FLUX 3 Max Image to Video API

blackforestlabs/flux-3-max/image-to-video

720p / 1080p · 5–20 sec

FLUX 3 Max Image to Video animates a start image into a 5–20 second 720p or 1080p clip with native audio, optionally landing on an end frame you supply. It keeps the composition, subject and palette of your images while adding the motion and sound in the prompt.

Input

Prompt394

Image Urls

Drag and drop files, paste from clipboard, or provide a URL. Required. Add 1–2 JPEG, PNG or WebP images in order: start frame, then an optional end frame.

2/2 files added

Duration

Resolution

Aspect Ratio

Sound

OutputExample

Continue with

FLUX 3 Max Text to Video FLUX 3 Max Keyframes to Video FLUX 3 First Last Frame to Video

REST API

Quick Start

Make your first FLUX 3 Max Image to Video request in three steps. The example sends a start and end frame for a 6-second clip and returns a task_id.

Connect to the Vidgo API

Create an API key, keep it on your server, and send it in the Authorization header as a Bearer token.

Endpoint: POSThttps://api.vidgo.ai/api/generate/submit
Authentication: Authorization: Bearer VIDGO_API_KEY

Submit one generation task

Run the short example with a prompt and at least one image URL in image_urls.

Submit request

curl --request POST \
  --url "https://api.vidgo.ai/api/generate/submit" \
  --header "Authorization: Bearer $VIDGO_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "blackforestlabs/flux-3-max/image-to-video",
  "input": {
    "prompt": "Start on the closed ceramic teapot from the first image. Steam begins to curl from the spout, the lid lifts slightly and settles, and the camera pushes in slowly until it holds on the poured cup shown in the second image. Warm kitchen window light throughout, shallow depth of field. Native audio: quiet kettle hiss, a soft clink of porcelain, distant birdsong. No text, no logos, no watermark.",
    "image_urls": [
      "https://cdn.vidgo.ai/apis/models/blackforestlabs/flux-3-max/image-to-video/v1/01/input-start-frame.webp",
      "https://cdn.vidgo.ai/apis/models/blackforestlabs/flux-3-max/image-to-video/v1/01/input-end-frame.webp"
    ],
    "duration": 6,
    "resolution": "720p",
    "aspect_ratio": "auto",
    "sound": true
  }
}'

Wait for the result

Use the returned task_id to check the same task until it reaches finished or failed. On success, read data.files[].file_url.

Track status

GET https://api.vidgo.ai/api/generate/status/{task_id}

Poll every few seconds while the status is not_started or running, and stop on finished or failed. On success, read data.files[].file_url. For longer clips, lengthen the interval gradually or add callback_url to the submit request.

not_startedrunningfinishedfailed

Submit response

{
  "code": 200,
  "data": {
    "task_id": "IB2OH450L0Z585RW",
    "status": "not_started",
    "created_time": "2026-11-05T07:04:45"
  }
}

Finished response

{
  "code": 200,
  "data": {
    "task_id": "IB2OH450L0Z585RW",
    "status": "finished",
    "files": [
      {
        "file_url": "https://cdn.vidgo.ai/apis/models/blackforestlabs/flux-3-max/image-to-video/v2/01/output-01.mp4",
        "file_type": "video"
      }
    ],
    "created_time": "2026-11-05T07:04:45",
    "error_message": null,
    "progress": 100
  }
}

Complete runnable example

Open this after the three-step flow is clear. It combines submission, polling, terminal-state handling and result extraction in one script.

Complete runnable example

set -euo pipefail
: "${VIDGO_API_KEY:?Set VIDGO_API_KEY in your environment}"

REQUEST_BODY=$(cat <<'JSON'
{
  "model": "blackforestlabs/flux-3-max/image-to-video",
  "input": {
    "prompt": "Start on the closed ceramic teapot from the first image. Steam begins to curl from the spout, the lid lifts slightly and settles, and the camera pushes in slowly until it holds on the poured cup shown in the second image. Warm kitchen window light throughout, shallow depth of field. Native audio: quiet kettle hiss, a soft clink of porcelain, distant birdsong. No text, no logos, no watermark.",
    "image_urls": [
      "https://cdn.vidgo.ai/apis/models/blackforestlabs/flux-3-max/image-to-video/v1/01/input-start-frame.webp",
      "https://cdn.vidgo.ai/apis/models/blackforestlabs/flux-3-max/image-to-video/v1/01/input-end-frame.webp"
    ],
    "duration": 6,
    "resolution": "720p",
    "aspect_ratio": "auto",
    "sound": true
  }
}
JSON
)

SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  --request POST \
  --url "https://api.vidgo.ai/api/generate/submit" \
  --header "Authorization: Bearer $VIDGO_API_KEY" \
  --header "Content-Type: application/json" \
  --data "$REQUEST_BODY")

