Vidu Start End to Video | Image to Video

fal-ai/vidu/q1/start-end-to-video

Vidu Q1 Start-End to Video generates smooth transition 1080p videos between specified start and end images.

Inference

Commercial use

Partner

Schema

LLMs

Playground API

About

Vidu Q1 Start-End to Video API: Generate a smooth transition video between start and end frames using the Q1 model.

1. Calling the API#

Install the client#

The client provides a convenient way to interact with the model API.

npm install --save @fal-ai/client

Migrate to @fal-ai/client

The @fal-ai/serverless-client package has been deprecated in favor of @fal-ai/client. Please check the migration guide for more information.

Setup your API Key#

Set FAL_KEY as an environment variable in your runtime.

export FAL_KEY="YOUR_API_KEY"

Submit a request#

The client API handles the API submit protocol. It will handle the request status updates and return the result when the request is completed.

import { fal } from "@fal-ai/client";

const result = await fal.subscribe("fal-ai/vidu/q1/start-end-to-video", {
  input: {
    prompt: "Dragon lands on a rock",
    start_image_url: "https://v3.fal.media/files/zebra/sgsdKvPigPhJ1S7Hl5bWc_first_frame_q1.png",
    end_image_url: "https://v3.fal.media/files/kangaroo/CASBu_OmOnZ8IafirarFL_last_frame_q1.png"
  },
  logs: true,
  onQueueUpdate: (update) => {
    if (update.status === "IN_PROGRESS") {
      update.logs.map((log) => log.message).forEach(console.log);
    }
  },
});
console.log(result.data);
console.log(result.requestId);

2. Authentication#

The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.

API Key#

In case your app is running in an environment where you cannot set environment variables, you can set the API Key manually as a client configuration.

import { fal } from "@fal-ai/client";

fal.config({
  credentials: "YOUR_FAL_KEY"
});

Protect your API Key

When running code on the client-side (e.g. in a browser, mobile app or GUI applications), make sure to not expose your FAL_KEY. Instead, use a server-side proxy to make requests to the API. For more information, check out our server-side integration guide.

3. Queue#

Long-running requests

For long-running requests, such as training jobs or models with slower inference times, it is recommended to check the Queue status and rely on Webhooks instead of blocking while waiting for the result.

Submit a request#

The client API provides a convenient way to submit requests to the model.

import { fal } from "@fal-ai/client";

const { request_id } = await fal.queue.submit("fal-ai/vidu/q1/start-end-to-video", {
  input: {
    prompt: "Dragon lands on a rock",
    start_image_url: "https://v3.fal.media/files/zebra/sgsdKvPigPhJ1S7Hl5bWc_first_frame_q1.png",
    end_image_url: "https://v3.fal.media/files/kangaroo/CASBu_OmOnZ8IafirarFL_last_frame_q1.png"
  },
  webhookUrl: "https://optional.webhook.url/for/results",
});

Fetch request status#

You can fetch the status of a request to check if it is completed or still in progress.

import { fal } from "@fal-ai/client";

const status = await fal.queue.status("fal-ai/vidu/q1/start-end-to-video", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
  logs: true,
});

Get the result#

Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.

import { fal } from "@fal-ai/client";

const result = await fal.queue.result("fal-ai/vidu/q1/start-end-to-video", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);

4. Files#

Some attributes in the API accept file URLs as input. Whenever that's the case you can pass your own URL or a Base64 data URI.

Data URI (base64)#

You can pass a Base64 data URI as a file input. The API will handle the file decoding for you. Keep in mind that for large files, this alternative although convenient can impact the request performance.

Hosted files (URL)#

You can also pass your own URLs as long as they are publicly accessible. Be aware that some hosts might block cross-site requests, rate-limit, or consider the request as a bot.

Uploading files#

We provide a convenient file storage that allows you to upload files and use them in your requests. You can upload files using the client API and use the returned URL in your requests.

import { fal } from "@fal-ai/client";

const file = new File(["Hello, World!"], "hello.txt", { type: "text/plain" });
const url = await fal.storage.upload(file);

Auto uploads

The client will auto-upload the file for you if you pass a binary object (e.g. File, Data).

Read more about file handling in our file upload guide.

