imagesFromVideo

#!/bin/bash

# at what interval to extract frames, in seconds
interval=30

for file in *; do
  nameWithoutExtension="${file%.*}"
  extension="${file##*.}"

  if [ $extension == 'mp4' ] || [ $extension == 'mkv' ] || [ $extension == 'avi' ]; then
    mkdir "$nameWithoutExtension"

    file_duration=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$file")
    loop_end=$(echo $file_duration/$interval | bc)

    for ((i = 1; i <= $loop_end; i++)); do
      ffmpeg -accurate_seek -ss `echo $i*$interval | bc` -i "$file" -frames:v 1  -q:v 1 "$nameWithoutExtension"/$i.jpg;
    done
  fi
done