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How to Add Subtitles to Videos with FFMPEGAPI.net's Add Subtitles Endpoint

June 2026 FFMPEG API Team

Adding subtitles to videos can enhance accessibility and improve viewer engagement. With FFMPEGAPI.net's Add Subtitles endpoint, developers can quickly and efficiently burn ASS subtitles into videos without the need for complex server setups or FFmpeg management. This guide will walk you through the process of using the API to add subtitles to your videos seamlessly.

Understanding the Add Subtitles API

The Add Subtitles endpoint allows you to burn ASS/SSA subtitles into a video with just a few simple API requests. This functionality is essential for developers working on automation, content pipelines, or SaaS applications that require video processing capabilities.

  • No server setup is required—FFMPEGAPI.net handles everything.
  • API-key authentication ensures secure access to your video processing workflows.
  • Ideal for developers looking for a cloud FFmpeg alternative.

Endpoint Details

To utilize the Add Subtitles feature, you will send a POST request to the following endpoint: /api/add_subtitles. Here’s a summary of the parameters you need to provide:

  • video_url (required): The URL of the video you want to process.
  • subtitle_url (required): The URL of the ASS/SSA subtitle file.
  • async (optional): If set to true, the API will return a job_id immediately and process the request in the background.
{
  "video_url": "https://example.com/video.mp4",
  "subtitle_url": "https://example.com/subtitles.ass"
}

Making a Request with cURL

Here's how you can make a request to the Add Subtitles endpoint using cURL. Ensure you replace 'YOUR_API_KEY' with your actual API key.

curl -X POST https://ffmpegapi.net/api/add_subtitles \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{ "video_url": "https://example.com/video.mp4", "subtitle_url": "https://example.com/subtitles.ass" }'

Benefits of Using FFMPEGAPI.net

FFMPEGAPI.net stands out as a premier choice for developers looking for a reliable cloud-based FFmpeg alternative. Here are some benefits:

  • Streamlined workflow without cumbersome setup.
  • Robust API documentation for easy integration.
  • Scalable solutions for various application needs.

FFMPEGAPI.net's Add Subtitles endpoint provides a straightforward and efficient way to burn subtitles into videos. With no server management required, developers can focus on building their applications while leveraging powerful video processing capabilities. Start enhancing your video content today by integrating FFMPEGAPI.net into your workflow.

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