vidrotate

#!/bin/bash
# (c) 2020 Leif Sawyer
# License: GPL 3.0 (see https://github.com/akhepcat/)
# Permanent home:  https://github.com/akhepcat/Miscellaneous/
# Direct download: https://raw.githubusercontent.com/akhepcat/Miscellaneous/master/vidrotate
# 

if [ -z "$1" ]
then
	echo "usage: $0 [file] [flip]"
	echo " 0 = 90CounterCLockwise and Vertical Flip"
	echo " 1 = 90Clockwise"
	echo " 2 = 90CounterClockwise (default)"
	echo " 3 = 90Clockwise and Vertical Flip"
	echo " 4 = Flip vertically"
	echo " 5 = Flip horizontally"
	echo " 6 = Flip horiz then vert"
else
	FLIP=${2:-2}  # Default to 90-degrees CCW (left)
	FLIP=${FLIP//[^0-6]/}
	if [ ${FLIP} -lt 4 ]
	then
		TOPT="transpose=${FLIP}"
	elif [ ${FLIP} -eq 4 ]
	then
		TOPT="vflip"
	elif [ ${FLIP} -eq 5 ]
	then
		TOPT="hflip"
	else
		TOPT="hflip,vflip"
	fi

	TIMEBASE="-r 65535/2733"        # work around timebase errors

	QUALITY="-crf 17"	# "-q:v 10"

	ffmpeg -noautorotate -i "${1}" -acodec copy -c:v libx264 ${QUALITY} -vf "${TOPT}" "rot-${1}"
fi