Video Audio Normalize

Normalize audio in video files to consistent loudness levels using EBU R128 standard

Click to upload file or drag and drop file here

Maximum file size: 100MB Supported formats: video/*

Target loudness standard for different platforms

Copy video stream without re-encoding (faster, no quality loss)

Key Facts

Category
Images, Audio & Video
Input Types
file, select, checkbox
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The Video Audio Normalize tool allows you to easily adjust the audio levels of your video files to a consistent loudness standard. Using the industry-standard EBU R128 algorithm, it targets specific platform presets like YouTube, Spotify, and Apple Podcasts, ensuring your videos sound professional without requiring full video re-encoding.

When to Use

  • •When your video's audio is too quiet, too loud, or inconsistent across different scenes.
  • •Before uploading video content to platforms like YouTube, Spotify, or Apple Podcasts to meet their specific loudness requirements.
  • •When you want to normalize audio quickly without losing video quality or wasting time on full video re-encoding.

How It Works

  • •Upload your video file (up to 100MB) in formats like MP4, WebM, MKV, AVI, or MOV.
  • •Select your target normalization preset, such as EBU R128, YouTube, Spotify, or Podcast.
  • •Choose your desired output format and decide whether to copy the video stream directly without re-encoding.
  • •Click process to analyze the audio track, apply the loudness normalization, and download the updated video file.

Use Cases

Preparing video podcasts for Apple Podcasts or Spotify to ensure consistent dialogue volume.
Standardizing YouTube video uploads to match the platform's specific loudness target.
Fixing uneven audio levels in recorded webinars or presentations before sharing them with an audience.

Examples

1. Optimizing a Video Podcast for Spotify

Podcast Producer
Background
A producer has recorded a video podcast episode, but the audio levels between the host and the guest are uneven, and the overall volume is too quiet for streaming platforms.
Problem
The audio needs to meet Spotify's specific loudness standards without degrading the video quality.
How to Use
Upload the video file, select 'Spotify' as the normalization preset, choose 'MP4' as the output format, and keep 'Copy Video' checked.
Example Config
Preset: Spotify, Output Format: MP4, Copy Video: Enabled
Outcome
The output video has perfectly balanced audio matching Spotify's loudness target, processed quickly without re-encoding the video stream.

2. Standardizing YouTube Video Loudness

Content Creator
Background
A creator noticed that their uploaded videos sound quieter than other videos on YouTube due to automatic platform attenuation.
Problem
The creator wants to normalize the video's audio to YouTube's target level before uploading.
How to Use
Upload the MP4 video, set the normalization preset to 'YouTube', select 'MP4' output, and run the tool.
Example Config
Preset: YouTube, Output Format: MP4, Copy Video: Enabled
Outcome
The video's audio is normalized to the exact YouTube loudness standard, preventing the platform from aggressively lowering or raising the volume.

Try with Samples

audio, video, file
Video Samples
Sample video files in different formats and orientations
title token video
video
Video AV1 Samples
Sample video files encoded in AV1 format
title token video
video
Video H.264 Samples
Sample video files encoded in H.264 (AVC) format
title token video
video
Video H.265 Samples
Sample video files encoded in H.265 (HEVC) format
title token video
video

Related Hubs

Audio Encoding and Format Conversion Tools
Compare audio format conversion, bitrate changes, sample-rate conversion, codec swaps, and export tools in one hub for delivery and archive workflows.
Video-to-Audio and Animation Conversion Tools
Compare tools that turn video into audio, extract video streams, and convert between short-form video and animated image formats in one hub.
Audio Editing and Cleanup Tools
Compare audio trimming, silence removal, fades, mixing, and denoise tools in one hub for podcast, voiceover, and music cleanup workflows.
Video Preview, Extraction, and Subtitle Tools
Compare video preview generation, stream extraction, audio extraction, subtitle translation, and quick flip tools in one hub for lightweight video prep workflows.

FAQ

What is EBU R128?

EBU R128 is an international standard for measuring and normalizing audio loudness to prevent sudden volume jumps.

Will normalizing the audio degrade my video quality?

No. By enabling the 'Copy Video' option, the video stream is copied directly without re-encoding, preserving original video quality.

What video formats are supported?

You can upload video files and export them to MP4, WebM, MKV, AVI, or MOV formats.

What is the maximum file size I can upload?

The tool supports video files up to 100MB in size.

Which platform presets are available?

Presets include EBU R128 (Standard), Spotify, YouTube, Podcast, and Apple Podcasts.

API Documentation

Request Endpoint

POST /en/api/tools/video-audio-normalize

Request Parameters

Parameter Name Type Required Description
videoFile file (Upload required) Yes -
preset select No Target loudness standard for different platforms
outputFormat select No -
videoCopy checkbox No Copy video stream without re-encoding (faster, no quality loss)

File type parameters need to be uploaded first via POST /upload/video-audio-normalize to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-video-audio-normalize": {
      "name": "video-audio-normalize",
      "description": "Normalize audio in video files to consistent loudness levels using EBU R128 standard",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=video-audio-normalize",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]