TASK_ID=$(printf '%s' "$SUBMIT_RESPONSE" | jq -r '.data.task_id // .task_id // empty')
if [ -z "$TASK_ID" ]; then
  printf 'Submit response did not include task_id:
%s
' "$SUBMIT_RESPONSE" >&2
  exit 1
fi

while true; do
  STATUS_RESPONSE=$(curl --silent --show-error --fail-with-body \
    --url "https://api.vidgo.ai/api/generate/status/$TASK_ID" \
    --header "Authorization: Bearer $VIDGO_API_KEY")
  STATUS=$(printf '%s' "$STATUS_RESPONSE" | jq -r '.data.status // .status // empty')

  case "$STATUS" in
    finished)
      printf '%s' "$STATUS_RESPONSE" | jq -r '(.data.files // .files // [])[]?.file_url'
      break
      ;;
    failed)
      printf '%s' "$STATUS_RESPONSE" | jq -r '.data.error_message // .error_message // "Generation failed"' >&2
      exit 1
      ;;
    not_started|running)
      sleep 2
      ;;
    *)
      printf 'Unexpected task status: %s
' "$STATUS" >&2
      exit 1
      ;;
  esac
done

Request Parameters

model and callback_url belong at the request root; generation parameters belong inside input.

Field	Type	Required	Default	Description
model	string	Yes	—	Fixed to blackforestlabs/flux-3-max/image-to-video.
callback_url	string (URL)	No	—	A public HTTP(S) URL that receives the task result when it finishes.
input	object	Yes	—	Generation parameters: a prompt and 1–2 images, plus optional duration, resolution, aspect_ratio and sound.
input.prompt	string	Yes	—	Text prompt for the shot, including audio cues when sound is on.
input.image_urls	string[]	Yes	—	1–2 URLs: [start_frame] or [start_frame, end_frame].
input.duration	integer	No	5	Whole seconds, 5–20.
input.resolution	string	No	720p	720p or 1080p.
input.aspect_ratio	string	No	auto	auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16.
input.sound	boolean	No	true	Native audio on or off; does not change the price.

Response Fields

Submission returns the task identity immediately. Status responses add progress, output files or a failure message as the task advances.

Field	Type	Description
code	integer	Application result code. Successful responses use 0 or 200.
message	string	Human-readable response or error message when present.
data.task_id	string	Task identifier used in the status endpoint path.
data.status	string	Current state: not_started, running, finished or failed.
data.created_time	string	Task creation time in date-time format.
data.progress	number	Completion percentage when the provider reports progress.
data.files[]	array	Generated output files returned after a successful task.
data.files[].file_url	string	Public URL of the generated video.
data.files[].file_type	string	Generated file type, such as video.
data.files[].watermark_url	string \| null	Watermarked output URL when one is available.
data.error_message	string \| null	Failure detail when status is failed.

Task Lifecycle

Treat not_started and running as non-terminal states. finished and failed are terminal; stop polling when either is returned.

not_started
The task has been accepted and is queued to start.
running
The video is being generated. Keep polling the status endpoint.
finished
The task is complete. Read the video URL from data.files[].file_url.
failed
Generation failed. Read data.error_message for details and stop polling.

Polling and Errors

Authentication401 means the Bearer API key is missing or invalid. Check your key in the dashboard before retrying.
Validation400 means a request field is invalid or belongs to another endpoint. Check image_urls (1–2 public URLs) and duration.
Polling intervalPoll every few seconds while the task runs, and lengthen the interval gradually for longer clips.
Terminal statesPoll only while the status is not_started or running. Stop on finished or failed.
Callback optionAdd callback_url at the request root to receive the final result without continuous polling.

Model Specifications

Specification	Value	Description
Model	blackforestlabs/flux-3-max/image-to-video	Model identifier for asynchronous image-to-video generation with an optional end frame.
Duration	5–20	Whole seconds; defaults to 5.
Resolution	720p \| 1080p	Defaults to 720p.
Aspect ratio	auto \| 21:9 \| 2:1 \| 16:9 \| 4:3 \| 1:1 \| 3:4 \| 9:16	Defaults to auto.
Pricing	34 / 58 credits/s	720p / 1080p, per output second; audio is included.

View the FLUX 3 Max Image to Video API documentation

FLUX 3 Max Image to Video

FLUX 3 Max, post-trained by fal with Black Forest Labs on the FLUX 3 video base, uses your image as the opening frame of the clip. Add a second image and the model plans the motion between the two, which makes reveals, transformations and product transitions predictable. Output runs 5–20 seconds at 720p or 1080p with an audio track, and auto framing follows the start image.

