Someone (I would assume it was Kevin Atkinson, the author of the above filter but
can't find the message now...) posted recently about temporal-med and wanted feedback.
I've been using it for a little over a week now and it seems to really work well. I
get a little bit of interference because of the distance of the video cable I'm using
(not noticeable really, but there if you look for it). This filter seems to do a good
job of removing it. I use the following command line:
med interlaced true mode search show denoise pwidth 2 pheight 1
I used 'mode median', but it caused some problems. Wrinkles on people's shirts, for
example, would 'disappear' as the person moved then re-appear once the person stopped.
Made for an interesting effect - too bad it can't take the wrinkles out of my clothes
in real life :-) I wasn't able to get it to stop doing that and still see any
improvement. But the 'search' mode seems to work quite well.
The full chain-o-stuff I run my video through is as follows (not that anyone cares,
but I know sometimes people can find it useful...)
nice exportvideo -D 0 -Y 2 ${aName}.nuv 2>/dev/null | \
nice yuvscaler -I ACTIVE_$Border -v 0 -O INTERLACED_TOP_FIRST | \
nice yuvkineco -F 1 -i 0 -c 12 -n 15 -S 4 -C ${aName}.lst | \
nice med interlaced false mode search show denoise pwidth 2 pheight 1 | \
nice mpeg2enc -f 8 -b ${aRate} -V 230 -n n -s -a 2 -g 6 -G 18 -I 0 -Q 0.00 \
-r 24 -4 2 -2 2 -N -v 0 -p -F 1 -o ${aName}.m2v
This does a near-perfect pulldown for me and produces a sharp looking picture. Note
that '${aRate}' is a calculated bit rate depending on the length of movie encoded.
ACTIVE_$Border depends on the type of movie I'm encoding (some are recording in
standard 4:3 NTSC, but were letterboxed so on those I give a different black border
from others...) I noticed if I use 'med' before yuvkineco that pulldown sometimes
doesn't work quite right (see quite a bit of dropping the wrong frame, which I'm sure
I could resolve by playing with more of the yuvkineco parameters...but it is one of
those things where it is working the way I want it so I'm not touching it :-)
-- Ray
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