2.5.
The two branches exchange signal at every denoising step rather than at the end of generation, so a mouth shape and its phoneme are resolved together instead of picture arriving first and sound being fitted to it afterward. That step-by-step cross-talk between the video and audio branches is what lets a cut, a footstep or a line of dialogue land on the exact frame it was directed to hit, instead of drifting the way it does when video and audio are generated as separate passes and stitched together in post.
Four Capabilities Behind 4K Cinematic Output
Native 4K video generation at 10-bit color, 30 seconds in one continuous take, dialogue and sound generated with the picture, and up to 50 multimodal references per shot. These are the model controls that decide whether a clip survives a real edit.
Native 4K at 10-Bit Color
Output spans 720p, 1080p and native 4K at 3840×2160 — and the 4K frame is generated directly, not upscaled after the fact. Every frame renders at 10-bit color depth instead of the usual 8-bit, which leaves real headroom in shadows and highlights. That is the difference between footage a colorist can grade and footage that falls apart the moment you push it.
30-Second One-Take, Extendable to ~180s
Seedance 2.5 generates up to 30 seconds in a single pass — double the 15 seconds of Seedance 2.0 — with no stitching between shots. Multi-round extension reaches roughly 180 seconds in beta while holding character, environment and narrative consistency. A one-take AI video leaves no seams to hide in the edit.
Native Audio Generated With the Video
Dialogue, music, sound effects and lip-sync are generated in the same pass as the picture, not bolted on in post. The Dual-Branch Diffusion Transformer (DB-DiT) runs separate but constantly communicating video and audio branches, which is what makes frame-accurate sync and phoneme-level lip-sync possible across 8+ languages. AI video with native audio removes an entire round of post-production.
50 Multimodal References Per Generation
Attach up to 50 references to a single generation, split across images, video clips and audio. Images lock identity, product and location; video clips carry movement and camera behavior; audio sets voice, music and rhythm. Feeding the model that much reference material is how a brand shot stays on model instead of drifting.
Plan the Shot, Then Revise It Without Starting Over
Seedance2Max puts two of the model’s real control surfaces into a production workflow: previs guidance that fixes staging before generation, and timestamp plus region-level direction that fixes a shot after it. Both are native controls, not bolted on after the fact.
Storyboard, Keyframe and White-Model Previs
Bring storyboards, keyframes or white-model previs frames into the prompt to define shot order, composition and staging before a single frame is generated. Seedance 2.5 also takes green-screen, camera-perspective and reference-based editing guidance, so the blocking you plan is the blocking that comes back. Settling the shot up front is cheaper than regenerating a 4K take.
Timestamp Direction and Region-Level Editing
Direct actions, shot changes, dialogue, sound and transitions at second-level timestamps, so each note lands on the exact beat it belongs to. Region-level frame editing revises a selected area or segment while everything around it stays put. Fix one product close-up or one line of dialogue without rebuilding the whole video.
Who Seedance 2.5 Is Built For
Seedance2Max gives any team access to ByteDance's multimodal video model, built for anyone who has to hand over a finished 4K deliverable: native 4K at 10-bit color, up to 30 seconds in a single take, with audio generated alongside the picture.
Ad and Brand Creative Teams
Build hero cuts, teasers and campaign variants at native 4K (3840x2160) — the frame is generated directly at 4K rather than upscaled afterwards, so the master holds up wherever the media plan puts it. 10-bit color depth leaves headroom in shadows and highlights when the grade comes back with notes. Reference images hold product and brand consistency across a set, and timestamp-level control places the beat, the reveal and the end card exactly where you want them.
Film and Cinematic Storytelling
Block a scene, test a look or cut a concept trailer with up to 30 seconds generated in a single pass — one take, no stitching, so performance and lighting carry straight through the shot. Multi-round extension reaches roughly 180 seconds in beta while preserving character, environment and narrative consistency. Guide the model with storyboards, keyframes or white-model previs, and use camera-perspective control to direct a shot instead of describing it.
