CogVideoX-5B | Video to Video

fal-ai/cogvideox-5b/video-to-video

Generate videos from videos and prompts using CogVideoX-5B

Inference

Commercial use

Schema

LLMs

Playground API Examples

About

Video to video generation using CogVideoX-5B.

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/cogvideox-5b/video-to-video", {
  input: {
    prompt: "An astronaut stands triumphantly at the peak of a towering mountain. Panorama of rugged peaks and valleys. Very futuristic vibe and animated aesthetic. Highlights of purple and golden colors in the scene. The sky is looks like an animated/cartoonish dream of galaxies, nebulae, stars, planets, moons, but the remainder of the scene is mostly realistic. ",
    video_url: "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/hiker.mp4"
  },
  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/cogvideox-5b/video-to-video", {
  input: {
    prompt: "An astronaut stands triumphantly at the peak of a towering mountain. Panorama of rugged peaks and valleys. Very futuristic vibe and animated aesthetic. Highlights of purple and golden colors in the scene. The sky is looks like an animated/cartoonish dream of galaxies, nebulae, stars, planets, moons, but the remainder of the scene is mostly realistic. ",
    video_url: "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/hiker.mp4"
  },
  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/cogvideox-5b/video-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/cogvideox-5b/video-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

The prompt to generate the video from.

video_size ImageSize | Enum

The size of the generated video.

Possible enum values: square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9

Note: For custom image sizes, you can pass the width and height as an object:

"image_size": {
  "width": 1280,
  "height": 720
}

negative_prompt string

The negative prompt to generate video from Default value: ""

loras list<LoraWeight>

The LoRAs to use for the image generation. We currently support one lora.

num_inference_steps integer

The number of inference steps to perform. Default value: 50

seed integer

The same seed and the same prompt given to the same version of the model will output the same video every time.

guidance_scale float

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt when looking for a related video to show you. Default value: 7

use_rife boolean

Use RIFE for video interpolation Default value: true

export_fps integer

The target FPS of the video Default value: 16

video_url string* required

The video to generate the video from.

strength float

The strength to use for Video to Video. 1.0 completely remakes the video while 0.0 preserves the original. Default value: 0.8

{
  "prompt": "An astronaut stands triumphantly at the peak of a towering mountain. Panorama of rugged peaks and valleys. Very futuristic vibe and animated aesthetic. Highlights of purple and golden colors in the scene. The sky is looks like an animated/cartoonish dream of galaxies, nebulae, stars, planets, moons, but the remainder of the scene is mostly realistic. ",
  "video_size": {
    "height": 480,
    "width": 720
  },
  "negative_prompt": "Distorted, discontinuous, Ugly, blurry, low resolution, motionless, static, disfigured, disconnected limbs, Ugly faces, incomplete arms",
  "num_inference_steps": 50,
  "guidance_scale": 7,
  "use_rife": true,
  "export_fps": 16,
  "video_url": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/hiker.mp4",
  "strength": 0.8
}

Output#

video File* required

The URL to the generated video

timings Timings* required

seed integer* required

Seed of the generated video. It will be the same value of the one passed in the input or the randomly generated that was used in case none was passed.

prompt string* required

The prompt used for generating the video.

{
  "video": {
    "url": "",
    "content_type": "image/png",
    "file_name": "z9RV14K95DvU.png",
    "file_size": 4404019
  },
  "prompt": ""
}

Other types#

ImageSize#

width integer

The width of the generated image. Default value: 512

height integer

The height of the generated image. Default value: 512

LoraWeight#

path string* required

URL or the path to the LoRA weights.

scale float

The scale of the LoRA weight. This is used to scale the LoRA weight before merging it with the base model. Default value: 1

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

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#

ImageSize#

LoraWeight#

File#

Related Models

CogVideoX-5B Video 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#

ImageSize#

LoraWeight#

File#

Related Models