Detect bluriness in frames extracts from video and copy the best 10 to another directory

detect.sh

# Extract frames
ffmpeg -i filename.mov -ss 30 -to 65 -vsync 0 -q:v 2 out%03d.jpg

for i in out*.jpg ; do
  echo $i $( convert $i -colorspace gray -statistic StandardDeviation 5X5 - | identify -verbose - | grep deviation ) ; 
done | tee deviation.txt


mkdir good
cat deviation.txt  | sort -n -t ":" -k 2 | tail -20 | cut -b -10 | xargs cp -t good