Ecommerce and Product Marketing
Turn a single product photo into motion with image-to-video, using improved product consistency to keep the item recognizable as the camera moves around it. Feed up to 30 reference images so the same SKU reads the same way across an entire variant set. Switch between landscape, square and vertical framing and the same idea fits a product page, a marketplace listing and a vertical feed without a reshoot.
AI Avatar, Training and Explainer Video
Produce presenter-led explainers, onboarding modules and course segments where dialogue, sound effects and lip-sync are generated together with the picture in one pass, not dubbed on afterwards. Multilingual lip-sync covers 8+ languages at phoneme-level accuracy — English, Mandarin, Cantonese, Japanese, Korean, Spanish, French, German and Portuguese — so one script can ship to several markets. Educational content is one of the uses ByteDance states for the model.
Social and Short-Form Creators
Text-to-video turns a hook into a finished clip without a shoot, and native audio means music, sound effects and voice arrive with the video instead of a separate edit pass. Generate straight to 9:16 or 1:1 for vertical feeds, then use region-level editing to fix one part of a frame rather than re-rolling the whole thing. When a format works, keep it: up to 50 references per generation — a mix of images, video clips and audio files — hold the look steady across a series.
Agencies and Production Studios
Deliver client work at native 4K in 10-bit color, with green-screen and reference-based editing for compositing into an existing brand system. Revisions stay contained: region-level editing revises a selected area or segment while the rest of the frame stays stable, and timestamp-level control moves a beat without rebuilding the whole cut. Text-to-video, image-to-video and reference-to-video all run from the same Seedance2Max workspace.
How to Use Seedance 2.5 for 4K Video
Three steps from a blank prompt to a finished 4K clip. The model generates picture and audio together in one pass, so the craft sits in how you write the shot and which references you attach.
Describe the Shot
Write the prompt like a shot list: subject, setting, camera move, lighting and pacing. For multi-shot sequences, mark each beat with a timestamp — Seedance 2.5 accepts second-level direction over actions, shots, dialogue, sound and transitions.
Add References
Attach up to 50 references in a single generation, split across images, video clips and audio. Images lock a character, product or style, video sets the motion and pacing, and audio fixes the voice or music bed.
Generate and Export
Choose 720p, 1080p or native 4K at 3840×2160, a length of up to 30 seconds in one pass, and any of its five aspect ratios, from widescreen to vertical to square. Export straight to ads and social, or hand the 10-bit file to your editor with grading headroom intact.
Seedance 2.5 Prompt Examples You Can Copy
Paste any of these prompts straight into the generator. Each one uses timestamped beats, explicit camera and lighting direction, and an audio instruction, because the model reads all three.
4K Product Ad Prompt
30-second product commercial for a frosted-glass skincare serum. Native 4K, 16:9, 10-bit cinematic grade, photoreal. 0:00–0:06 — macro push-in on the bottle standing on wet black marble; one droplet rolls down the glass; hard key light from camera left, deep falloff into shadow. 0:06–0:14 — slow 180° orbit around the bottle as backlit vapour drifts through frame; amber rim light catches the cap. 0:14–0:22 — top-down shot, hands dispensing the serum onto skin in shallow focus; light softens to a warm even studio wash. 0:22–0:30 — pull back to a locked-off hero shot with clean negative space on the right for a logo lockup. Audio: low warm ambient pad throughout, one crisp droplet sound at 0:04, no voiceover. Keep the bottle shape, label and colour identical in every beat.
Timestamped beats give the model second-level control of the camera move, and the ambient bed is generated with the picture rather than added in post.
