Silero · VAD

Silero VAD

Detects speech regions in audio for trimming, segmentation and preprocessing.

silero-vad

$0.005 / audio minuteTry in Console

Current model-specific price from our catalog. Requests require your project API key and sufficient balance. Availability is checked at execution time.

Input and capabilities

Upload a short audio or video file using multipart/form-data: at most 30 seconds and 20 MiB. Use WAV for the examples below. Container compatibility depends on the model.

realtime input
streaming output
endpointing
vad

Automatic language detection: not supported.

API endpoint

POST https://api.speechinfra.com/v1/inference/silero-vad

Authenticate with your Speechinfra project key. Read the quickstart and billing guide.

cURL

curl --fail-with-body "https://api.speechinfra.com/v1/inference/silero-vad" \
  -H "Authorization: Bearer $SPEECH_API_KEY" \
  -F "file=@clip.wav" \
  --form-string "threshold=0.5" \
  --form-string "min_speech_duration_ms=250" \
  --form-string "min_silence_duration_ms=100" \
  --form-string "speech_pad_ms=30"

Python

# pip install httpx
import os
import httpx

headers = {"Authorization": "Bearer " + os.environ["SPEECH_API_KEY"]}
with open("clip.wav", "rb") as audio:
    response = httpx.post(
        "https://api.speechinfra.com/v1/inference/silero-vad",
        headers=headers, files={"file": ("clip.wav", audio, "audio/wav")},
        data={
    "threshold": "0.5",
    "min_speech_duration_ms": "250",
    "min_silence_duration_ms": "100",
    "speech_pad_ms": "30"
}, timeout=90,
    )
response.raise_for_status()
print(response.json())

Node.js / fetch

// Node.js 22+, no SDK required.
import { readFile } from 'node:fs/promises';
const form = new FormData();
form.set('file', new Blob([await readFile('clip.wav')]), 'clip.wav');
for (const [key, value] of Object.entries({
  "threshold": "0.5",
  "min_speech_duration_ms": "250",
  "min_silence_duration_ms": "100",
  "speech_pad_ms": "30"
})) form.set(key, value);
const response = await fetch("https://api.speechinfra.com/v1/inference/silero-vad", {
  method: 'POST', body: form, signal: AbortSignal.timeout(90000),
  headers: { Authorization: 'Bearer ' + process.env.SPEECH_API_KEY },
});
if (!response.ok) throw new Error(await response.text());
console.log(await response.json());

Request parameters

Generated from the API schema for this deployment. Conditional parameters apply only when their controlling setting is enabled.

Parameter	Type	Details
`file` Required	string	Short audio or video file. Direct API limit: 30 seconds, 20 MiB.
`threshold`	number	default: 0.5 · min: 0 · max: 1
`min_speech_duration_ms`	integer	default: 250 · min: 32 · max: 10000
`min_silence_duration_ms`	integer	default: 100 · min: 32 · max: 10000
`speech_pad_ms`	integer	default: 30 · min: 0 · max: 2000

Complete request schema

{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "file"
  ],
  "properties": {
    "file": {
      "type": "string",
      "format": "binary",
      "description": "Short audio or video file. Direct API limit: 30 seconds, 20 MiB."
    },
    "threshold": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "default": 0.5
    },
    "min_speech_duration_ms": {
      "type": "integer",
      "minimum": 32,
      "maximum": 10000,
      "default": 250
    },
    "min_silence_duration_ms": {
      "type": "integer",
      "minimum": 32,
      "maximum": 10000,
      "default": 100
    },
    "speech_pad_ms": {
      "type": "integer",
      "minimum": 0,
      "maximum": 2000,
      "default": 30
    }
  }
}

Response schema

The schema below describes the response; optional fields depend on model settings.

View complete response schema

{
  "$defs": {
    "VadRange": {
      "properties": {
        "start": {
          "title": "Start",
          "type": "number"
        },
        "end": {
          "title": "End",
          "type": "number"
        }
      },
      "required": [
        "start",
        "end"
      ],
      "title": "VadRange",
      "type": "object"
    }
  },
  "properties": {
    "speech": {
      "items": {
        "$ref": "#/$defs/VadRange"
      },
      "title": "Speech",
      "type": "array"
    },
    "duration": {
      "title": "Duration",
      "type": "number"
    },
    "model": {
      "default": "silero-vad",
      "title": "Model",
      "type": "string"
    },
    "cpu_seconds": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "title": "Cpu Seconds"
    },
    "threshold": {
      "default": 0.5,
      "title": "Threshold",
      "type": "number"
    }
  },
  "required": [
    "speech",
    "duration"
  ],
  "title": "VadResult",
  "type": "object"
}