Why choose the FLUX 3 Max Image to Video API?

Start and end frame in one fieldSend one image to animate it, or two to define where the shot begins and ends.
Framing follows your imageWith aspect_ratio set to auto, the output matches the start image, so layouts prepared for a platform stay intact.
Sound that matches the motionAudio is generated with the picture, so pours, footsteps or ambience described in the prompt arrive in sync.
Same rate as text promptsImages add no surcharge: 34 credits per second at 720p and 58 at 1080p.

Parameters

Parameter	Requirement	Description
prompt	Required	Describe the subject, action, camera movement, lighting and the sound you want. Leading and trailing spaces are trimmed; the text must not be empty. Default`—`
image_urls	Required	1–2 public HTTP(S) image URLs. The first image is the start frame; an optional second image is the end frame the clip lands on. Default`—`
duration	Optional	Output length in whole seconds, from 5 to 20. Default`5`
resolution	Optional	720p or 1080p. The resolution sets the per-second rate. Default`720p`
aspect_ratio	Optional	auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4 or 9:16. auto follows the start image. Default`auto`
sound	Optional	Generate a native audio track in the same pass. Set false for silent footage; the price stays the same. Default`true`

How to Use

Prepare the framesUse a clear start image; add an end image with the same framing when you want a fixed landing point.
Describe the changeWrite the action and camera movement that lead from the first image to the second, plus the sounds involved.
Set length and resolutionChoose 5–20 seconds and 720p or 1080p; keep aspect_ratio on auto to follow the start image.
Submit and collect the videoSend image_urls in order with the prompt, then poll with the task_id or wait for callback_url.

Usage and billing

FLUX 3 Max Image to Video is billed per output second at the selected resolution. Input images and sound are included.

Usage	Rate	Details
720p	34 credits / second	$0.17 / second. A 5-second clip costs 170 credits ($0.85); 20 seconds costs 680 credits ($3.40).
1080p	58 credits / second	$0.29 / second. A 10-second clip costs 580 credits ($2.90); 20 seconds costs 1,160 credits ($5.80).

Best Use Cases

Product revealsMove from a packaged product to the product in use with a start and end frame.
Bringing stills to lifeAdd drifting light, steam or a slow camera push to photography and key art.
Before-and-after transitionsShow a room, outfit or landscape changing from one state to another.
Storyboard frame animationAnimate approved storyboard panels while keeping their composition.

Pro Tips

Keep the camera position similar in the start and end images so the model has a clear path between them.
Describe what changes between the frames, not what is already visible in them.
Use 6–10 seconds for a single transformation; longer durations suit slower, continuous moves.
Upload JPEG, PNG or WebP images; public URLs must be reachable without login.

Notes

image_urls takes 1–2 public HTTP(S) URLs in order: start frame, then optional end frame.
With auto, the output follows the start image's aspect ratio; pick a fixed ratio to crop for a specific format.
Credits are duration × the resolution rate and are reserved when the task is submitted.

Related Models

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FLUX 3 Max Image to Video API FAQ

What is the FLUX 3 Max Image to Video API?

FLUX 3 Max Image to Video is a video model post-trained by fal in collaboration with Black Forest Labs for animating still images. It turns a start image, and optionally an end image, into a 5–20 second 720p or 1080p clip with native audio. Built on the FLUX 3 video base, it keeps the subject, composition and palette of your frames while adding the motion and sound you describe. You can call it programmatically or try it from the playground above.

How do start and end frames work in FLUX 3 Max Image to Video?

Put the URLs in image_urls in order. The first image opens the clip; a second image becomes the frame the clip ends on, and the prompt describes the movement between them.

What aspect ratio does FLUX 3 Max Image to Video output?

With aspect_ratio set to auto, the output follows the start image. You can also choose 21:9, 2:1, 16:9, 4:3, 1:1, 3:4 or 9:16 to target a specific format.

Which image files work with FLUX 3 Max Image to Video?

Use public HTTP(S) URLs to PNG, JPEG or WebP images. The playground uploads local files up to 30 MB and inserts their URLs for you.

Does FLUX 3 Max Image to Video add sound to my image?

Yes. sound defaults to true, and the model generates audio that follows the motion and the sounds named in your prompt. Set sound to false for silent output at the same price.

How much does FLUX 3 Max Image to Video cost?

It costs 34 credits ($0.17) per output second at 720p and 58 credits ($0.29) at 1080p. A 6-second 720p clip with a start and end frame is 204 credits.

When should I use FLUX 3 Max Keyframes to Video instead of Image to Video?

Image to Video fixes the first and, optionally, the last frame. Choose Keyframes to Video when you need three or more images, or images pinned to specific moments in the middle of the clip.