Cinematic Narrative Prompt
30-second one-take narrative scene. Native 4K, 16:9, anamorphic-style flares, 10-bit teal-and-amber grade. 0:00–0:08 — a woman in a rain-soaked coat steps off a night bus onto a neon-lit street; handheld tracking shot from behind at shoulder height; signage reflected in the puddles. 0:08–0:18 — she stops at a shopfront window; camera arcs to a three-quarter profile; cool key from the glass, warm sodium spill from the street behind her. 0:18–0:26 — slow dolly-in to a close-up as she reads a note; shallow depth of field, bokeh from passing headlights. 0:26–0:30 — she looks up off-camera; hold the frame as a car passes and the light shifts across her face. Dialogue at 0:20, English, quiet and close: "I told you I'd wait." Audio: steady rain, distant traffic, a single low cello note swelling under the line. Keep her face, hair and coat consistent across every beat.
The whole scene renders in one 30-second pass, so the character, the rain and the grade stay continuous with no stitching between shots.
AI Avatar Explainer Prompt
30-second presenter explainer. Native 4K, 16:9, clean modern studio, natural 10-bit skin tones. 0:00–0:05 — medium shot of a presenter in a charcoal knit at a light-oak desk; soft key from camera left, gentle hair light, studio softly defocused behind. 0:05–0:18 — slow push-in to a medium close-up as she talks; natural hand gestures, steady eye contact with the lens. 0:18–0:26 — over-the-shoulder angle as she turns to a blank display panel on the right; keep the panel clean for graphics added in the edit. 0:26–0:30 — return to the medium shot for the closing line, then hold two beats. Dialogue, English, warm and conversational, lip-synced: "Most teams lose a week on the first cut. Here's how to get it back." Audio: quiet room tone, a light rising synth bed under the final line. Keep her face, hair and wardrobe identical in every shot.
Lip-sync is generated alongside the video in the same pass; add a portrait reference image to hold the presenter’s look steady across re-runs, and re-render in 9:16 for vertical social.
Seedance 2.5 Model Parameters and 4K Video Specs
Every number below comes from ByteDance's official release notes for the model: native 4K resolution, 10-bit color, and 30-second one-take generation, all available through Seedance2Max.
Model
Seedance 2.5
ByteDance's multimodal video model, available through Seedance2Max
Max Resolution
Native 4K (3840×2160)
The 4K frame is generated directly, not upscaled afterwards
Color Depth
10-bit color
More headroom in shadows and highlights for grading than 8-bit
Resolution Tiers
720p / 1080p / 4K
Output spans 720p and 1080p up to native 4K
Native Clip Length
Up to 30 seconds
One take in a single pass with no stitching, double Seedance 2.0's 15s
Extension
Up to ~180 seconds (beta)
Multi-round extension keeps character, environment, and story consistent
Native Audio
Dialogue, music, SFX, lip-sync
Generated jointly with the video in one pass, not in post-production
Languages
8+ lip-sync languages
Phoneme-level lip-sync; ByteDance cites 10+ languages supported overall
Architecture
Dual-Branch Diffusion Transformer
DB-DiT pairs communicating video and audio branches for A/V sync
Input Modes
Text, image, reference to video
Start from a written prompt, a still image, or a set of references
Image References
Up to 30 images
Still references for character, product, and brand consistency
Video References
Up to 10 clips
Reference footage to guide motion and camera perspective
Audio References
Up to 10 files
Reference dialogue, music, or sound effects for the audio branch
Total References
Up to 50 assets
30 images plus 10 video clips plus 10 audio files per generation
Direction
Timestamp-level control
Direct actions, shots, dialogue, sound, and transitions second by second
Editing
Region and local segment editing
Revise a selected area or segment while the rest of the frame stays stable
Aspect Ratios
16:9 · 9:16 · 1:1 · 4:3 · 3:4
Covers landscape, vertical, and square delivery formats
Shoot it in native 4K with Seedance 2.5
One 30-second take, generated directly at 4K in 10-bit color, with dialogue, music and lip-sync produced in the same pass. Bring up to 50 image, video and audio references and direct the shot second by second on Seedance2Max.
Credits cover generation cost, so before you start it's worth seeing what each plan includes.