Seedance 2.0 Fast Reference to Video: the stack is the brief (4s, 5s, 6s, 720p, 25cr)
Seedance 2.0 Fast Reference to Video is reference-to-video. Upload the stills that must appear. Do not spend the whole budget because the slider goes that far.
Seedance 2.0 Fast Reference to Video is reference-to-video. Upload the stills that must appear. Do not spend the whole budget because the slider goes that far.
Seedance 2.0 Fast Reference to Video is ByteDance's fast, discounted reference-to-video row: cinematic clips from reference images, videos, and audio, with native audio-visual sync, 720p ceiling, 25 credits, durations 4s through 15s. The catalog does not require an image, but the job does. A text-only prompt on this family is how the product you meant to lock never enters the frame.
The stack is the brief
Reference limits are published on the record: up to 9 images, 3 videos, 3 audio. That stack is the brief. The prompt owns what happens. The uploads own who is in it. Disagreeing references help (front, three-quarter, label crop). Nine near-duplicates of the same hero waste the slots.
Set up reusable characters and products is how those stills become a kit instead of a one-off upload. The product consistency guide is the longer version. This page is only this fast row.
Fast is a listed feature. So are cinematic, audio sync, camera control, and lipsync. None of those replace the stack. A pretty prompt with empty slots is a text-to-video job wearing the wrong name.
4s, 5s, 6s — and the rest of the ladder
Duration is not three buttons. It is 4s, 5s, 6s, 7s, 8s, 9s, 10s, 11s, 12s, 13s, 14s, 15s. The title's 4s / 5s / 6s are the cheap end of that ladder, not the only lengths. Fifteen seconds is the ceiling on this record. The slider going to 15 is not a reason to render 15. A 6-second product orbit that holds is cheaper than a 15-second wander that drifts the label.
Max output resolution is 720p, with 480p also listed. Aspect options include 21:9, 16:9, 4:3, 1:1, 3:4, 9:16, adaptive, and auto. Plan delivery around 720p. This is not the 4K cinematic row.
Native audio still needs a written track
Audio is on. Native sync is the point of the family. A silent prompt still gets a soundtrack you did not choose — same rule as every native-audio video row. If the clip must say a line, put the line in the prompt or put it in an audio reference. The three audio slots are for that, not for a playlist.
The AI video generator will run the generate. It will not stop you from maxing duration "because Fast is cheap." Twenty-five credits is the catalog price; the row is discounted. Neither fact means the last three seconds were free of drift.
Stop the slider where the product holds
Use 4s, 5s, or 6s when the job is a turn, a pick-up, or a talking close-up that already has a locked face in the stack. Climb only when the action actually needs the extra seconds. Seedance 2.0 Fast Reference to Video is 720p, 4–15s, 25 credits, native audio, nine stills. That is the whole row. Seedance prompting covers energy and vertical. This page is the stack and the stop.
FAQ
Does this row require an image?
The catalog flag does not require one. The job does. Reference-to-video without the stills that must appear is a text-to-video generate in the wrong slot.
Why does the title say 4s, 5s, 6s if the model goes to 15s?
Those are the lengths you should default to. The record supports every second from 4 through 15. Fifteen is a ceiling, not a target.
Is 720p a draft setting?
Max output resolution is 720p. 480p is also listed. If the delivery spec is 4K, this is the wrong row, not a quality toggle you missed.
Can I skip audio in the prompt because I uploaded a track?
You can feed up to three audio references. You should still name what we hear if the sync has to match the picture. Native audio will fill silence you left blank.