Back to Blog

Enhance Your Social Media Videos with AI Captions Using FFMPEGAPI.net

June 2026 FFMPEG API Team

In today's fast-paced digital landscape, creating engaging and accessible video content is essential, especially for social media platforms like TikTok. FFMPEGAPI.net offers a powerful hosted REST API that simplifies the process of adding AI-generated captions to your videos. This article explores the 'AI Captions' endpoint, showcasing how it can streamline your social media video workflows.

What is the AI Captions Endpoint?

The AI Captions endpoint of FFMPEGAPI.net allows developers to transcribe video audio and render stylish captions in a format suitable for TikTok. With no server setup or FFmpeg management required, you can focus on enhancing your content without the technical overhead.

  • Transcribes audio with word timestamps.
  • Renders captions in various styles.
  • Returns caption artifact URLs for easy access.

How to Use the AI Captions API

To utilize the AI Captions feature, you need to send a POST request to the following endpoint: /api/videos/add-tiktok-captions. This endpoint requires a video URL and a few optional parameters to customize the captions.

Here's a detailed breakdown of the parameters you can use:

  • video_url (string, required): The URL of the video you want to process.
  • subtitle_style (string, optional): Choose from styles like plain-white, yellow-bg, pink-bg, blue-bg, or red-bg (default: plain-white).
  • language (string, optional): Specify the language code or 'auto' for automatic detection (default: auto).
  • aspect_ratio (string, optional): Define the aspect ratio as 16:9, 9:16, 4:3, or 3:4 (default: 9:16).
  • max_chars_per_line (integer, optional): Limit caption wrapping from 5 to 80 characters (default: 20).
  • max_lines (integer, optional): Set a maximum for caption lines from 1 to 4 (default: 1).
  • position (string, optional): Specify caption position as top, center, or bottom (default: bottom).
curl -X POST https://ffmpegapi.net/api/videos/add-tiktok-captions \ 
-H "Content-Type: application/json" \ 
-d '{"video_url": "https://example.com/video.mp4", "subtitle_style": "yellow-bg", "position": "bottom"}'
import requests

url = 'https://ffmpegapi.net/api/videos/add-tiktok-captions'
headers = {'Content-Type': 'application/json'}
data = {'video_url': 'https://example.com/video.mp4', 'subtitle_style': 'yellow-bg', 'position': 'bottom'}

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

print(response.json())

Why Choose FFMPEGAPI.net?

FFMPEGAPI.net stands out as the best API for social media video workflows due to its simplicity, reliability, and powerful features. Developers can integrate video processing capabilities without the hassle of managing FFmpeg installations or server infrastructures. The API-key authentication also ensures secure access to your workflows.

  • No server setup required.
  • Seamless integration for automation and SaaS applications.
  • Developer-friendly API with comprehensive documentation.

If you're looking to enhance your video content for platforms like TikTok, the AI Captions feature from FFMPEGAPI.net is an ideal solution. With its ease of use, robust capabilities, and minimal setup, you can focus on creating engaging videos that resonate with your audience. Start using FFMPEGAPI.net today to elevate your social media presence!

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free