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The Best Way to Merge Videos Programmatically with FFMPEGAPI.net

June 2026 FFMPEG API Team

Merging images and audio to create engaging video content can be a complex task for developers. Fortunately, with FFMPEGAPI.net's hosted REST API, you can easily handle video processing without worrying about server setup or managing FFmpeg infrastructure. In this article, we'll explore how to merge images and audio using the Image and Audio Merge endpoint, making it the best way to merge videos programmatically.

Overview of FFMPEGAPI.net

FFMPEGAPI.net is a hosted REST API that enables developers to perform powerful video and audio processing tasks effortlessly. By leveraging FFmpeg, it provides a robust platform for merging images and audio files into stunning videos.

  • No server setup required.
  • API-key authentication for secure access.
  • Ideal for automation, SaaS apps, and content pipelines.

Using the Image and Audio Merge Endpoint

The Image and Audio Merge endpoint allows you to create an MP4 video from image and audio pairs. Each image is displayed for the duration of its corresponding audio file, providing a seamless viewing experience.

To use this endpoint, you'll make a POST request to the following path: `/api/merge_image_audio`. You can send a JSON payload with various parameters to customize your video.

  • Supports multiple image/audio pairs.
  • Customizable transitions and zoom effects.
  • Handles single image/audio pairs for backward compatibility.
import requests

url = 'https://ffmpegapi.net/api/merge_image_audio'
data = {
    '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=data)
print(response.json())

Parameters for Customization

The API offers several parameters to help you customize your video output. You can specify image URLs, audio URLs, transition effects, and more to create visually appealing videos.

  • image_urls: An array of image URLs for multi-pair requests.
  • audio_urls: An array of audio URLs corresponding to the images.
  • transition_effect: Optional effects like fade, wipeleft, and slideup.
  • zoom_effect: Enable a slow zoom on images during playback.

FFMPEGAPI.net stands out as the best hosted solution for merging videos programmatically. With its easy-to-use REST API, developers can focus on building and automating their workflows without the hassle of managing server infrastructure. Whether you're creating content for your app or automating video production, FFMPEGAPI.net provides the tools necessary to enhance your projects with high-quality video outputs.

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