montage.sh

#!/bin/bash

seqs="public/_big_assets/imageseqs"
rm ${seqs}/*/montage*.jpg

for dir in ${seqs}/*
do
  dir=${dir%*/}
  base=${dir##*/}

  if [ -f raw/renders/${base}/${base}mobile.mov ];
  then
    ffmpeg -i raw/renders/${base}/${base}mobile.mov -r 12 -f image2 -qscale:v 2 ${seqs}/${base}/${base}%05d.jpg
  else
    ffmpeg -i raw/renders/${base}/${base}.mov -r 12 -f image2 -qscale:v 2 ${seqs}/${base}/${base}%05d.jpg
  fi

  latest=$(ls -1 ${dir} | tail -n 1)
  gm montage -tile 4x4 -geometry 500x500 -borderwidth 0 -background white -quality 65 +adjoin ${dir}/${base}*.jpg ${dir}/montage%01d.jpg

  mv ${dir}/${base}00001.jpg ${dir}/first.jpg
  mv ${dir}/${latest} ${dir}/last.jpg
  
  rm ${dir}/${base}*.jpg
done