FLUX Video Upscale

FLUX Video Upscale is Black Forest Labs' video super-resolution endpoint. It takes a video and regenerates it at a higher resolution, up to 4K, rather than interpolating between the pixels already there. It is available as a standalone API endpoint, /v1/flux-tools/video-upscale-v1.

Send the clip to the FLUX Video Upscale endpoint with an upscale factor of 3x. Sources from 480p up are accepted, and the higher the source resolution, the less factor 4K takes: a 2K source gets there at 1.5x. Submitting is one POST with the video as an HTTP(S) URL or base64, then you poll the returned URL until the status is Ready and download the signed mp4.

The creativity parameter selects between them. Precise (creativity: 0) preserves the source exactly and sharpens it, which is the behavior of a precision upscaler. Creative (creativity: 1, the default) restores and invents fine detail more aggressively, the behavior of a creative upscaler, and produces the sharpest result. Creative does not preserve identity as strictly, so faces and products can drift. Use precise when a face, product or brand asset has to stay exactly as it is.

A precision upscaler adds detail and removes noise while leaving the original content essentially unchanged, so it is safe for text, logos and recognizable faces. A creative upscaler regenerates the frame and invents plausible new detail, which produces a sharper and richer result but can alter what was there. FLUX Video Upscale offers both behaviors in one endpoint through the creativity parameter, so you do not have to switch tools.

Source clips are limited to 20 seconds and 50 MB. Sources longer than 20 seconds are rejected before processing, so they are not truncated and no charge applies.

FLUX Video Upscale is billed per megapixel-second of delivered output, calculated from the output's actual frame dimensions and duration. One megapixel is 1,048,576 pixels, the same definition as FLUX image pricing. Charges are based on output only: input resolution, upscale factor and optional prompts are not charged separately, and rejected clips are not charged. Current rates for both modes are on the Black Forest Labs pricing page.

Yes. It accepts a video at any starting resolution, so you can point it at existing footage to remaster it. It is tuned for FLUX 3 Video output and already runs as the 1080p step in that pipeline, which is where it performs best. Start from the least compressed source you have, since compression artifacts limit how much real detail can be recovered.

Yes. The output keeps the source clip's audio track. Audio is not re-generated and is not charged separately, since billing is on the delivered video output only.

It repairs the imperfections that become more visible as resolution increases, including smudged or soft faces and the gridded artifacts that appear on textures such as water and grass. It is designed to retain FLUX 3's style diversity, natural motion and realism at higher resolutions.