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Black Forest LabsPrompt guide

FLUX 3 Video Prompt Guide

How to write FLUX 3 Video prompts: a structure that works, 4 example prompts for text to video and image to video, and the settings that change the result. Copy any prompt into the Studio to try it.

Example prompts
4
2 tasks
Resolution
720p
720p
Clip length
5–20 s
audio included
Per try from
$0.1425/s
720p
Try in Studio Call the API

Structure

A FLUX 3 Video prompt, piece by piece

Write in this order and keep each part concrete. Physical detail works better than mood words.

  1. 01

    Subject

    Who or what is on screen, with the details that must stay consistent: age, clothing, materials, colours.

  2. 02

    Action

    One clear action in the present tense. For clips up to 20 s, describe a short sequence of beats.

  3. 03

    Camera

    Shot size and movement: close-up, wide, dolly-in, orbit, handheld, drone.

  4. 04

    Scene and light

    Location, time of day, and where the light comes from.

  5. 05

    Style

    Lens, film look, colour grade or animation style.

  6. 06

    Sound

    FLUX 3 Video generates synchronized audio with the clip, so name the ambience, effects or lines of dialogue you want.

Examples

FLUX 3 Video prompt examples

Prompts written for this model, grouped by task. Open one in the Studio, then change one part at a time.

  • Text to Video9:16
    A lighthouse keeper climbs the spiral stairs with a lantern as a storm hits the windows, thunder and rain
    Try in Studio
  • Text to Video16:9
    Twenty-second single take following a skateboarder through a sunlit LA neighborhood, wheels clacking
    Try in Studio
  • Text to Video
    A hot-air balloon drifts over Cappadocia at sunrise, the burner roars, the camera rises alongside the basket
    Try in Studio
  • Image to Video
    Slow push-in as the flower opens from bud to full bloom
    Try in Studio

By task

Prompting each FLUX 3 Video task

Text to Video

Everything comes from the text, so describe subject, action and camera explicitly. Put the most important element first.

Image to Video

The image is the first frame: describe the motion and camera from that frame instead of re-describing the picture. Add a last frame to control where the shot ends.

Settings

Settings that change the result

Set these next to the prompt — in the Studio or as API parameters.

FLUX 3 Video generation settings
SettingOptionsEffect
Aspect ratio
aspect_ratio
16:9 · 9:16 · 1:1 · 4:3 · 3:4 · 21:9 · 2:1
default 16:9
Output image shape.
Duration
duration
5–20s
default 5
Length of the generated clip in seconds (5–20s). You pay per second.
Generate audio
generate_audio
on / off
default true
Generate synchronized sound, ambience and dialogue. No extra cost.

FAQ

FLUX 3 Video prompting questions

There is no separate negative prompt for FLUX 3 Video. Say what you want instead of what you don't, and keep unwanted elements out of the description.

FLUX 3 Video has no seed parameter, so results vary between runs. Generate a few variations and keep the best.

Yes. Audio is generated with the clip at no extra cost, so describe ambience, effects or dialogue in the prompt.

Open FLUX 3 Video in the Studio and paste any prompt from this page. Each run shows its exact price before you generate, and failed generations are refunded.