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Models

Upscale a video with FLUX 3.

Submits a video upscaling task: 1.5x-3x super-resolution of the source clip (up to 2560x1440 in, 13.75 MP output frames). The upscale covers the first 20 seconds of the source; clips well past that are rejected. creativity selects precise source-faithful upscaling (0) or creative detail enhancement (1).

post/v1/flux-tools/video-upscale-v1

Request body

input_videostring required

The clip to upscale: base64-encoded mp4 (max 50MB) or an http(s) URL. The upscale covers the first 20 seconds; a clip slightly over that is upscaled up to the 20 second mark, and one well over is rejected. At most 2560x1440 (3.7 megapixels) per frame: this endpoint upscales toward 4K, so downscale a larger source before submitting it.

promptstring

Optional description of the clip's content, steering the enhanced detail. Leave empty for a neutral upscale.

creativity0 | 1

Upscale behavior: 0 preserves the source precisely; 1 allows creative detail enhancement.

upscale_factornumber

Output scaling relative to the source resolution, between 1.5 and 3. The output preserves the source aspect ratio and is capped at a 13.75 MP frame: very large sources are upscaled by less than the requested factor.

safety_toleranceinteger

Tolerance level for harm moderation, between 0 and 4 with 0 the strictest. It bounds every harm class on the prompt, which is screened before any generation, and on the delivered frames, which are withheld when their sexual-content level exceeds what the tolerance allows. Sexual is capped at level 3 and hate at level 2 regardless of the requested tolerance.

webhook_urlstring uri nullable

URL to receive the result callback.

webhook_secretstring password nullable

Secret echoed in the webhook signature header.

Response

Successful Response

OR

Changes