5. Schema#

Input#

prompt string* required

Text prompt for video generation, max 1500 characters

start_image_url string* required

URL of the image to use as the first frame

end_image_url string* required

URL of the image to use as the last frame

seed integer

Seed for the random number generator

movement_amplitude MovementAmplitudeEnum

The movement amplitude of objects in the frame Default value: "auto"

Possible enum values: auto, small, medium, large

{
  "prompt": "Dragon lands on a rock",
  "start_image_url": "https://v3.fal.media/files/zebra/sgsdKvPigPhJ1S7Hl5bWc_first_frame_q1.png",
  "end_image_url": "https://v3.fal.media/files/kangaroo/CASBu_OmOnZ8IafirarFL_last_frame_q1.png",
  "movement_amplitude": "auto"
}

Output#

video File* required

The generated transition video between start and end frames using the Q1 model

{
  "video": {
    "url": "https://fal.media/files/zebra/-ACpJE6m4JQSBCCeNB51S_output.mp4"
  }
}

Other types#

Q2TextToVideoRequest#

prompt string* required

Text prompt for video generation, max 3000 characters

seed integer

Random seed for generation. Use -1 for random seed

duration DurationEnum

Duration of the video in seconds Default value: "4"

Possible enum values: 2, 3, 4, 5, 6, 7, 8

resolution ResolutionEnum

Output video resolution Default value: "720p"

Possible enum values: 360p, 520p, 720p, 1080p

aspect_ratio AspectRatioEnum

The aspect ratio of the output video Default value: "16:9"

Possible enum values: 16:9, 9:16, 1:1

movement_amplitude MovementAmplitudeEnum

The movement amplitude of objects in the frame Default value: "auto"

Possible enum values: auto, small, medium, large

bgm boolean

Whether to add background music to the video (only for 4-second videos)

Q2VideoExtensionRequest#

video_url string* required

URL of the video to extend

prompt string

text prompt to guide the video extension

seed integer

Random seed for generation. Use -1 for random seed

duration DurationEnum

Duration of the extension in seconds Default value: "4"

Possible enum values: 2, 3, 4, 5, 6, 7

resolution ResolutionEnum

Output video resolution Default value: "720p"

Possible enum values: 720p, 1080p

mode ModeEnum

Generation mode: turbo for faster generation, pro for higher quality Default value: "turbo"

Possible enum values: turbo, pro

Image#

url string* required

The URL where the file can be downloaded from.

content_type string

The mime type of the file.

file_name string

The name of the file. It will be auto-generated if not provided.

file_size integer

The size of the file in bytes.

file_data string

File data

width integer

The width of the image in pixels.

height integer

The height of the image in pixels.

ImageToVideoRequest#

prompt string* required

Text prompt for video generation, max 1500 characters

image_url string* required

URL of the image to use as the first frame

seed integer

Random seed for generation

movement_amplitude MovementAmplitudeEnum

The movement amplitude of objects in the frame Default value: "auto"

Possible enum values: auto, small, medium, large

File#

url string* required

The URL where the file can be downloaded from.

content_type string

The mime type of the file.

file_name string

The name of the file. It will be auto-generated if not provided.

file_size integer

The size of the file in bytes.

file_data string

File data

ReferenceToVideoRequest#

prompt string* required

Text prompt for video generation, max 1500 characters

reference_image_urls list<string>* required

URLs of the reference images to use for consistent subject appearance

seed integer

Random seed for generation

aspect_ratio AspectRatioEnum

The aspect ratio of the output video Default value: "16:9"

Possible enum values: 16:9, 9:16, 1:1

movement_amplitude MovementAmplitudeEnum

The movement amplitude of objects in the frame Default value: "auto"

Possible enum values: auto, small, medium, large

Q1ImageToVideoRequest#

prompt string* required

Text prompt for video generation, max 1500 characters

image_url string* required

URL of the image to use as the first frame

seed integer

Seed for the random number generator

movement_amplitude MovementAmplitudeEnum

The movement amplitude of objects in the frame Default value: "auto"

Possible enum values: auto, small, medium, large

Q2ReferenceToVideoRequest#

prompt string* required

Text prompt for video generation, max 3000 characters

reference_image_urls list<string>* required

URLs of the reference images to use for consistent subject appearance (up to 7 images)

seed integer

Random seed for generation. Use -1 for random seed

duration DurationEnum

Duration of the video in seconds Default value: "4"

