Script for Handbrake CLI encoding standards including languages and subtitles

handbrake-iso-transcode.sh

#!/bin/sh

# Handbrake ISO tracks transcode

# Mount an ISO, and give this script
#	-i	the path to the ISO's mount directory
#	-d	the path to the destination file directory (will be created)

# TODO: Figure out how to do AC3 passthrough for 2nd track of audios

# Handbrake Presets for reference, a subset from 'HandbrakeCLI -z'
# & https://handbrake.fr/docs/en/latest/technical/official-presets.html
#    ...
#    HQ 1080p30 Surround
#        High quality H.264 video (up to 1080p30), AAC stereo audio,
#        and Dolby Digital (AC-3) surround audio, in an MP4
#        container.
#    HQ 720p30 Surround
#        High quality H.264 video (up to 720p30), AAC stereo audio,
#        and Dolby Digital (AC-3) surround audio, in an MP4
#        container.
#   ...
#    Super HQ 1080p30 Surround
#        Super high quality H.264 video (up to 1080p30), AAC stereo
#        audio, and Dolby Digital (AC-3) surround audio, in an MP4
#        container.
#    Super HQ 720p30 Surround
#        Super high quality H.264 video (up to 720p30), AAC stereo
#        audio, and Dolby Digital (AC-3) surround audio, in an MP4
#        container.
#    ...
#    Vimeo YouTube HQ 2160p60 4K
#        High quality H.264 video (up to 2160p60) and high bit rate
#        AAC stereo audio in an MP4 container. Compatible with video
#        hosting services supporting 4K video, such as Vimeo and
#        YouTube.
#    Vimeo YouTube HQ 1440p60 2.5K
#        High quality H.264 video (up to 1440p60) and high bit rate
#        AAC stereo audio in an MP4 container. Compatible with video
#        hosting services supporting 2.5K video, such as Vimeo and
#        YouTube.
#    Vimeo YouTube HQ 1080p60
#        High quality H.264 video (up to 1080p60) and high bit rate
#        AAC stereo audio in an MP4 container. Compatible with video
#        hosting services supporting 1080p60, such as Vimeo and
#        YouTube.
#    Vimeo YouTube HQ 720p60
#        High quality H.264 video (up to 720p60) and high bit rate
#        AAC stereo audio in an MP4 container. Compatible with video
#        hosting services supporting 720p60, such as Vimeo and
#        YouTube.
#    ...
#    Android 1080p30
#        H.264 video (up to 1080p30) and AAC stereo audio, in an MP4
#        container. Compatible with Android devices.
#    Android 720p30
#        H.264 video (up to 720p30) and AAC stereo audio, in an MP4
#        container. Compatible with Android devices.
#    ...
#    Apple 1080p30 Surround
#        H.264 video (up to 1080p30), AAC stereo audio, and Dolby
#        Digital (AC-3) surround audio, in an MP4 container.
#        Compatible with Apple iPhone 5, 5s, SE, 6, 6 Plus, 6s, 6s
#        Plus and later; iPod touch 6th Generation and later; iPad
#        Pro; iPad Air; iPad 3rd, 4th Generation and later; iPad
#        mini; Apple TV 3rd Generation and later.
#    Apple 720p30 Surround
#        H.264 video (up to 720p30), AAC stereo audio, and Dolby
#        Digital (AC-3) surround audio, in an MP4 container.
#        Compatible with Apple iPhone 4, 4S and later; iPod touch
#        4th, 5th Generation and later; Apple TV 2nd Generation and
#        later.
#    Apple 540p30 Surround
#        H.264 video (up to 540p30), AAC stereo audio, and Dolby
#        Digital (AC-3) surround audio, in an MP4 container.
#        Compatible with Apple iPhone 1st Generation, 3G, 3GS, and
#        later; iPod touch 1st, 2nd, 3rd Generation and later; iPod
#        Classic; Apple TV 1st Generation and later.


