xray compares media files by their perceptual hash and identifies dupes.

This means files are not compared byte-for-byte, but by their visual content. It will (or at least it should) find duplicates of videos, even when they are encoded in different formats, bitrates and/or resolutions.

xray scans a given directory. Each video file it finds gets analyzed by taking several snapshots of the video content. Those images are then p-hashed and compared with all other videos it found. If xray considers two videos similar enough it will output that it found a dupe and additionally shows you a similarity score.

In case xray thinks it found a perfect match, it will also calculate the sha1sum of both videos to safely identify exact copies of a file.

xray depends on QtCore (Qt >= 5.2), ffmpeg and phash. You should be able to find existing packages for your system. On Ubuntu install "libphash0-dev", on Arch install "phash" from AUR, on OS X "brew install phash".

qmake xray.pro
make

./xray /media/videos

So far this is just a working proof-of-concept. Plans to enhance & improve xray:

• CLI params for consts, like thresholds, hamming distance etc.
• Center-crop and re-scale frames to eliminate issues with borders and aspect ratios.
• Combine individual frame hashes into one big file hash.
• Compare video frames and when finding a reasonably close one, do a close inspection comparing more of the surrounding frames of both files.
• Store hashes in a file (sqlite/unqlite/textfile) to speed up future comparisons.
• Offer to automatically quarantine dupe files.
• Provide an interactive mode.
• Drop external snapshot process. Directly use libvlc or ffmpeg or such.

Enjoy!