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Workflow Utilities Video to Video

fal-ai/workflow-utilities/trim-video
FFMPEG Utility for Trim Video
Inference
Commercial use
Schema
LLMs
PlaygroundAPI

About

Trim a video to a specified time range.

Supports trimming by start/end time or start time with duration. Uses stream copy for fast, lossless trimming when possible, falling back to re-encoding if needed.

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/workflow-utilities/trim-video", {
  input: {
    video_url: "https://storage.googleapis.com/falserverless/example_outputs/wan-25-i2v-output.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"
});

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/workflow-utilities/trim-video", {
  input: {
    video_url: "https://storage.googleapis.com/falserverless/example_outputs/wan-25-i2v-output.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/workflow-utilities/trim-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/workflow-utilities/trim-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#

video_url string* required

URL of the video file to trim

Max file size: 476.8MB, Timeout: 30.0s

start_time float

Start time in seconds Default value: 1

end_time float

End time in seconds. If not provided, uses duration instead.

duration float

Duration in seconds from start_time. Ignored if end_time is provided. Default value: 2

{
  "video_url": "https://storage.googleapis.com/falserverless/example_outputs/wan-25-i2v-output.mp4",
  "start_time": 1,
  "end_time": 3,
  "duration": 2
}

Output#

video File* required

The trimmed video

original_duration float* required

Duration of the original video in seconds

trimmed_duration float* required

Duration of the trimmed video in seconds

{
  "video": {
    "file_size": 2550671,
    "file_name": "output.mp4",
    "content_type": "application/octet-stream",
    "url": "https://v3b.fal.media/files/b/0a8dcc60/sIg2GuYYYrmYAa2lUVgum_output.mp4"
  },
  "original_duration": 5.041667,
  "trimmed_duration": 2
}

Other types#

Image#

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

width integer

The width of the image in pixels.

height integer

The height of the image in pixels.

AudioFile#

url string* required

URL of the audio file

content_type string* required

Content type of the audio file

file_name string* required

Name of the audio file

file_size integer* required

Size of the audio file in bytes

SubtitleSegment#

start float* required

Start time in seconds (e.g., 0.0 for beginning, 5.5 for 5.5 seconds)

end float* required

End time in seconds (must be greater than start time)

text string* required

Subtitle text to display (supports multiple lines with )

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

EQBand#

frequency float* required

Center frequency in Hz (20-20000)

width float

Bandwidth in Hz Default value: 100

gain float* required

Gain in dB (-30 to 30, negative = cut, positive = boost)