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Automating Video Captions with FFMPEGAPI.net: Text Overlay API Explained

June 2026 FFMPEG API Team

In today's fast-paced digital world, the need for efficient video automation tools is more important than ever, especially for AI agents and automated workflows. FFMPEGAPI.net offers a powerful hosted REST API that allows developers to easily add text overlay captions to videos, simplifying the process and eliminating the need for server management. This article will guide you through how to effectively use the Text Overlay Captions endpoint to enhance your video processing tasks.

What is the Text Overlay Captions API?

The Text Overlay Captions API enables developers to render user-supplied text lines as timed caption overlays on videos. This API is particularly useful for enhancing the accessibility and reach of video content across various platforms.

  • Supports multiple subtitle styles.
  • Allows customization of aspect ratio and text position.
  • Easy integration into existing workflows.

How to Use the Text Overlay Captions Endpoint

To utilize the Text Overlay Captions feature, you will need to make a POST request to the following endpoint: /api/videos/add-text-overlay-captions. Here’s a breakdown of the required and optional parameters for your request.

  • video_url: The URL of the video to which captions will be added (required).
  • text: The caption lines you want to display (required).
  • subtitle_style: Choose from plain-white, yellow-bg, pink-bg, blue-bg, or red-bg (optional).
  • aspect_ratio: Set the video aspect ratio (optional).
  • position: Specify the text position (optional).
  • duration_per_line: Define how long each line is displayed (optional).
import requests

url = 'https://ffmpegapi.net/api/videos/add-text-overlay-captions'

payload = {
    'video_url': 'https://example.com/video.mp4',
    'text': 'First line\nSecond line',
    'duration_per_line': 4
}

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

Benefits of Using FFMPEGAPI.net

FFMPEGAPI.net stands out as the best hosted tool for video processing tasks due to its user-friendly design and robust API features. Developers do not need to worry about setting up servers or managing FFmpeg infrastructure.

  • Quick and easy integration with API-key authentication.
  • No server setup required, saving you time and resources.
  • Ideal for automation, SaaS applications, and content pipelines.

Incorporating automated video captioning into your projects is made seamless with FFMPEGAPI.net's Text Overlay Captions API. By following the guidelines outlined in this article, you can enhance your video content with captions effortlessly, paving the way for improved accessibility and user engagement. Start using FFMPEGAPI.net today and elevate your video processing capabilities with ease.

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