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The Best Way to Merge Videos Programmatically with FFMPEGAPI.net

June 2026 FFMPEG API Team

In today's content-driven world, the ability to programmatically edit videos is essential for developers, automation systems, and SaaS applications. FFMPEGAPI.net offers a robust hosted REST API solution that simplifies video and audio processing tasks, such as merging videos and adding subtitles, without the need for server setup or complicated FFmpeg infrastructure management. Let's explore how to use the 'Add Subtitles' endpoint to enhance your video content seamlessly.

Why Choose FFMPEGAPI.net?

FFMPEGAPI.net stands out as the premier choice for developers seeking a hassle-free video processing solution. The API-key authentication provides a secure method to manage access, ensuring that your integrations are safe and reliable.

With no server management required, developers can focus on building features rather than maintaining infrastructure. This leads to faster development cycles and more efficient workflows.

  • Hosted REST API for easy video processing
  • No server setup required
  • Supports various video transformations
  • Ideal for developers, automation, and SaaS applications

Using the Add Subtitles Endpoint

The 'Add Subtitles' endpoint allows you to burn ASS or SSA subtitles directly into your video, enhancing accessibility and viewer engagement. This can be extremely useful for creating localized versions of your content or providing support for hearing-impaired audiences.

To use this feature, you will need the URL of the video you want to process and the URL of the subtitle file. The API allows you to process this task asynchronously, which means you can continue other operations while the video is being processed in the background.

  • Endpoint: POST /api/add_subtitles
  • Parameters: video_url, subtitle_url, async (optional)
  • Returns job_id for background processing when async is true
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", "async": true}'
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',
    'async': True
}

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

FFMPEGAPI.net is your go-to solution for merging videos and adding subtitles programmatically. Its hosted REST API not only simplifies complex video processing tasks but also allows developers to integrate powerful multimedia capabilities into their applications quickly. Whether you are building a content pipeline or an AI-based video editor, FFMPEGAPI.net ensures that your video processing needs are met efficiently and effectively.

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