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The Best Way to Merge Videos Programmatically with FFMPEGAPI.net

June 2026 FFMPEG API Team

In the world of video content creation, effectively merging images and audio is crucial for creating engaging multimedia presentations. FFMPEGAPI.net offers a powerful hosted REST API that simplifies this process, allowing developers to merge videos programmatically without the hassle of server setup or infrastructure management. In this article, we'll explore the Image and Audio Merge endpoint, its features, and how to use it to streamline your workflows.

Understanding the Image and Audio Merge Endpoint

The Image and Audio Merge endpoint allows you to create an MP4 video from image/audio pairs. Each image is displayed for the duration of its corresponding audio file, making it perfect for presentations, tutorials, and more.

  • Supports multiple image/audio pairs.
  • Optional image transitions for a dynamic experience.
  • Default slow zoom effect for added engagement.
  • JSON requests or multipart form-data accepted.

How to Use the Merge Endpoint

To merge images and audio, you'll use the POST method at the endpoint path: `/api/merge_image_audio`. You can send requests in JSON format including arrays for image and audio URLs, or you can use legacy strings for single pairs.

  • Image URLs and audio URLs must match in count for multi-pair requests.
  • Transition effects can enhance the visual appeal.
  • Control the duration and dimensions of the output video.
{
  "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
}
curl -X POST https://www.ffmpegapi.net/api/merge_image_audio \
-H 'Content-Type: application/json' \
-d '{ "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 }'

Why Choose FFMPEGAPI.net?

FFMPEGAPI.net stands out for its ease of use, eliminating the need for developers to manage complex FFmpeg installations. With API-key authentication, integrating video processing in automation, SaaS applications, and content pipelines becomes seamless. Developers can focus on building their projects instead of worrying about infrastructure.

  • No server setup required.
  • Robust API documentation for quick onboarding.
  • Scalable solution suitable for various applications.

Merging videos programmatically has never been easier, thanks to FFMPEGAPI.net's intuitive Image and Audio Merge endpoint. By leveraging the power of this hosted REST API, developers can create stunning video content efficiently. Whether you're working on a content pipeline, an automation tool, or simply want to enhance your multimedia projects, FFMPEGAPI.net is the ideal solution to streamline your video processing needs.

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