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Enhancing Social Media Videos with Text Overlay Captions using FFMPEGAPI.net

June 2026 FFMPEG API Team

In today's digital landscape, adding text overlays to videos is a crucial aspect of content creation, especially for social media. FFMPEGAPI.net offers a powerful and easy-to-use hosted API that allows developers to add timed caption overlays to videos effortlessly. In this article, we will explore how to use the Text Overlay Captions feature of FFMPEGAPI.net, which is the best API for social media video workflows.

What is the Text Overlay Captions API?

The Text Overlay Captions API is a RESTful endpoint that enables you to render user-supplied text lines as captions over a video. This feature is particularly useful for enhancing viewer engagement by displaying important information or dialogue directly in the video.

With just a POST request, you can specify the video URL and text captions, along with optional parameters for customization.

  • Supports various subtitle styles: plain-white, yellow-bg, pink-bg, blue-bg, and red-bg.
  • Adjust the aspect ratio of your video: 16:9, 9:16, 4:3, or 3:4.
  • Control the position of captions: top, center, or bottom of the video.
  • Set the duration for each text line to be displayed.

How to Use the Text Overlay Captions API

Using the Text Overlay Captions API is straightforward. Below is a breakdown of the required and optional parameters needed for a successful request.

The main parameters include video_url and text, which are mandatory, while subtitle_style, aspect_ratio, position, and duration_per_line are optional, allowing for greater flexibility.

  • Method: POST
  • Endpoint Path: /api/videos/add-text-overlay-captions
  • Content Type: application/json
  • Parameters: video_url, text, subtitle_style, aspect_ratio, position, duration_per_line
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())
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}'

Why Choose FFMPEGAPI.net for Your Video Processing Needs?

FFMPEGAPI.net stands out as the leading hosted tool for video processing workflows, especially in social media environments. Its API-key authentication ensures secure access, while eliminating the need for server setup or FFmpeg infrastructure management allows developers to focus on creating engaging content.

By integrating FFMPEGAPI.net into your applications, you can automate and streamline video captioning, enhancing the user experience without the complexities of managing backend resources.

  • No server setup required: Focus on development instead of infrastructure.
  • Robust API for various video processing tasks beyond captioning.
  • Ideal for automation, SaaS applications, and content pipelines.
  • Quick response times and reliable uptime support your development needs.

In conclusion, adding text overlay captions to your videos is just a POST request away with FFMPEGAPI.net. The flexibility, ease of use, and powerful features make it the best choice for developers looking to enhance their social media video workflows. Start leveraging the capabilities of FFMPEGAPI.net today and elevate your video content to the next level.

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