export PATH="~/bin:/opt/local/bin:/opt/local/sbin:/sw/bin:/sw/sbin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin"
PROG=`basename $0`
HB="HandbrakeCLI"
MAXAUDIOTRACKS=8	# DVDs support at most 8 audio tracks on each video title

esc_str() {
    echo "$1" | sed "s/'/'\\\''/g;/ /s/^\(.*\)$/'\1'/"
}

getopt -T > /dev/null
if [ $? -eq 4 ]; then
	# GNU enhanced getopt is available"
	ARGS=$(getopt -o i:d: -l "iso:,destination:" -n "${PROG}" -- "$@");
else
	# Original getopt is available"
	ARGS=$(getopt i:d: "$@");
fi

if [ $? -ne 0 ]; then
	echo "${PROG}: Usage: read the source, Luke" >&2
	exit 2
fi

eval set -- "$ARGS";

while [ $# -gt 0 ]; do
	case "$1" in
		-i | --iso )
			if [ -n "$2" ]; then
				SOURCE="$2"
				echo "${PROG}: ISO: ${SOURCE}"
			fi
			shift
			;;
		-d | --destination )
			if [ -n "$2" ]; then
				DEST="$2"
				echo "${PROG}: Destination: ${DEST}"
			fi
			shift
			;;
		-- )
			break
			;;
	esac
	shift
done

if [ "X${SOURCE}" == "X" ] || [ "X${DEST}" == "X" ]; then
	echo "${PROG}: Usage: read the source, Luke" >&2
	exit 2
else
	BASESOURCE=`basename "$SOURCE"`;
	mkdir -p "$DEST"
	for TYPE in shq1080p a540p; do
		case $TYPE in
			a540p)
				PRESET='Apple 540p30 Surround'
				SUBOPT="-s 1,2,3,4,5,6,7,8"
				HBAUDIOSTYLE='slim'
				EXT="m4v"
				MINDUR=20	# minimum duration to bother with, in seconds
				;;
			shq1080p)
				PRESET='Super HQ 1080p30 Surround'
				SUBOPT="-s 1,2,3,4,5,6,7,8"
				HBAUDIOSTYLE='fat'
				EXT="m4v"
				MINDUR=11	# minimum duration to bother with, in seconds
				;;
			webhq1440p)
				PRESET='Vimeo YouTube HQ 1440p60 2.5K'
				SUBOPT="-s 1,2,3,4,5,6,7,8"
				HBAUDIOSTYLE='fat'
				EXT="m4v"
				MINDUR=11	# minimum duration to bother with, in seconds
				;;
			webhq2160p)
				PRESET='Vimeo YouTube HQ 2160p60 4K'
				SUBOPT="-s 1,2,3,4,5,6,7,8"
				HBAUDIOSTYLE='fat'
				EXT="m4v"
				MINDUR=11	# minimum duration to bother with, in seconds
				;;
		esac

		# Enumerate titles with a scan
		echo "$PROG: Enumerating $BASESOURCE titles for $TYPE with minimum duration $MINDUR seconds"
		SCANFILE=`mktemp -t ${PROG}-Scan`
		echo "$PROG: Scan File: $SCANFILE"
		TITLESFILE=`mktemp -t ${PROG}-Titles`
		echo "$PROG: Titles File: $TITLESFILE"
		$HB --verbose 0 --title 0 --min-duration $MINDUR -i "$SOURCE" 2> "$SCANFILE"
		grep "^+ title " $SCANFILE | awk -F" |:" '{print $3}' > "$TITLESFILE"
		NUMTITLESFOUND=`wc -l "$TITLESFILE" | awk '{print $1}'`
		echo "$PROG: Found $NUMTITLESFOUND total titles of sufficient duration to transcode for $TYPE"

