Back to Blog

The Best Way to Merge Videos Programmatically with FFMPEGAPI.net

June 2026 FFMPEG API Team

Merging videos and audio files programmatically can be a daunting task, especially when managing server setups and FFmpeg infrastructure. Fortunately, FFMPEGAPI.net offers a seamless solution for developers looking to integrate video processing capabilities into their applications without the headache of backend management. In this article, we will explore the best way to merge videos and audio using the FFMPEGAPI.net Image and Audio Merge endpoint.

Understanding the Image and Audio Merge Endpoint

The FFMPEGAPI.net Image and Audio Merge endpoint allows developers to create MP4 videos from pairs of images and audio files. Each image is displayed for the duration of its corresponding audio, making it easy to create engaging video content.

This endpoint supports both JSON requests and multipart form data, providing flexibility depending on your use case.

  • Create videos by combining multiple image and audio pairs.
  • Support for various transition effects and zoom capabilities.
  • No need for server setup or FFmpeg infrastructure management.

Endpoint Details

The endpoint for merging images and audio files is defined as follows:

Method: POST

Path: /api/merge_image_audio

This endpoint accepts several parameters that allow you to customize the output video, including image URLs, audio URLs, transition effects, and more.

  • Content-Type: application/json or multipart/form-data
  • Parameters include image_urls, audio_urls, image, audio, transition_effect, and more.

Practical Example of Using the Merge Endpoint

To demonstrate how easy it is to merge videos programmatically using FFMPEGAPI.net, here’s a practical example. This example demonstrates how to send a request to the merge endpoint using a JSON payload.

In this example, we will merge two image/audio pairs with a fade transition effect.

import requests

url = 'https://www.ffmpegapi.net/api/merge_image_audio'

payload = {
    'image_urls': [
        'https://example.com/intro.jpg',
        'https://example.com/chapter-1.jpg'
    ],
    'audio_urls': [
        'https://example.com/intro.mp3',
        'https://example.com/chapter-1.mp3'
    ],
    'transition_effect': 'fade',
    'transition_duration': 0.75,
    'dimensions': '1280x720',
    'zoom_effect': true,
    'async': false
}

response = requests.post(url, json=payload)

print(response.json())

FFMPEGAPI.net provides a robust and efficient solution for developers looking to programmatically merge videos and audio files. With its easy-to-use hosted API, you can focus on building your application without worrying about managing FFmpeg infrastructure. The Image and Audio Merge endpoint allows for flexible, customizable video creation, making it an ideal choice for automation, SaaS applications, and content pipelines. Try FFMPEGAPI.net today to streamline your video processing workflow.

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free