Cool filter.
Could you look at how we do 2-pass analyze/apply filters in vid.stab and
loudness and follow that
convention?https://github.com/mltframework/mlt/blob/master/src/modules/vid.stab/filter_vidstab.ymlhttps://github.com/mltframework/mlt/blob/master/src/modules/plus/filter_loudness.ymlIf
all 2-pass filters use the same method for the "results" parameter, then it is
easy to abstract 2-pass filters in applications because they all work the same.
You might like to borrow some other documentation from vid.stab: To use with
melt, use 'melt ... -consumer xml:output.mlt all=1 real_time=-1' for the first
pass. Parallel processing (real_time < -1 or > 1) is not supported for the
first pass. For the second pass, use output.mlt as the input.
Is it possible for the rectangle to be changed to an oval?
~Brian
From: Jean-Baptiste Mardelle <j...@kdenlive.org>
To: mlt-devel@lists.sourceforge.net
Sent: Friday, April 15, 2016 10:09 AM
Subject: [Mlt-devel] New motion tracker filter
Hi all,
I spend my day working on an OpenCV based filter to do motion tracking in
MLT, since the current "motion_est" and "autotrack" filters are really bad
at this. My OpenCV version seems to work quite well, but I have only done
some minimal testing.
Code is currently available in my git clone:
https://github.com/j-b-m/mlt.git
in the opencv branch. The filter is in src/modules/opencv.
It relies on OpenCV 3.1.0, which does sadly not seem to be widely
distributed.
The filter takes a rectangle as argument, and will draw a rect around the
object while playing. color and rect fill are customizable.
The filter can also analyse the video if the "analyse" property is set to
1. This will then store an animated rect property in the filter, so that on
later playings and seeking, we don't need to reprocess.
Filter is currently called "tracker", and you can browse the code here:
https://github.com/j-b-m/mlt/tree/opencv/src/modules/opencv
I will do some more testings, but if you already have comments, it's
welcome.
regards.
jb
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