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Video Duplicate Finder (VDF) finds duplicate videos and images by comparing their visual content, not their bytes. It catches re-encodes, different resolutions, watermarked copies, flipped versions, clips cut from longer videos and (with the AI pass enabled) even cropped or heavily edited copies.

Where to start

Setup & Use - install, first launch, and your first scan
How Duplicate Detection Works - what the scanner actually compares and how to tune it
AI Matching - the optional neural pass for edited copies and visual clip detection
Partial Clip Detection - finding excerpts of longer videos via audio fingerprinting
Performance & Parallelism - parallel workers, per-drive limits, native FFmpeg bindings

Quick start

Start VDF. If FFmpeg/FFprobe are missing, VDF offers to download them.
Add the folders you want to check under Where to look.
Pick a scan profile under What to look for (start with Edited & altered copies).
Press Scan, review the results, delete what you don't need.

That is the whole workflow. Everything else on this wiki is for tuning.

Other frontends

Besides the desktop app there is a CLI (VDF.CLI, also usable via Docker) and a web interface (VDF.Web, Docker). Both share the same scanning engine and database, and nearly every setting described in this wiki has a matching command-line option (VDF.CLI scan --help lists them).