Seedance 2.5
by ByteDance
Directed moves with exact first and last frames.
Up to thirty seconds, and your song rides on top.
Key features
First and last frame
Set where a move starts and where it ends, and the model walks the camera between your two images.
Up to thirty seconds
Four to thirty seconds per take, or automatic — long enough for a full verse phrase in one render.
Audio-driven motion
Feed the track and the picture follows it — beat, sway and lip movement move with your song.
Your master stays the master
Dimly renders Seedance with its own audio generation off and muxes your original song back, so the track is never reinvented.
Rich references
First/last frames, stills, video clips and audio — up to thirty seconds of each — shape every take.
Honest baseline
480p and 720p output make it the fast, economical pass for exploration before a 2K or 4K finish.
Technical specifications
Seedance 2.5
First/last-frame video model, served through dimly
4 input kinds
First/last frames, images, clips and audio
4 to 30s
Or automatic — the model picks the length
480p / 720p
The economical pass before a 2K/4K finish
Ratios
Vertical-first, matched to the brief
Audio in
Motion follows the track you attach
Silent out
Dimly muxes your original song back after render
Beat-locked
Sway and lip movement land on the beat
Prompt examples
Corridor push
The camera slides down a hotel corridor as a door swings open toward the neon street
Edit promptVinyl spin
The record drops, the groove catches, and the camera pulls back through the den
Edit promptUse cases
Verse-long moves
Thirty seconds covers a verse phrase in one take, so a slow push no longer needs stitching.
Exact endpoints
Match cuts, whip transitions and reveal shots that have to land on a specific frame.
Choreography checks
Block a move between two poses, watch it, adjust the endpoints, watch it again.
Beat-synced performance
Feed the track and the performance sways on it — useful for lip-adjacent chorus work.
Cheap exploration
720p renders keep the explore pass fast, so the doubtful ideas get tried too.
Finish on H3
Explore the move on Seedance, then hand the approved world to H3 for the character-locked master.
Overview
Seedance 2.5 is the first-and-last-frame model in dimly's picker. Give it two images and it walks a camera between them, from four up to thirty seconds, at 480p or 720p. Still images, clips and audio can ride along as references, and when audio is attached the motion follows it — beats, sway and mouth movement land on your track.
Why the silent render is a feature
On dimly, Seedance renders with its own audio generation switched off. Your original song is muxed back onto the finished take afterwards, so what you hear is always your master — not a model's approximation of it. The audio input still matters: it drives the picture even while the output stays silent.
Where MiniMax H3 is the better pick
When identity has to hold across many shots — one artist, one world, three shots around a chorus — H3's reference-to-video is the tool, with native stereo and up to 4K on Creator. Seedance is the directed-move specialist and the economical exploration pass: exact endpoints, longer runway, cheaper credits.
Seedance 2.5 on dimly
Seedance is available on Pro and Creator plans at 480p and 720p. Like every dimly generation, the credit cost is quoted and confirmed before the render runs, and takes land in the project workspace next to their H3 siblings for side-by-side comparison.
Simple pricing
Plan your video for free, then pick a plan that fits your release schedule.
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