NUM=1;
cat mimi-combined-lines.ass | grep Dialog | cut -d, -f2| sed -e 's/^0/00/' -e 's/^1/01/' | while read i; do
  echo $i $NUM;
  ffmpeg -loglevel quiet  -ss "$i" -i title00.mkv -f image2 -vframes 1 $NUM.jpg;
  NUM=$((NUM+1));
done