bytedance/upscale/video
Transform and restyle clips to 4K using fast, precise ByteDance-powered generation.
This page covers the keyframes-to-video draft endpoint in the FLUX 3 family. You pin stills to frame indices and describe the path between them; the model returns a quick 720p clip so you can validate multi-beat timing without paying full FLUX 3 Keyframes rates.
The endpoint is built for the early loop of creative work: storyboard timing checks, multi-pose tests, and batch draft runs. When a take looks right, reuse the returned draft cache with draft-enhance for a fuller finish.
Transform and restyle clips to 4K using fast, precise ByteDance-powered generation.
Transform still images and voice tracks into lifelike talking avatars with precise motion control.
Create photo-based, speech-aligned videos with natural motion
Consistent characters, objects, and scenes in any setting or angle.
Image-to-video 3-15s clips at $0.084 per second.
Turn stills into cinematic motion clips with camera and audio control.
FLUX 3 Draft Key Frames to Video builds a fast 720p preview from a prompt and stills pinned to frame indices. It fits storyboard timing tests, multi-beat product reveals, and cheap multi-pose drafts.
Both pin stills to a timeline; FLUX 3 Draft Key Frames to Video returns a cheaper 720p preview plus a draft cache, while the full endpoint is better for polished 720p or 1080p deliverables.
FLUX 3 Draft Key Frames to Video requires a prompt and 1–10 keyframes (each with image_url and unique frame_index). Duration is 5–20 seconds so keyframe positions can be validated on a 24 fps timeline.
Use unique 0-based frame_index values at most duration × 24. Space beats so openings, turns, and endings land where your storyboard needs them when you run FLUX 3 Draft Key Frames to Video.
Along with the preview clip, FLUX 3 Draft Key Frames to Video returns a reusable draft cache you can pass to draft-enhance for a fuller-quality render.
Yes. Prototype in the RunComfy model UI, then call the same FLUX 3 Draft Key Frames to Video template through the RunComfy API with matching parameters. Generations consume usd / credits on both paths.
FLUX 3 Draft Key Frames to Video is billed at $0.06 per second of generated draft video at 720p. A 5-second clip costs about $0.30; longer durations scale with the output length.
Stay on FLUX 3 Draft Key Frames to Video for storyboard drafts and early multi-beat reviews. Move to full FLUX 3 Keyframes to Video or draft-enhance for sharper finals.
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.
