Generate live subtitles with AWS Elemental Inference Smart Subtitles

This article introduces AWS Elemental Inference Smart Subtitles, a feature that automatically generates live subtitles integrated directly into AWS Elemental MediaLive channels.

• Automatically generates subtitles for live content with proper formatting and speaker detection
• Supports six languages: English, Spanish, Portuguese, Italian, German, and French
• Outputs subtitle-ready text with aspect-ratio-aware line wrapping and speaker diarization
• Seamlessly integrates with MediaLive; enable via console in three configuration steps
• Supports custom dictionaries for domain-specific vocabulary and profanity filtering
• Delivers WebVTT for HLS outputs and TTML for CMAF/MediaPackage ingest
• Uses LLMs to bootstrap custom dictionaries with player names and event-specific terms
• Fully managed service with graceful failure; subtitles disappear but stream continues

Smart Subtitles simplifies live subtitle generation by integrating directly into existing MediaLive workflows without external services or additional account management.