		# Transcode the enumerated titles
		TITLELIST=""
		while read TITLENUM junk; do
			TITLELIST="$TITLENUM $TITLELIST"
		done < "$TITLESFILE"
		rm -f "$TITLESFILE"
		echo "$PROG: Complete title list for ${TYPE}: ${TITLELIST}."
		echo ================
		for TN in $TITLELIST; do
			# Process audio info for the current title of interest alone
			echo "$PROG: Scanning audio languages for title $TN"
			LANGSFILE=`mktemp -t ${PROG}-Lang`
			echo "$PROG: Langs File: $LANGSFILE"
			$HB --verbose 0 --title $TN --scan -i "$SOURCE" 2> "$SCANFILE"
			# We always take audio track 1 to hopefully harmlessly work
			# around track labeling bug in some DVD reads (e.g., track 4
			# is 3cc=eng, but is blank, and track 1 has the audio despite
			# no 3cc= or other label
			echo "1" >> "$LANGSFILE"
			i=2;
			while [ $i -le "$MAXAUDIOTRACKS" ]; do
				echo "$PROG: Looking for audio track $i of $MAXAUDIOTRACKS"
				grep -A1 "scan: checking audio $i" "$SCANFILE" | egrep "(3cc=|lang=)"
				if [ $? -eq 0 ]; then
					echo "$PROG: Found language info for audio track $i, looks real"
					case "$HBAUDIOSTYLE" in
						# For fat, we want all audio tracks in addition to
						# track 1 from above
						fat)
							echo $i >> "$LANGSFILE"
							;;
						# For slim, we want 'eng' or 'und' in addition to
						# track 1 from above
						slim)
							grep "    + $i, .*iso639-2.*Hz," "$SCANFILE" | \
							egrep "iso639-2: (eng|und)"
							if [ $? == 0 ]; then
								echo $i >> "$LANGSFILE"
							fi
							;;
					esac
				fi
				i=`expr $i + 1`
			done
			echo ================
			# Generate -a -R -D-E for the proper number of tracks based on languages, & slim or fat
			echo "$PROG: Audio tracks of interest for style $HBAUDIOSTYLE in title $TN:"
			cat "$LANGSFILE"
			a_OPT=""
			R_OPT=""
			D_OPT=""
			E_OPT=""
			case "$HBAUDIOSTYLE" in
				# For slim, we just transcode aac
				# For fat, we transcode aac, and copy ac3
				fat)
					while read TRACKNUM junk; do
						echo "$PROG: Adding style $HBAUDIOSTYLE options for audio track $TRACKNUM in title $TN"
						if [ ! -z $a_OPT ]; then
							a_OPT="${a_OPT},$TRACKNUM,$TRACKNUM"
							R_OPT="${R_OPT},Auto,Auto"
							D_OPT="${D_OPT},0.0,0.0"
							E_OPT="${E_OPT},ca_aac,copy:ac3"
						else
							a_OPT="$TRACKNUM,$TRACKNUM"
							R_OPT="Auto,Auto"
							D_OPT="0.0,0.0"
							E_OPT="ca_aac,copy:ac3"
						fi
					done < "$LANGSFILE"
					;;
				slim)
					while read TRACKNUM junk; do
						echo "$PROG: Adding style $HBAUDIOSTYLE options for audio track $TRACKNUM in title $TN"
						if [ ! -z $a_OPT ]; then
							a_OPT="${a_OPT},$TRACKNUM"
							R_OPT="${R_OPT},Auto"
							D_OPT="${D_OPT},0.0"
							E_OPT="${E_OPT},ca_aac"
						else
							a_OPT="$TRACKNUM"
							R_OPT="Auto"
							D_OPT="0.0"
							E_OPT="ca_aac"
						fi
					done < "$LANGSFILE"
					;;
			esac
			# Build final option string for non-empty audio tracks
			if [ ! -z $a_OPT ]; then
				a_OPT="-a ${a_OPT}"
				R_OPT="-R ${R_OPT}"
				D_OPT="-D ${D_OPT}"
				E_OPT="-E ${E_OPT}"
			fi
			rm -f "$LANGSFILE"
			echo ================
			echo "$PROG: Transcoding $TYPE title number $TN."
			echo "$PROG: HandbrakeCLI options: -Z $PRESET $a_OPT $R_OPT $D_OPT $E_OPT $SUBOPT -t $TN -i $SOURCE -o ${DEST}/${BASESOURCE}-t${TN}-${TYPE}.${EXT}"
			$HB -Z "$PRESET" -t $TN "$a_OPT" "$R_OPT" "$D_OPT" "$E_OPT" "$SUBOPT" -i "$SOURCE" -o "${DEST}/${BASESOURCE}-t${TN}-${TYPE}.${EXT}" 1> /dev/null
			echo "$PROG: Finished transcoding $TYPE title number $TN."
			echo ================
		done
		echo
		rm -f "$SCANFILE"
	done
fi

exit 0