Back to Blog

Add Captions to Your Videos with FFMPEGAPI.net: Simplifying Text Overlays

June 2026 FFMPEG API Team

In today’s digital landscape, adding captions to videos can enhance accessibility and improve viewer engagement. Whether you’re developing a SaaS application or automating content pipelines, FFMPEGAPI.net provides a seamless solution for adding timed caption overlays to videos. This article will guide you through using our powerful API endpoint to integrate text overlays into your projects effortlessly.

What is the Text Overlay Captions Endpoint?

The Text Overlay Captions endpoint is designed to render user-provided text as caption overlays on your videos. This feature allows you to display multiple text lines over a video, with each line appearing for a specified duration.

Using FFMPEGAPI.net, you can skip the hassle of server setup and FFmpeg infrastructure management. Our hosted REST API handles all the backend processes, allowing you to focus on integrating video processing into your applications.

  • Render captions with just a few lines of code.
  • Customizable subtitle styles and positions.
  • Supports various aspect ratios to fit your video format.

How to Use the Text Overlay Captions API

To utilize the Text Overlay Captions feature, you’ll need to make a POST request to the endpoint: `/api/videos/add-text-overlay-captions`. The request requires specific parameters to function correctly.

  • video_url: (string) URL of the video you want to overlay captions on.
  • text: (string) The caption lines, separated by newlines.
  • subtitle_style: (string) Optional style for the subtitles (default: plain-white).
  • aspect_ratio: (string) Optional aspect ratio (default: 9:16).
  • position: (string) Position of the caption (default: center).
  • duration_per_line: (integer) Time each line appears (default: 5 seconds).
curl -X POST https://www.ffmpegapi.net/api/videos/add-text-overlay-captions \
-H 'Content-Type: application/json' \
-d '{
  "video_url": "https://example.com/video.mp4",
  "text": "First line\nSecond line",
  "duration_per_line": 4
}'
import requests

url = 'https://www.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)
print(response.json())

Why Choose FFMPEGAPI.net for Video Processing?

FFMPEGAPI.net stands out as the best video processing API for automation due to its ease of use and powerful capabilities. With API-key authentication, you can ensure secure access to your workflows.

By leveraging our hosted solution, you gain the benefits of scalability without the complexity of managing your own FFmpeg infrastructure, making it ideal for developers and teams alike.

  • No need for complex setups—get started in minutes.
  • Scalable solution perfect for automation and AI applications.
  • Robust documentation and support to assist developers.

Adding text overlay captions to your videos has never been easier with FFMPEGAPI.net. With our straightforward API endpoint and flexible options, you can enhance your video content efficiently. Whether for personal projects or scalable applications, our hosted API provides the best tools for developers looking to automate video processing workflows. Visit us at https://www.ffmpegapi.net and start transforming your video content today!

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free