I think I haven’t used mood files generation since I’ve switched to Clementine as my primary music player and configured BitTorrent Sync of my music between 3 PCs I’m using the most frequently… This setup seems to only have minor drawbacks, and lots of benefits – including in-file storage of rating, score, play and skip counts, so that every separate Clementine instance will be aware of updates made on other PCs.

Somehow this code was not included in my previous comment. it goes just above the “fi” at the end of the script


#!/bin/bash -

# This program creates moodbar files for use with Amarok. It is designed for
# multi-core processors, but will also run on single-core processors. This is
# a modified version of the script offered on KDE's website. Changes in this
# version include using $HOME/Music by default unless a different directory is
# specified on the command line, changing $NUMCPU to $NUMTHREADS, using one-
# less core than is installed in the system, and launching moodbar using nice.
# I found that the version on KDE's site pegged all 8 cores in my CPU and
# locked up my computer after a time while using very little of the 32GB of
# installed RAM. Additionally, I included several more filename extensions to
# the regex in the find command line.
#
# This version is designed to be run from a cron job. Mine is set up to run
# once per week. This version also checks to ensure that moodbar is installed.
#
# On dual-core and single-core processors this program will run one instance
# of moodbar. Effectively, only quad-core, or higher, processors will be used
# with multiple threads of execution. Moodbar is very CPU-intensive. Nice is
# about all that can be done to hold it back on single-core CPUs. On dual-
# core, and higher, CPUs, one core is held in reserve for other tasks as an
# additional measure.
if ! which moodbar &>/dev/null; then
echo 'moodbar must be installed to use this program'
exit 1
fi
MUSIC=${1:-$HOME/Music}
if [[ -d $MUSIC ]]; then
cd $MUSIC
else
echo "$MUSIC is not a directory or does not exist"
exit 1
fi
NUMTHREADS=$(( $(grep ^processor /proc/cpuinfo | wc -l) - 1 ))
[[ $NUMTHREADS -gt 0 ]] || NUMTHREADS=1
find . -type f -regextype posix-awk \
-iregex '.*\.(wav|mp3|ogg|oga|flac|fla|wma|aiff|aac|m4a)' | \
while read i ; do
while [[ $(jobs -p | wc -l) -ge $NUMTHREADS ]] ; do
sleep 0.1
done
TEMP="${i%.*}.mood"
OUTF=$(sed 's#\(.*\)/\([^,]*\)#\1/.\2#' <</dev/null &
fi
done