[Libav-user] motion vectors using FFmpeg gives lots of noise

Lyndon Hill emptystate at yahoo.co.uk
Fri Jun 19 13:39:11 CEST 2015

> But the end result is: it is marking stationary places as noise as well (random arrows everywhere).

Motion vectors do not have to be the "true" motion.

Your video has large areas of no texture; the motion estimator used by your camera codec is finding false matches between blocks of nothing and other blocks of nothing.

Lyndon Hill

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