Extracts locators from an Ableton ALS file and moves them by a specified time offset. (Useful when merging Live projects.)

extract_locators.sh

#!/bin/bash

ALS=$1
export TIME_VALUE_OFFSET=$2
export ID_OFFSET=$3


if [ "$ALS" == ""  -o "$TIME_VALUE_OFFSET" == "" -o "$ID_OFFSET" == "" ]; then
	echo "$0 <liveset.als> <locator time offset (bars)> <locator ID offset>"
	exit
fi


if [ ! -f $ALS ]; then
	echo "$ALS not found"
	exit 1
fi

gzip -cd $ALS | \
xmllint --xpath  '/Ableton/LiveSet/Locators/Locators' - | \
perl -n -e 'if(/Time Value="(\d+)"\//){ $val=($1+(($ENV{TIME_VALUE_OFFSET}+0)*4)); print "             <Time Value=\"$val\"/>\n"} elsif(/<Locator Id="(\d+)">/){ $id=($1+($ENV{ID_OFFSET})); print "             <Locator Id=\"$id\">\n" } else { print $_ }' | \
	xmllint --format -

echo
echo