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C++ Tool That Extracts Text From Scrolling Screen Recordings
Palimpsest is a new CLI tool designed to extract text from scrolling screen recordings, developed through AI assistance. Facing the challenge of extracting dense banking regulatory text from hours of video, the creator built a solution that runs with exceptional accuracy — up to 94.56% — by implementing advanced techniques like dwell gating to filter key frames. The tool not only processes video locally but also avoids the pitfalls of traditional OCR methods, providing efficient document generation for various users.
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Published 24 Aug 2026, 06:50 UTC6 min read
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Summary
TL;DR
- AI-generated C++ code for the text-extraction tool
- Achieves 94.56% accuracy on dense text
- Processes videos at 323 FPS with efficient memory use
- Dwell gating technique maximizes frame quality for OCR
- Supports local processing with no cloud uploads
Interesting facts
- Named after palimpsests, historical manuscripts that were rewritten
- Can handle various video lengths without increased memory usage
- Utilizes a strictly staged producer-consumer pipeline architecture