Possible enum values: 1, 2, 3, 4, 5, 6, 7, 8

resolution ResolutionEnum

Output video resolution Default value: "720p"

Possible enum values: 360p, 520p, 720p, 1080p

aspect_ratio AspectRatioEnum

The aspect ratio of the output video Default value: "16:9"

Possible enum values: 16:9, 9:16, 1:1

movement_amplitude MovementAmplitudeEnum

The movement amplitude of objects in the frame Default value: "auto"

Possible enum values: auto, small, medium, large

bgm boolean

Whether to add background music to the video (only for 4-second videos)

ReferenceToImageRequest#

prompt string* required

Text prompt for video generation, max 1500 characters

reference_image_urls list<string>* required

URLs of the reference images to use for consistent subject appearance

aspect_ratio AspectRatioEnum

The aspect ratio of the output video Default value: "16:9"

Possible enum values: 16:9, 9:16, 1:1

seed integer

Random seed for generation

StartEndToVideoRequest#

prompt string* required

Text prompt for video generation, max 1500 characters

start_image_url string* required

URL of the image to use as the first frame

end_image_url string* required

URL of the image to use as the last frame

seed integer

Random seed for generation

movement_amplitude MovementAmplitudeEnum

The movement amplitude of objects in the frame Default value: "auto"

Possible enum values: auto, small, medium, large

Q1ReferenceToVideoRequest#

prompt string* required

Text prompt for video generation, max 1500 characters

reference_image_urls list<string>* required

URLs of the reference images to use for consistent subject appearance. Q1 model supports up to 7 reference images.

seed integer

Random seed for generation

aspect_ratio AspectRatioEnum

The aspect ratio of the output video Default value: "16:9"

Possible enum values: 16:9, 9:16, 1:1

movement_amplitude MovementAmplitudeEnum

The movement amplitude of objects in the frame Default value: "auto"

Possible enum values: auto, small, medium, large

bgm boolean

Whether to add background music to the generated video

TemplateToVideoRequest#

template TemplateEnum

AI video template to use. Pricing varies by template: Standard templates (hug, kiss, love_pose, etc.) cost 4 credits ($0.20), Premium templates (lunar_newyear, dynasty_dress, dreamy_wedding, etc.) cost 6 credits ($0.30), and Advanced templates (live_photo) cost 10 credits ($0.50). Default value: "hug"

Possible enum values: dreamy_wedding, romantic_lift, sweet_proposal, couple_arrival, cupid_arrow, pet_lovers, lunar_newyear, hug, kiss, dynasty_dress, wish_sender, love_pose, hair_swap, youth_rewind, morphlab, live_photo, emotionlab, live_memory, interaction, christmas, pet_finger, eat_mushrooms, beast_chase_library, beast_chase_supermarket, petal_scattered, emoji_figure, hair_color_change, multiple_people_kissing, beast_chase_amazon, beast_chase_mountain, balloonman_explodes_pro, get_thinner, jump2pool, bodyshake, jiggle_up, shake_it_dance, subject_3, pubg_winner_hit, shake_it_down, blueprint_supreme, hip_twist, motor_dance, rat_dance, kwok_dance, leg_sweep_dance, heeseung_march, shake_to_max, dame_un_grrr, i_know, lit_bounce, wave_dance, chill_dance, hip_flicking, sakura_season, zongzi_wrap, zongzi_drop, dragonboat_shot, rain_kiss, child_memory, couple_drop, couple_walk, flower_receive, love_drop, cheek_kiss, carry_me, blow_kiss, love_fall, french_kiss_8s, workday_feels, love_story, bloom_magic, ghibli, minecraft, box_me, claw_me, clayshot, manga_meme, quad_meme, pixel_me, clayshot_duo, irasutoya, american_comic, simpsons_comic, yayoi_kusama_style, pop_art, jojo_style, slice_therapy, balloon_flyaway, flying, paperman, pinch, bloom_doorobear, gender_swap, nap_me, sexy_me, spin360, smooth_shift, paper_fall, jump_to_cloud, pilot, sweet_dreams, soul_depart, punch_hit, watermelon_hit, split_stance_pet, make_face, break_glass, split_stance_human, covered_liquid_metal, fluffy_plunge, pet_belly_dance, water_float, relax_cut, head_to_balloon, cloning, across_the_universe_jungle, clothes_spinning_remnant, across_the_universe_jurassic, across_the_universe_moon, fisheye_pet, hitchcock_zoom, cute_bangs, earth_zoom_out, fisheye_human, drive_yacht, virtual_singer, earth_zoom_in, aliens_coming, drive_ferrari, bjd_style, virtual_fitting, orbit, zoom_in, ai_outfit, spin180, orbit_dolly, orbit_dolly_fast, auto_spin, walk_forward, outfit_show, zoom_in_fast, zoom_out_image, zoom_out_startend, muscling, captain_america, hulk, cap_walk, hulk_dive, exotic_princess, beast_companion, cartoon_doll, golden_epoch, oscar_gala, fashion_stride, star_carpet, flame_carpet, frost_carpet, mecha_x, style_me, tap_me, saber_warrior, pet2human, graduation, fishermen, happy_birthday, fairy_me, ladudu_me, ladudu_me_random, squid_game, superman, grow_wings, clevage, fly_with_doraemon, creatice_product_down, pole_dance, hug_from_behind, creatice_product_up_cybercity, creatice_product_up_bluecircuit, creatice_product_up, run_fast, background_explosion

