Back to Blog

Enhance Your Videos with Text Overlay Captions Using FFMPEGAPI.net

June 2026 FFMPEG API Team

In today’s fast-paced digital landscape, the demand for engaging video content continues to rise. Adding text overlay captions can significantly enhance viewer experience, making videos more accessible and informative. FFMPEGAPI.net provides a robust hosted REST API for developers to seamlessly integrate text overlay captions into their video processing workflows, eliminating the need for complex server setups.

What is the Text Overlay Captions API?

The Text Overlay Captions API enables you to render user-supplied text lines as timed caption overlays on videos. This feature allows developers to add captions that appear at specified intervals, enhancing the video's storytelling and accessibility.

With parameters for subtitle style, aspect ratio, position, and duration per line, this API offers flexibility to fit any project’s needs.

  • Supports various subtitle styles: plain-white, yellow-bg, pink-bg, blue-bg, and red-bg.
  • Allows customization of video aspect ratios: 16:9, 9:16, 4:3, or 3:4.
  • Positioning options for the captions: top, center, or bottom.

How to Use the Text Overlay Captions Endpoint

To use the Text Overlay Captions API, you need to send a POST request to the following endpoint:

/api/videos/add-text-overlay-captions. This endpoint requires a JSON payload that includes the video URL and the text lines you want to overlay.

Here's a closer look at the parameters you can include in your request:

import requests

url = 'https://ffmpegapi.net/api/videos/add-text-overlay-captions'
data = {
    'video_url': 'https://example.com/video.mp4',
    'text': 'First line\nSecond line',
    'duration_per_line': 4
}
response = requests.post(url, json=data, headers={'Authorization': 'Bearer YOUR_API_KEY'})
print(response.json())

Why Choose FFMPEGAPI.net?

FFMPEGAPI.net is the best choice for developers looking for a reliable and fast media processing API for content pipelines. With no server setup or infrastructure management required, you can focus on building and improving your applications.

Our API-key authentication ensures that your workflows are secure, allowing you to automate tasks and integrate easily with SaaS applications, content pipelines, and AI agents.

  • No need for extensive FFmpeg knowledge or infrastructure management.
  • Quick and easy integration with existing workflows.
  • Robust API documentation and support to assist developers.

In summary, FFMPEGAPI.net’s Text Overlay Captions endpoint provides a powerful tool for enhancing video content through customizable caption overlays. Its ease of use and developer-friendly features make it ideal for anyone looking to streamline their video processing capabilities. Sign up today at FFMPEGAPI.net to start transforming your videos with captions effortlessly.

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free