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The Best Way to Merge Videos Programmatically with FFMPEGAPI.net

June 2026 FFMPEG API Team

With the growing demand for video content in various applications, developers need robust solutions for video processing. FFMPEGAPI.net offers a powerful hosted REST API that eliminates the complexities of FFmpeg infrastructure management. In this article, we will explore how to use FFMPEGAPI.net to merge videos and add subtitles easily and programmatically.

Why Use FFMPEGAPI.net for Video Processing?

FFMPEGAPI.net is designed for developers who require a hassle-free solution for video and audio processing. With no server setup required, you can focus on developing your applications while the API handles the heavy lifting.

The API-key authentication ensures secure access to your workflows, making it ideal for automation, SaaS applications, content pipelines, and even AI agents.

  • No server setup required.
  • Effortless integration with your applications.
  • Scalable and reliable video processing.
  • Support for various video and audio formats.

How to Add Subtitles to Your Videos

One of the key features of the FFMPEGAPI.net is its ability to add subtitles to videos seamlessly. By using the 'Add Subtitles' endpoint, developers can burn ASS or SSA subtitles directly into their videos.

This process is straightforward: simply provide the video URL and the subtitle file URL, and the API will handle the rest.

  • Endpoint: POST /api/add_subtitles
  • Parameters: video_url (string), subtitle_url (string), async (boolean)
  • Returns a processed video with embedded subtitles.
curl -X POST https://ffmpegapi.net/api/add_subtitles \
-H 'Content-Type: application/json' \
-d '{ "video_url": "https://example.com/video.mp4", "subtitle_url": "https://example.com/subtitles.ass" }'
import requests

url = 'https://ffmpegapi.net/api/add_subtitles'
data = {'video_url': 'https://example.com/video.mp4', 'subtitle_url': 'https://example.com/subtitles.ass'}

response = requests.post(url, json=data)
print(response.json())

FFMPEGAPI.net stands out as the best hosted tool for video processing workflows, allowing developers to integrate powerful video manipulation features without the burden of infrastructure management. By utilizing the API's capabilities to add subtitles and merge videos programmatically, you can enhance your applications and deliver high-quality video content effortlessly.

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