[Libav-user] motion vectors using FFmpeg gives lots of noise
mtaha.ansari at gmail.com
Sat Jun 20 08:22:56 CEST 2015
On Fri, Jun 19, 2015 at 4:39 PM, Lyndon Hill <
emptystate-at-yahoo.co.uk at ffmpeg.org> wrote:
> > 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.
I see - that's very informative to know. Maybe I need to implement simple
motion detection of my own. As a start I'm thinking of breaking a video
frame in constant blocks (like 16x16 etc) then detect change of pixels
inside each block.
Is this approach right, or do you (or anyone) has some good pointers to
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