Vace Video to Video
About
Generate a video from a prompt.
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/wan-vace", {
input: {
prompt: "The video shows a man riding a horse on a vast grassland. He has long lavender hair and wears a traditional dress of a white top and black pants. The animation style makes him look like he is doing some kind of outdoor activity or performing. The background is a spectacular mountain range and cloud sky, giving a sense of tranquility and vastness. The entire video is shot from a fixed angle, focusing on the rider and his horse."
},
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#
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#
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/wan-vace", {
input: {
prompt: "The video shows a man riding a horse on a vast grassland. He has long lavender hair and wears a traditional dress of a white top and black pants. The animation style makes him look like he is doing some kind of outdoor activity or performing. The background is a spectacular mountain range and cloud sky, giving a sense of tranquility and vastness. The entire video is shot from a fixed angle, focusing on the rider and his horse."
},
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/wan-vace", {
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/wan-vace", {
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
* requiredThe text prompt to guide video generation.
negative_prompt
string
Negative prompt for video generation. Default value: "bright colors, overexposed, static, blurred details, subtitles, style, artwork, painting, picture, still, overall gray, worst quality, low quality, JPEG compression residue, ugly, incomplete, extra fingers, poorly drawn hands, poorly drawn faces, deformed, disfigured, malformed limbs, fused fingers, still picture, cluttered background, three legs, many people in the background, walking backwards"
num_frames
integer
Number of frames to generate. Must be between 81 to 100 (inclusive). Default value: 81
frames_per_second
integer
Frames per second of the generated video. Must be between 5 to 24. Default value: 16
task
TaskEnum
Task type for the model. Default value: "depth"
Possible enum values: depth, inpainting
shift
float
Shift parameter for video generation. Default value: 5
seed
integer
Random seed for reproducibility. If None, a random seed is chosen.
resolution
ResolutionEnum
Resolution of the generated video (480p,580p, or 720p). Default value: "720p"
Possible enum values: 480p, 580p, 720p
aspect_ratio
AspectRatioEnum
Aspect ratio of the generated video (16:9 or 9:16). Default value: "16:9"
Possible enum values: auto, 9:16, 16:9
num_inference_steps
integer
Number of inference steps for sampling. Higher values give better quality but take longer. Default value: 30
video_url
string
URL to the source video file. If provided, the model will use this video as a reference.
mask_video_url
string
URL to the source mask file. If provided, the model will use this mask as a reference.
mask_image_url
string
URL to the guiding mask file. If provided, the model will use this mask as a reference to create masked video. If provided mask video url will be ignored.
Urls to source reference image. If provided, the model will use this image as reference.
enable_safety_checker
boolean
If set to true, the safety checker will be enabled.
enable_prompt_expansion
boolean
Whether to enable prompt expansion.
preprocess
boolean
Whether to preprocess the input video.
{
"prompt": "The video shows a man riding a horse on a vast grassland. He has long lavender hair and wears a traditional dress of a white top and black pants. The animation style makes him look like he is doing some kind of outdoor activity or performing. The background is a spectacular mountain range and cloud sky, giving a sense of tranquility and vastness. The entire video is shot from a fixed angle, focusing on the rider and his horse.",
"negative_prompt": "bright colors, overexposed, static, blurred details, subtitles, style, artwork, painting, picture, still, overall gray, worst quality, low quality, JPEG compression residue, ugly, incomplete, extra fingers, poorly drawn hands, poorly drawn faces, deformed, disfigured, malformed limbs, fused fingers, still picture, cluttered background, three legs, many people in the background, walking backwards",
"num_frames": 81,
"frames_per_second": 16,
"task": "depth",
"shift": 5,
"resolution": "720p",
"aspect_ratio": "16:9",
"num_inference_steps": 30,
"video_url": "https://storage.googleapis.com/falserverless/vace/src_video.mp4",
"mask_video_url": "https://storage.googleapis.com/falserverless/vace/src_mask.mp4",
"ref_image_urls": [
"https://storage.googleapis.com/falserverless/vace/src_ref_image_1.png"
],
"enable_safety_checker": true,
"enable_prompt_expansion": true
}
Output#
The generated video file.
seed
integer
* requiredThe seed used for generation.
{
"video": {
"url": "https://storage.googleapis.com/falserverless/vace/out_video_vace.mp4"
}
}
Other types#
File#
url
string
* requiredThe 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