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Kling 1.0 Text to Video

fal-ai/kling-video/v1/standard/text-to-video
Generate video clips from your prompts using Kling 1.0
Inference
Commercial use
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About

Kling 1.0 Text to Video API.

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

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/kling-video/v1/standard/text-to-video", {
  input: {
    prompt: "A stylish woman walks down a Tokyo street filled with warm glowing neon and animated city signage. She wears a black leather jacket, a long red dress, and black boots, and carries a black purse."
  },
  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"
});

3. Queue#

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/kling-video/v1/standard/text-to-video", {
  input: {
    prompt: "A stylish woman walks down a Tokyo street filled with warm glowing neon and animated city signage. She wears a black leather jacket, a long red dress, and black boots, and carries a black purse."
  },
  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/kling-video/v1/standard/text-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/kling-video/v1/standard/text-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);

Read more about file handling in our file upload guide.

5. Schema#

Input#

prompt string* required
duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

aspect_ratio AspectRatioEnum

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

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

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

camera_control CameraControlEnum

Camera control parameters

Possible enum values: down_back, forward_up, right_turn_forward, left_turn_forward

advanced_camera_control CameraControl

Advanced Camera control parameters

{
  "prompt": "A stylish woman walks down a Tokyo street filled with warm glowing neon and animated city signage. She wears a black leather jacket, a long red dress, and black boots, and carries a black purse.",
  "duration": "5",
  "aspect_ratio": "16:9",
  "negative_prompt": "blur, distort, and low quality",
  "cfg_scale": 0.5
}

Output#

video File* required

The generated video

{
  "video": {
    "url": "https://v2.fal.media/files/fb33a862b94d4d7195e610e4cbc5d392_output.mp4"
  }
}

Other types#

TextToVideoV21MasterRequest#

prompt string* required
duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

aspect_ratio AspectRatioEnum

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

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

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

LipsyncA2VRequest#

video_url string* required

The URL of the video to generate the lip sync for. Supports .mp4/.mov, ≤100MB, 2–10s, 720p/1080p only, width/height 720–1920px.

audio_url string* required

The URL of the audio to generate the lip sync for. Minimum duration is 2s and maximum duration is 60s. Maximum file size is 5MB.

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

TextToVideoV25ProRequest#

prompt string* required
duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

aspect_ratio AspectRatioEnum

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

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

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

CameraControl#

movement_type MovementTypeEnum* required

The type of camera movement

Possible enum values: horizontal, vertical, pan, tilt, roll, zoom

movement_value integer* required

The value of the camera movement

ProImageToVideoRequest#

prompt string* required
image_url string* required
duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

aspect_ratio AspectRatioEnum

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

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

tail_image_url string

URL of the image to be used for the end of the video

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

ImageToVideoRequest#

prompt string* required
image_url string* required
duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

ImageToVideoV21StandardRequest#

prompt string* required
image_url string* required

URL of the image to be used for the video

duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

ImageToVideoV25StandardRequest#

prompt string* required
image_url string* required

URL of the image to be used for the video

duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

KlingV15ProImageToVideoRequest#

prompt string* required
image_url string* required
duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

aspect_ratio AspectRatioEnum

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

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

tail_image_url string

URL of the image to be used for the end of the video

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

static_mask_url string

URL of the image for Static Brush Application Area (Mask image created by users using the motion brush)

dynamic_masks list<DynamicMask>

List of dynamic masks

TextToVideoRequest#

prompt string* required
duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

aspect_ratio AspectRatioEnum

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

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

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

DynamicMask#

mask_url string* required

URL of the image for Dynamic Brush Application Area (Mask image created by users using the motion brush)

trajectories list<Trajectory>

List of trajectories

ImageToVideoV25ProRequest#

prompt string* required
image_url string* required

URL of the image to be used for the video

duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

tail_image_url string

URL of the image to be used for the end of the video

VideoEffectsRequest#

input_image_urls list<string>

URL of images to be used for hug, kiss or heart_gesture video.

effect_scene EffectSceneEnum* required

The effect scene to use for the video generation

Possible enum values: hug, kiss, heart_gesture, squish, expansion, fuzzyfuzzy, bloombloom, dizzydizzy, jelly_press, jelly_slice, jelly_squish, jelly_jiggle, pixelpixel, yearbook, instant_film, anime_figure, rocketrocket

duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

MultiImageToVideoRequest#

prompt string* required
input_image_urls list<string>* required

List of image URLs to use for video generation. Supports up to 4 images.

duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

aspect_ratio AspectRatioEnum

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

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

negative_prompt string

Default value: "blur, distort, and low quality"

