Generate clips with fluid motion and audios for creatives
This page covers the 480p first-and-last-frame endpoint in the Seedance 2.5 family. You provide a start image and an end image, then describe the transition; the model returns a short video at 480p so you can validate keyframe bridges without paying full 720p rates.
The endpoint is built for the early loop of creative work: transition prompt tuning, timing checks, and batch draft runs. When a take looks right, move the same frames and prompt to the 720p sibling for delivery.
Generate clips with fluid motion and audios for creatives
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Seedance 2.5 FLF2V 480p is a ByteDance image-to-video endpoint that builds a 480p transition between a first frame and a last frame. It fits keyframe bridge trials, timing checks, and draft morphs where speed and cost matter more than final sharpness.
Both share the same first/last-frame path and duration window; Seedance 2.5 FLF2V 480p outputs at 480p for cheaper, faster iteration, while the 720p sibling is better for polished deliverables. Draft here, then reuse the same frames at 720p.
Seedance 2.5 FLF2V 480p requires a prompt plus exactly two images (first frame and last frame). Duration spans 4 to 30 seconds (default 5), with aspect ratios 16:9, 9:16, 1:1, 4:3, 3:4, 21:9, and 9:21.
Set an explicit seed on Seedance 2.5 FLF2V 480p while you change only the prompt or one frame. Holding duration and aspect ratio fixed also makes A/B tests easier to compare.
Yes. Prototype in the RunComfy model UI, then call the same Seedance 2.5 FLF2V 480p template through the RunComfy API with matching parameters. Generations consume usd / credits on both paths.
Seedance 2.5 FLF2V 480p is billed at $0.33 per second of generated video. Longer durations scale linearly with the length you select.
Stay on Seedance 2.5 FLF2V 480p for transition drafts and batch variants. Move to the 720p Seedance 2.5 first-and-last-frame model when you need sharper finals for delivery.
RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.





