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The Best Way to Merge Videos Programmatically with FFMPEGAPI.net

June 2026 FFMPEG API Team

In the world of video processing, the ability to merge videos and add subtitles programmatically can significantly enhance user experience and content delivery. With FFMPEGAPI.net, developers can easily achieve this through a hosted REST API, eliminating the need for complex server setups or FFmpeg management. This article will guide you on how to use the 'Add Subtitles' endpoint to burn ASS subtitles into your videos seamlessly.

Why Use FFMPEGAPI.net for Video Processing?

FFMPEGAPI.net streamlines video and audio processing tasks, allowing developers to focus on building their applications without worrying about the underlying infrastructure. Here are some key benefits:

The API is designed for automation and integration into various workflows, making it ideal for SaaS applications, content pipelines, and AI agents.

  • No need for server maintenance or FFmpeg installations.
  • API-key authentication ensures secure and controlled access.
  • Scalable solution for small projects to enterprise-level applications.

Using the Add Subtitles Endpoint

The 'Add Subtitles' endpoint of FFMPEGAPI.net allows developers to burn ASS/SSA subtitle files directly into video files. This is particularly useful for creating localized content or enhancing accessibility.

To utilize this endpoint, you will need to provide both the video URL and the subtitle file URL.

  • Endpoint: POST /api/add_subtitles
  • Content-Type: application/json
  • Required Parameters: video_url, subtitle_url
curl -X POST https://www.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://www.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())

Merging videos and adding subtitles programmatically has never been simpler than with FFMPEGAPI.net. By leveraging the Add Subtitles endpoint, developers can effortlessly integrate powerful video processing capabilities into their applications. Whether you're building a content delivery platform or automating video editing tasks, FFMPEGAPI.net stands out as the best hosted tool for your workflow, offering reliability, ease of use, and robust performance.

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