Automate Adding Subtitles to Videos at Scale with the SRTGen API

As video content creation continues to scale exponentially, managing manual workflows for transcription, translation, and rendering creates a severe operational bottleneck. For platforms, enterprise agencies, and high-volume developers, manually uploading files into user interfaces is simply not an option. You need robust programmatic pipelines.

Enter the SRTGen API: a developer-focused, high-performance REST engine built explicitly to completely automate your subtitle lifecycle. Let's explore how you can programmatically transcribe media, localize into over 100 languages, and leverage our remote rendering clusters to hardcode beautifully styled ASS captions onto your videos.

1. Secure Authentication

Integrating with SRTGen is straightforward and secure. All programmatic access is managed via standard API Keys passed within request headers. Simply include your key in the x-api-key header of every request.

Header: x-api-key: YOUR_API_KEY

API access is exclusively unlocked for our Pro and Business tier users, ensuring dedicated rendering capacity and premium webhook/polling limits.

2. Automated Transcription (POST /api/v1/transcribe)

Submitting media for automated AI analysis requires just a single REST endpoint. You can supply media files directly via multipart/form-data upload (supporting heavy files up to 2GB) or pass a direct public videoUrl to skip local storage handling entirely.

• Audio/Video Support: MP4, MOV, WEBM, MP3, WAV, FLAC, and more.
• Contextual Accuracy: Configurable source language selection or automatic multi-language detection.
• Advanced Filtering: Optional parameters to automatically strip disfluencies (filler words like 'uh' and 'um') or filter profanity.

The API responds instantly with a tracking projectId while asynchronous task execution initiates on our cluster.

3. One-Tap Translation (POST /api/v1/translate)

Scaling your content globally has never been easier. Once a project is transcribed, submit its ID along with an ISO target language code (e.g., es for Spanish or zh-CN for Simplified Chinese) to instantly translate the timeline.

Our translation engine preserves delicate timing metadata perfectly. Sentences are dynamically segmented, split, or merged to guarantee pacing constraints and line breaks align visually with spoken speech patterns across all supported 100+ languages.

4. High-Fidelity Video Burning (POST /api/v1/burn)

This is where the SRTGen API pulls far ahead of traditional text-only services. You don't need external media tools to hardcode custom visual styles. Submit your project ID to our cloud rendering engine to permanently embed advanced ASS subtitle overlays directly onto your MP4 output.

You have full access to granular JSON styling matrices programmatically:

• Style Settings: Map fonts, size ratios, alignment vectors (1-9 positioning), customized stroke weights, and glowing neon shadow depths.
• Viral Karaoke Effects: Apply automatic word-by-word highlights (k, kf, ko, ks tag formats) to drive social media retention automatically.
• Line Breaking Logic: Set character caps, balance multi-line phrases, and specify gap thresholds cleanly.
• Multi-Language Tracks: Render dual subtitle outputs synchronously (e.g., primary language above secondary source code) within the exact same video frame.

5. Exporting Assets & Status Tracking (POST /api/v1/export/:projectId)

Poll your background jobs seamlessly using our unified export hub. Retrieve finalized outputs in production-ready plaintext formats including srt, vtt, ass, txt, json, or securely download finalized hardcoded MP4 stream assets.

For full structural visibility, endpoints like GET /api/v1/balance provide programmatic tracking of account storage quotas and active subscription cycle credit limits, allowing zero-downtime execution management for complex backends.

Start Building Today

Ready to supercharge your media platforms? Explore our interactive endpoint references on the API Documentation Page and generate your live keys directly in the API Management Console. Scale your video workflows automatically with the raw power of SRTGen.