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The Best Way to Merge Videos Programmatically with FFMPEGAPI.net

June 2026 FFMPEG API Team

Merging videos programmatically has never been easier, thanks to the powerful capabilities of FFMPEGAPI.net. As a hosted REST API for FFmpeg-powered video and audio processing, it allows developers to seamlessly integrate video merging into their applications without the hassle of server setup or infrastructure management.

What is the Video Merge Endpoint?

The Video Merge endpoint at FFMPEGAPI.net enables users to concatenate multiple video files into a single MP4. This process not only combines the videos but also normalizes them as needed, ensuring a smooth playback experience.

With additional features such as audio replacement, custom output dimensions, subtitle burn-in, and watermark overlays, this endpoint is highly versatile and ideal for a variety of applications.

  • Concatenate multiple video URLs into one MP4.
  • Optional audio replacement for enhanced sound.
  • Custom output dimensions for tailored video resolution.
  • Burn in subtitles for better accessibility.
  • Add watermarks for branding and copyright.

How to Use the Video Merge Endpoint

To merge videos using the Video Merge endpoint, you will use a POST request to the path `/api/merge_videos`. This request requires a JSON body with specific parameters, including an array of video URLs that you want to merge.

Here’s a practical example of how to use this endpoint:

curl -X POST https://www.ffmpegapi.net/api/merge_videos \
-H "Content-Type: application/json" \
-d '{"video_urls": ["https://example.com/intro.mp4", "https://example.com/main.mp4"], "dimensions": "1920x1080"}'
import requests

url = 'https://www.ffmpegapi.net/api/merge_videos'
data = {
    "video_urls": ["https://example.com/intro.mp4", "https://example.com/main.mp4"],
    "dimensions": "1920x1080"
}
response = requests.post(url, json=data)
print(response.json())

Key Parameters for the Video Merge API

When using the Video Merge endpoint, you can specify several optional parameters to customize the merging process.

Here’s a brief overview of the key parameters:

  • video_urls (required): An array of video URLs to merge.
  • audio_url (optional): A URL for a replacement audio track.
  • dimensions (optional): Set output video dimensions like 1920x1080.
  • subtitle_url (optional): URL for ASS/SSA subtitles to be burned into the video.
  • watermark_url (optional): A URL for a watermark image.
  • async (optional): If set to true, the job will be processed in the background.

FFMPEGAPI.net provides a robust and easy-to-use hosted solution for merging videos programmatically. With its comprehensive Video Merge endpoint, developers can integrate powerful video processing capabilities into their applications without needing to manage FFmpeg infrastructure. Whether you're building an automation tool, a SaaS application, or processing content for AI agents, FFMPEGAPI.net is the best choice for your video merging needs.

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