input_image_urls list<string>* required

URLs of the images to use with the template. Number of images required varies by template: 'dynasty_dress' and 'shop_frame' accept 1-2 images, 'wish_sender' requires exactly 3 images, all other templates accept only 1 image.

seed integer

Random seed for generation

aspect_ratio AspectRatioEnum

The aspect ratio of the output video Default value: "16:9"

Possible enum values: 16:9, 9:16

Q1TextToVideoRequest#

prompt string* required

Text prompt for video generation, max 1500 characters

style StyleEnum

The style of output video Default value: "general"

Possible enum values: general, anime

seed integer

Seed for the random number generator

aspect_ratio AspectRatioEnum

The aspect ratio of the output video Default value: "16:9"

Possible enum values: 16:9, 9:16, 1:1

movement_amplitude MovementAmplitudeEnum

The movement amplitude of objects in the frame Default value: "auto"

Possible enum values: auto, small, medium, large

Q2ImageToVideoRequest#

prompt string* required

Text prompt for video generation, max 3000 characters

image_url string* required

URL of the image to use as the starting frame

seed integer

Random seed for generation. Use -1 for random seed

duration DurationEnum

Duration of the video in seconds Default value: "4"

Possible enum values: 2, 3, 4, 5, 6, 7, 8

resolution ResolutionEnum

Output video resolution Default value: "720p"

Possible enum values: 720p, 1080p

movement_amplitude MovementAmplitudeEnum

The movement amplitude of objects in the frame Default value: "auto"

Possible enum values: auto, small, medium, large

mode ModeEnum

Generation mode: turbo for faster generation, pro for higher quality Default value: "turbo"

Possible enum values: turbo, pro

bgm boolean

Whether to add background music to the video (only for 4-second videos)

Vidu Start End to Video Image to Video

Table of contents

1. Calling the API

2. Authentication

3. Queue

4. Files

5. Schema

About

1. Calling the API#

Install the client#

Migrate to @fal-ai/client

Setup your API Key#

Submit a request#

2. Authentication#

API Key#

Protect your API Key

3. Queue#

Long-running requests

Submit a request#

Fetch request status#

Get the result#

4. Files#

Data URI (base64)#

Hosted files (URL)#

Uploading files#

Auto uploads

5. Schema#

Input#

Output#

Other types#

Q2TextToVideoRequest#

Q2VideoExtensionRequest#

Image#

ImageToVideoRequest#

File#

ReferenceToVideoRequest#

Q1ImageToVideoRequest#

Q2ReferenceToVideoRequest#

ReferenceToImageRequest#

StartEndToVideoRequest#

Q1ReferenceToVideoRequest#

TemplateToVideoRequest#

Q1TextToVideoRequest#

Q2ImageToVideoRequest#

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