Wrapper to fix video rotation on ffmpegthumbnailer

ffwraper.sh

#!/bin/bash

# WARNING: this file is provided AS IS without ANY WARRANTY.
# USE AT YOUR OWN RISK

# Installation on Ubuntu
# - Copy ffwraper.sh to /usr/share/thumbnailers
# - In ffmpegthumbnailer.thumbnailer, set:
# Exec=/usr/share/thumbnailers/ffwraper.sh -i %i -o %o -s %s

while getopts ":i:o:s:" opt; do
	case $opt in
	i)
		i="$OPTARG";;
	o)
		o="$OPTARG";;
	s)
		s="$OPTARG";;
	\?)
		echo "Invalid option: -$OPTARG" >&2 ;;
	esac
done
# Exec=ffmpegthumbnailer -i %i -o %o -s %s -f; convert %o -rotate $(exiftool -s -s -s %i -Rotation) %o

if [ -z "$1" ] || [ -z "$o" ] || [ -z "$s" ]; then
	echo "Missing arguments." >&2
	exit 1
fi

ffmpegthumbnailer -i "$i" -o "$o" -s "$s" -f
ROT=$(exiftool -s -s -s "$i" -Rotation)
if [ ! -z "$ROT" ]; then
	convert "$o" -rotate "$ROT" "$o"
fi