Generate a video with audio from a text prompt.
The client provides a convenient way to interact with the model API.
npm install --save @fal-ai/clientSet FAL_KEY as an environment variable in your runtime.
export FAL_KEY="YOUR_API_KEY"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("blackforestlabs/flux-3-max/text-to-video", {
input: {
prompt: "A red panda walks along a mossy log in a sunlit forest, pausing to sniff the air before climbing over a fallen branch. Soft morning light filters through the canopy. Ambient birdsong and rustling leaves."
},
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);The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.
import { fal } from "@fal-ai/client";
fal.config({
credentials: "YOUR_FAL_KEY"
});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("blackforestlabs/flux-3-max/text-to-video", {
input: {
prompt: "A red panda walks along a mossy log in a sunlit forest, pausing to sniff the air before climbing over a fallen branch. Soft morning light filters through the canopy. Ambient birdsong and rustling leaves."
},
webhookUrl: "https://optional.webhook.url/for/results",
});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("blackforestlabs/flux-3-max/text-to-video", {
requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
logs: true,
});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("blackforestlabs/flux-3-max/text-to-video", {
requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);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.
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.
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.
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.
prompt string* requiredThe text prompt describing the video you want to generate.
duration DurationEnumDuration of the generated video in seconds. Default value: "5"
Possible enum values: 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
resolution ResolutionEnumResolution of the generated video. 1080p, 2K (1440p) and 4K (2160p) are upscaled from the 720p generation; exact dimensions depend on the aspect ratio. Default value: "720p"
Possible enum values: 720p, 1080p, 2K, 4K
reasoning_level ReasoningLevelEnumHow much effort the harness spends reasoning about the given prompt. Higher reasoning effort means slower generation time. Default value: "high"
Possible enum values: low, high
aspect_ratio AspectRatioEnumAspect ratio of the generated video. auto uses 16:9 for text prompts and follows the first image otherwise. Default value: "auto"
Possible enum values: auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16
generate_audio booleanWhether to generate audio for the video. Default value: true
seed integerThe seed to use for the generation. Random when not provided.
{
"prompt": "A red panda walks along a mossy log in a sunlit forest, pausing to sniff the air before climbing over a fallen branch. Soft morning light filters through the canopy. Ambient birdsong and rustling leaves.",
"duration": 5,
"resolution": "720p",
"reasoning_level": "high",
"aspect_ratio": "auto",
"generate_audio": true
}The generated video.
seed integer* requiredThe seed used for the generation.
inference: seconds the model spent denoising the video. Excludes prompt expansion, decoding and upload.
{
"video": {
"url": "https://v3b.fal.media/files/b/0aad95e5/Yk8T8_MXiLBhuphmPfeqR_alligator.mp4",
"width": 1280,
"duration": 5.041666666666667,
"content_type": "video/mp4",
"num_frames": 121,
"height": 704,
"fps": 24
}
}url string* requiredThe URL where the file can be downloaded from.
content_type stringThe mime type of the file.
file_name stringThe name of the file. It will be auto-generated if not provided.
file_size integerThe size of the file in bytes.
width integerThe width of the video
height integerThe height of the video
fps floatThe FPS of the video
duration floatThe duration of the video
num_frames integerThe number of frames in the video