How Our Video Captioning Works

Video captioning services operate across multiple technical standards and accuracy tiers: AI-powered automatic captioning ($7-$27/minute) achieving 80-90% accuracy using ASR (Automatic Speech Recognition) engines like Google Speech-to-Text or AWS Transcribe with speaker diarization, human-generated captions ($97-$147/minute) delivering 99%+ accuracy with proper punctuation, speaker identification, and context-aware corrections, and specialized captioning ($197-$297/minute) for technical content with industry jargon, multiple simultaneous speakers, or poor audio quality requiring extensive research and verification. Technical specifications adhere to FCC requirements mandating 99% accuracy for live broadcasts and 100% for pre-recorded programming, WCAG 2.1 Level AA compliance ensuring 4.5:1 contrast ratios and user-controllable font sizing, and format standards including SRT (SubRip), WebVTT (Web Video Text Tracks), SCC (Scenarist Closed Caption), and embedded CEA-608/708 captions for broadcast compatibility. Professional workflows incorporate quality control processes validating timing accuracy (±0.1 seconds synchronization), reading speed compliance (140-180 words per minute for comfortable comprehension), proper line breaks avoiding awkward splits mid-phrase, sound effect notation in brackets [MUSIC PLAYING] or [DOOR SLAMS], and speaker identification with position-based or color-coded attribution. Platform-specific requirements include YouTube's automatic caption editing API for bulk corrections, broadcast specifications limiting 32 characters per line across maximum 2-3 lines, and multi-language support with professional translation services ($7-$17/minute) ensuring cultural adaptation beyond literal word-for-word conversion.