Developer guide

💎 MP4 to MP3 with Ruby

Extract audio from MP4 video files and save as MP3. Ideal for creating audio files from video content.

RubyREST APIMP4 → MP3

Use this guide to convert MP4 to MP3 with Ruby, then adapt the example to your own app, backend, or processing flow.

Overview

What this guide covers

Conversion path

Use Converterer to accept or prepare a MP4 file, trigger a MP4 to MP3 job, and return the output to your app or workflow.

Ruby example

Start with the example on this page, then adapt auth, file handling, polling, and result delivery to your environment.

Production usage

This is best suited to backend jobs, async processing, content pipelines, and repeatable conversion flows rather than one-off browser scripting.

Quick start

Get a working example in place

Code example

MP4 to MP3

require 'net/http'
require 'json'

uri = URI('https://api.converterer.com/convert')
req = Net::HTTP::Post.new(uri)
req.basic_auth(ENV['CONVERTERER_API_KEY'], '')
req.set_form(
  [
    ['input', File.open('input.mp4')],
    ['output_format', 'mp3']
  ],
  'multipart/form-data'
)

res = Net::HTTP.start(uri.host, uri.port, use_ssl: true) do |http|
  http.request(req)
end

task = JSON.parse(res.body)
puts task['id']
# Result lands at <your-destination>/<id>.mp3

Implementation notes

What to handle in your app

API endpoint

Conversion endpoint

https://api.converterer.com/convert

Use your API key for authentication and submit the source file plus the target output format in your job request.

App responsibilities

source file upload or storage handoff
job submission and status handling
success/failure handling in your backend
download or delivery of the MP3 output

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