thumbnails.sh

#!/usr/bin/env bash
# Erstellt Vorschaubilder fuer Videos auf dem Terminal

# $1 = Video (sollte klein sein sonst dauert es ewig)
# $2 = Ausgabebild (JPG, hat gleiches Format wie Video)
# $3 = Zeitpunkt für Snapshot, Format hh:mm:ss[.xxx] z.B. 00:00:31

input_file=$1
target_dir=$2
thumb_time=$3

target_basename=${target_dir}$(basename -s '.orig.mp4' $input_file)
target_file=$target_basename.jpg

if [ -e $target_file ]; then
  rm $target_file ${target_basename}-thumb640.jpg ${target_basename}-thumb120.jpg
fi

ffmpeg -i $input_file -ss $thumb_time -vframes 1 -f image2 -loglevel panic $target_file

#create thumbnail with 120 pixel width
convert -quality 95 -resize 120x $target_file ${target_basename}-thumb120.jpg;
#create thumbnail with 640 pixel width
convert -quality 95 -resize 640x $target_file ${target_basename}-thumb640.jpg;

exit 0