Batch generate thumbnails from mp4 files using ffmpg

video-thumbnails-generator.sh

#!/bin/bash

# setup
FILES=name_of_file_to_match_*.mp4
SEEK_POINT=00:00:30
IMG_FORMAT=png
FRAME_SIZE=150X100
DEST=thumbnails

for f in $FILES
do
  echo "Generating thumbnail for $f ..."
  ffmpeg -i $f -y -an -ss $SEEK_POINT -vcodec $IMG_FORMAT -r 1 -vframes 1 -s $FRAME_SIZE $DEST/_$f.$IMG_FORMAT 
  echo "===================================================="
done