V1ImageToVideoRequest#

prompt string* required

The prompt for the video

image_url string* required

URL of the image to be used for the video

duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

tail_image_url string

URL of the image to be used for the end of the video

static_mask_url string

URL of the image for Static Brush Application Area (Mask image created by users using the motion brush)

dynamic_masks list<DynamicMask>

List of dynamic masks

LipsyncT2VRequest#

video_url string* required

The URL of the video to generate the lip sync for. Supports .mp4/.mov, ≤100MB, 2-60s, 720p/1080p only, width/height 720–1920px. If validation fails, an error is returned.

text string* required

Text content for lip-sync video generation. Max 120 characters.

voice_id VoiceIdEnum* required

Voice ID to use for speech synthesis

Possible enum values: genshin_vindi2, zhinen_xuesheng, AOT, ai_shatang, genshin_klee2, genshin_kirara, ai_kaiya, oversea_male1, ai_chenjiahao_712, girlfriend_4_speech02, chat1_female_new-3, chat_0407_5-1, cartoon-boy-07, uk_boy1, cartoon-girl-01, PeppaPig_platform, ai_huangzhong_712, ai_huangyaoshi_712, ai_laoguowang_712, chengshu_jiejie, you_pingjing, calm_story1, uk_man2, laopopo_speech02, heainainai_speech02, reader_en_m-v1, commercial_lady_en_f-v1, tiyuxi_xuedi, tiexin_nanyou, girlfriend_1_speech02, girlfriend_2_speech02, zhuxi_speech02, uk_oldman3, dongbeilaotie_speech02, chongqingxiaohuo_speech02, chuanmeizi_speech02, chaoshandashu_speech02, ai_taiwan_man2_speech02, xianzhanggui_speech02, tianjinjiejie_speech02, diyinnansang_DB_CN_M_04-v2, yizhipiannan-v1, guanxiaofang-v2, tianmeixuemei-v1, daopianyansang-v1, mengwa-v1

voice_language VoiceLanguageEnum

The voice language corresponding to the Voice ID Default value: "en"

Possible enum values: zh, en

voice_speed float

Speech rate for Text to Video generation Default value: 1

TextToVideoV2MasterRequest#

prompt string* required
duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

aspect_ratio AspectRatioEnum

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

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

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

ImageToVideoV21ProRequest#

prompt string* required
image_url string* required

URL of the image to be used for the video

duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

tail_image_url string

URL of the image to be used for the end of the video

ImageToVideoV21MasterRequest#

prompt string* required
image_url string* required

URL of the image to be used for the video

duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

FaceChoice#

face_id string* required

ID of the face in the video. Returned by the identify_face API.

audio_url string* required

Publicly accessible URL to the audio file. Supported formats: .mp3, .wav, .m4a (max 5MB). Duration must be between 2–60 seconds.

sound_start_time integer* required

Start time (ms) for cropping the source audio. Must be between 0 and the audio duration. The cropped audio must remain at least 2 seconds long.

sound_end_time integer* required

End time (ms) for cropping the source audio. Must be greater than sound_start_time and within the original audio duration. The cropped segment must be at least 2 seconds long.

sound_insert_time integer* required

Time (ms) at which the cropped audio will be inserted into the video. Must meet both of the following conditions:

  1. sound_insert_time must be within the duration of the video (it cannot be greater than the total video length).
  2. The cropped audio segment must fully fit within the video when inserted — meaning sound_insert_time + cropped_sound_length must not exceed the video's total duration.

In other words: the insert point must be inside the video, and the inserted audio must not extend past the end of the video.

sound_volume float

Volume multiplier for the inserted audio. Range: [0, 2], where 1 = original volume. Default value: 1

original_audio_volume float

Volume multiplier for the video's original audio track. Range: [0, 2]. Has no effect if the source video contains no audio. Default value: 1

FaceData#

face_id string* required

The face id of video. When the same person's face is separated by more than 1 second in the video, it will be considered as different IDs.

face_image string* required

A schematic diagram of a face captured from a video (URL).

start_time integer* required

This face can be used as the starting time of lip-sync (milliseconds).

end_time integer* required

This face can be used as the ending time of lip-sync (milliseconds). Note: This value has a millisecond level error and will be longer than the actual ending time.

Trajectory#

x integer* required

X coordinate of the motion trajectory

y integer* required

Y coordinate of the motion trajectory

ImageToVideoV2MasterRequest#

prompt string* required
image_url string* required

URL of the image to be used for the video

duration DurationEnum

The duration of the generated video in seconds Default value: "5"

Possible enum values: 5, 10

negative_prompt string

Default value: "blur, distort, and low quality"

cfg_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt. Default value: 0.5

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