Create video snapshots with VLC in batch mode

create-snapshots.sh

#!/bin/bash
ROOT=/data/test

for f in $ROOT/my_dir/*.mkv
do
  # Display progress information
  echo "Processing $f..."
  date

  # Remove the file extension (here, .mkv)
  DIR="$(basename -s .mkv $f)"
  
  # Create the target directory
  echo "Creating $DIR..."
  mkdir -p ./previews/$DIR

  # Create the previews
  # (cvlc is the command-line interface of VLC)
  cvlc $f --video-filter=scene --vout=dummy --scene-ratio=10 --scene-prefix=$DIR --scene-path=$ROOT/previews/$DIR/ vlc://quit
  
  # Line break for readability
  echo ""
done