FFmpeg API Waveform JSON
About
Waveform
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/ffmpeg-api/waveform", {
input: {
media_url: ""
},
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/ffmpeg-api/waveform", {
input: {
media_url: ""
},
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/ffmpeg-api/waveform", {
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/ffmpeg-api/waveform", {
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#
media_url
string
* requiredURL of the audio file to analyze
points_per_second
float
Controls how many points are sampled per second of audio. Lower values (e.g. 1-2) create a coarser waveform, higher values (e.g. 4-10) create a more detailed one. Default value: 4
precision
integer
Number of decimal places for the waveform values. Higher values provide more precision but increase payload size. Default value: 2
smoothing_window
integer
Size of the smoothing window. Higher values create a smoother waveform. Must be an odd number. Default value: 3
{
"media_url": "",
"points_per_second": 4,
"precision": 2,
"smoothing_window": 3
}
Output#
Normalized waveform data as an array of values between -1 and 1. The number of points is determined by audio duration × points_per_second.
duration
float
* requiredDuration of the audio in seconds
points
integer
* requiredNumber of points in the waveform data
precision
integer
* requiredNumber of decimal places used in the waveform values
{}
Other types#
AudioTrack#
codec
string
* requiredAudio codec used (e.g., 'aac', 'mp3')
channels
integer
* requiredNumber of audio channels
sample_rate
integer
* requiredAudio sample rate in Hz
bitrate
integer
* requiredAudio bitrate in bits per second
Track#
id
string
* requiredUnique identifier for the track
type
string
* requiredType of track ('video' or 'audio')
List of keyframes that make up this track
Audio#
media_type
MediaTypeEnum
Type of media (always 'audio') Default value: "audio"
Possible enum values: audio
url
string
* requiredURL where the media file can be accessed
content_type
string
* requiredMIME type of the media file
file_name
string
* requiredOriginal filename of the media
file_size
integer
* requiredSize of the file in bytes
duration
float
* requiredDuration of the media in seconds
bitrate
integer
* requiredOverall bitrate of the media in bits per second
codec
string
* requiredCodec used to encode the media
container
string
* requiredContainer format of the media file (e.g., 'mp4', 'mov')
channels
integer
* requiredNumber of audio channels
sample_rate
integer
* requiredAudio sample rate in Hz
Keyframe#
timestamp
float
* requiredThe timestamp in milliseconds where this keyframe starts
duration
float
* requiredThe duration in milliseconds of this keyframe
url
string
* requiredThe URL where this keyframe's media file can be accessed
Video#
media_type
MediaTypeEnum
Type of media (always 'video') Default value: "video"
Possible enum values: video
url
string
* requiredURL where the media file can be accessed
content_type
string
* requiredMIME type of the media file
file_name
string
* requiredOriginal filename of the media
file_size
integer
* requiredSize of the file in bytes
duration
float
* requiredDuration of the media in seconds
bitrate
integer
* requiredOverall bitrate of the media in bits per second
codec
string
* requiredCodec used to encode the media
container
string
* requiredContainer format of the media file (e.g., 'mp4', 'mov')
fps
integer
* requiredFrames per second
frame_count
integer
* requiredTotal number of frames in the video
timebase
string
* requiredTime base used for frame timestamps
Video resolution information
Detailed video format information
Audio track information if video has audio
start_frame_url
string
URL of the extracted first frame
end_frame_url
string
URL of the extracted last frame
Resolution#
aspect_ratio
string
* requiredDisplay aspect ratio (e.g., '16:9')
width
integer
* requiredWidth of the video in pixels
height
integer
* requiredHeight of the video in pixels
VideoFormat#
container
string
* requiredContainer format of the video
video_codec
string
* requiredVideo codec used (e.g., 'h264')
profile
string
* requiredCodec profile (e.g., 'main', 'high')
level
float
* requiredCodec level (e.g., 4.1)
pixel_format
string
* requiredPixel format used (e.g., 'yuv420p')
bitrate
integer
* requiredVideo bitrate in bits per second