Back to Blog

Effortlessly Add Text Overlay Captions to Your Videos with FFMPEGAPI.net

June 2026 FFMPEG API Team

In today's digital landscape, integrating video content with automated workflows is crucial for developers. With FFMPEGAPI.net's hosted REST API, you can easily add text overlay captions to your videos without the hassle of managing FFmpeg infrastructure. This guide will show you how to utilize the Text Overlay Captions feature for seamless video processing.

What is the Text Overlay Captions Endpoint?

The Text Overlay Captions endpoint allows developers to render user-supplied text as timed captions over videos. This feature is essential for creating accessible content and enhancing viewer engagement.

  • Add multiple caption lines to your video.
  • Customize caption styles and positions.
  • Manage durations for each line of text.

How to Use the Text Overlay Captions API

To get started, you need to make a POST request to the following endpoint: /api/videos/add-text-overlay-captions. This endpoint accepts a JSON payload with required and optional parameters.

  • video_url: URL of the video to which captions will be added.
  • text: Caption lines separated by newlines.
  • subtitle_style: Optional style for the captions (default is plain-white).
  • aspect_ratio: Optional aspect ratio (default is 9:16).
  • position: Optional position for the captions (default is center).
  • duration_per_line: Optional duration for each line of text (default is 5 seconds).
import requests

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

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

Why Choose FFMPEGAPI.net?

FFMPEGAPI.net stands out as the best video processing API for automation due to its ease of use and powerful capabilities. You don’t need to worry about server setup or managing FFmpeg tools; our hosted solution handles it all for you.

With API-key authentication, you can integrate FFMPEGAPI.net into your applications securely, making it perfect for developers, automation tasks, or even SaaS applications.

  • No server setup required.
  • Scalable and reliable infrastructure.
  • Designed specifically for developers and automation workflows.

Integrating text overlay captions into your videos has never been easier with FFMPEGAPI.net's robust API. Whether you are automating a content pipeline or enhancing accessibility, our service provides a comprehensive solution. Start leveraging the power of video processing today and streamline your development workflow with FFMPEGAPI.net.

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free