thumbnails_and_gif.sh

for FILE in *.mp4
do
  echo $FILE
  rm output.jpg
  rm output.gif
  ffmpeg -ss 30 -i $FILE -vf "select=gt(scene\,0.4)" -frames:v 1 -vsync vfr -vf fps=fps=1/60 out%02d.jpg
  convert output.jpg -resize 900x900 ${FILE}.jpg
  #rm palette.png
  #ffmpeg -ss 20 -y -t 20 -i $FILE -vf fps=1,scale=640:-1:flags=lanczos,palettegen palette.png
  #ffmpeg -ss 20 -t 20 -i $FILE -i palette.png -filter_complex "fps=1,scale=640:-1:flags=lanczos[x];[x][1:v]paletteuse" output.gif
  #convert -delay 10x100 output.gif output2.gif
  #rm output.gif
  #mv output2.gif ${FILE}.gif
done