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Generate audio from a video URL and a prompt. :param input: Input data containing video URL, prompt, and seed. :param response: FastAPI response object. :return: Output containing the generated audio file.
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("fal-ai/thinksound", {
input: {
video_url: "https://storage.googleapis.com/falserverless/example_inputs/thinksound-input.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);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("fal-ai/thinksound", {
input: {
video_url: "https://storage.googleapis.com/falserverless/example_inputs/thinksound-input.mp4"
},
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("fal-ai/thinksound", {
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("fal-ai/thinksound", {
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.
enable_safety_checker booleanDefault value: true
video_url string* requiredThe URL of the video to generate the audio for.
prompt stringA prompt to guide the audio generation. If not provided, it will be extracted from the video. Default value: ""
seed integerThe seed for the random number generator
num_inference_steps integerThe number of inference steps for audio generation. Default value: 24
cfg_scale floatThe classifier-free guidance scale for audio generation. Default value: 5
sync_mode booleanIf True, the media will be returned as a data URI and the output data won't be available in the request history.
{
"enable_safety_checker": true,
"video_url": "https://storage.googleapis.com/falserverless/example_inputs/thinksound-input.mp4",
"num_inference_steps": 24,
"cfg_scale": 5
}The generated video with audio.
prompt string* requiredThe prompt used to generate the audio.
{
"video": {
"url": "https://storage.googleapis.com/falserverless/example_outputs/thinksound-output.mp4"
},
"prompt": "An acoustic guitar being played indoors."
}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.