Exposure fusion (a.k.a. "Fake HDR") workflow for Magic Lantern

hdr.sh

#!/bin/sh
# Exposure fusion (a.k.a. "Fake HDR") workflow for Magic Lantern
# 2012-11-28 17:20:30
# Martin Müller <[email protected]>
#
# REQUIREMENTS:
# ffmpeg
# enfuse
# hugin (for align_image_stack)
#
# TO DO:
# - check for existing (and working) commands
# - option for cleaning up to save disk space
# - GUI (Graphical User Interface)

# SETTINGS:
# Where to search for the movie clips (set to . for current directory)
SEARCHPATH=.
# Resulting frame rate
FPS=25
# Path to align_image_stack executable
AIS=/Applications/Hugin/HuginTools/align_image_stack

for VIDEO in $(ls "$SEARCHPATH/"*".MOV")
do
	# Extract filename without extension from whole path to file
	FILE=$(basename "$VIDEO")
	FILENAME=${FILE%.*}

	# Check if directory exists
	if [ ! -d "$FILENAME" ]
	then
		# Create directory with video name
		mkdir "$FILENAME"

		# Split odd frames from video to image sequence with ffmpeg
		ffmpeg -i "$FILE" -filter:v select="not(mod(n\,2))",setpts="N/($FPS*TB)" -pix_fmt rgb24 -vcodec tiff "$FILENAME/$FILENAME-HDRa-%04d.tif"
		# Split even frames from video to image sequence with ffmpeg
		ffmpeg -i "$FILE" -filter:v select="mod(n\,2)",setpts="N/($FPS*TB)" -pix_fmt rgb24 -vcodec tiff "$FILENAME/$FILENAME-HDRb-%04d.tif"
	fi

	if [ ! -d "$FILENAME/aligned" ]
	then
		mkdir "$FILENAME/aligned"

		for f in $(ls "$FILENAME/$FILENAME-HDRa-"*".tif")
		do
			NUMBER=${f##*-}
			$AIS -a "$FILENAME-HDRb-aligned-" -o "$FILENAME/aligned/" "$f" "$FILENAME-HDRb-$NUMBER"
		done
	fi  

	if [ ! -d "$FILENAME/HDR" ]
	then
		mkdir "$FILENAME/HDR"

		# Merge HDRa and HDRb image sequences to single image sequence with exposure fusion
		for f in $(ls "$FILENAME/aligned/$FILENAME-HDRa-"*".tif")
		do
			NUMBER=${f##*-}
			echo "$f (+) $FILENAME/aligned/$FILENAME-HDRb-$NUMBER => $FILENAME/HDR/HDR-$NUMBER"
			enfuse -o "$FILENAME/HDR/$FILENAME-HDR-$NUMBER" "$f" "$FILENAME/aligned/$FILENAME-HDRb-$NUMBER"
		done
	fi

	# Merge enfused image sequence to ProRes 422 QuickTime video
	ffmpeg -r 25 -i "$FILENAME/HDR/$FILENAME-HDR-%04d.tif" -r 25 -vcodec prores -profile:v 2 "$FILENAME/HDR/$FILENAME-HDR.mov"
done