mpv/TOOLS/sws-test

#!/bin/sh

if [ $# -lt 3 ] ; then
	echo "sws-test <video-file> <start-pos> <res>"
	echo "example: sws-test abc.avi 10 160:120"
	exit 1
fi

for i in `seq 0 10` ; do
	mplayer -vo png $1 -ss $2 -frames 3 -sws $i -vf scale=$3
	rm 00000001.png
	mv 00000002.png sws-`basename $1`-$2-$3-$i.png
done

#gauss with lowwer variance
        mplayer -vo png $1 -ss $2 -frames 3 -sws 7 -vf scale=$3:0:50
	rm 00000001.png
	mv 00000002.png sws-`basename $1`-$2-$3-7-50.png