要在Mac上使用@meridius的解决方案，我必须做一些额外的工作，并稍微修改一下脚本：
# Let's install bpm-tools
git clone http://www.pogo.org.uk/~mark/bpm-tools.git
cd bpm-tools
make && make install
# There will be errors, but they did not affect the result
# The following three lines could be replaced by including this directory in your $PATH
ln -s <absolute path to bpm-tools>/bpm /usr/local/bin/bpm
ln -s <absolute path to bpm-tools>/bpm-tag /usr/local/bin/bpm-tag
ln -s <absolute path to bpm-tools>/bpm-graph /usr/local/bin/bpm-graph
cd ..
# Time to install a bunch of GNU tools
# Not all of these packages are strictly necessary for this script, but I decided I wanted the whole GNU toolchain in order to avoid this song-and-dance in the future
brew install coreutils findutils gnu-tar gnu-sed gawk gnutls gnu-indent gnu-getopt bash flac vorbis-tools
brew tap homebrew/dupes; brew install grep
# Now for Mutagen (contains mid3v2)
git clone https://github.com/nex3/mutagen.git
cd mutagen
./setup.py build
sudo ./setup.py install
# There will be errors, but they did not affect the result
cd ..
然后，我不得不修改脚本以指向所有内容的GNU版本，以及其他一些调整：
#!/usr/local/bin/bash
# ================================= FUNCTIONS =================================
function help() {
less <<< 'BPMWRAP
Description:
This BASH script is a wrapper for bpm-tag utility of bpm-tools and several
audio tagging utilities. The purpose is to make BPM (beats per minute)
tagging as easy as possible.
Default behaviour is to look through working directory for *.mp3 files
and compute and print their BPM in the following manner:
[current (if any)] [computed] [filename]
Usage:
bpmwrap [options] [directory or filenames]
Options:
You can specify files to process by one of these ways:
1) state files and/or directories containing them after options
2) specify --import file
3) specify --input file
With either way you still can filter the resulting list using --type option(s).
Remember that the script will process only mp3 files by default, unless
specified otherwise!
-i, --import file
Use this option to set BPM tag for all files in given file instead of
computing it. Expected format of every row is BPM number and absolute path
to filename separated by semicolon like so:
145;/home/trinity/music/Apocalyptica/07 beyond time.mp3
Remember to use --write option too.
-n, --input file
Use this option to give the script list of FILES to process INSTEAD of paths
where to look for them. Each row whould have one absolute path.
This will bypass the searching part and is that way useful when you want
to process large number of files several times. Like when you are not yet
sure what BPM limits to set. Extension filtering will still work.
-o, --output file
Save output also to a file.
-l, --list-save file
Save list of files about to get processed. You can use this list later
as a file for --input option.
-t, --type filetype
Extension of file type to work with. Defaults to mp3. Can be specified
multiple times for more filetypes. Currently supported are mp3 ogg flac.
-e, --existing-only
Only show BPM for files that have it. Do NOT compute new one.
-w, --write
Write computed BPM to audio file but do NOT overwrite existing value.
-f, --force
Write computed BPM to audio file even if it already has one. Aplicable only
with --write option.
-m, --min minbpm
Set minimal BPM to look for when computing. Defaults to bpm-tag minimum 84.
-x, --max maxbpm
Set maximal BPM to look for when computing. Defaults to bpm-tag maximum 146.
-v, --verbose
Show "progress" messages.
-c, --csv-friendly
Use semicolon (;) instead of space to separate output columns.
-h, --help
Show this help.
Note:
Program bpm-tag (on whis is this script based) is looking only for lowercase
file extensions. If you get 0 (zero) BPM, this should be the case. So just
rename the file.
License:
GPL V2
Links:
bpm-tools (http://www.pogo.org.uk/~mark/bpm-tools/)
Dependencies:
bpm-tag mid3v2 vorbiscomment metaflac
Author:
Martin Lukeš (martin.meridius@gmail.com)
Based on work of kolypto (http://superuser.com/a/129157/137326)
'
}
# Usage: result=$(inArray $needle haystack[@])
# @param string needle
# @param array haystack
# @returns int (1 = NOT / 0 = IS) in array
function inArray() {
needle="$1"
haystack=("${!2}")
out=1
for e in "${haystack[@]}" ; do
if [[ "$e" = "$needle" ]] ; then
out=0
break
fi
done
echo $out
}
# Usage: result=$(implode $separator array[@])
# @param char separator
# @param array array to implode
# @returns string separated array elements
function implode() {
separator="$1"
array=("${!2}")
IFSORIG=$IFS
IFS="$separator"
echo "${array[*]}"
IFS=$IFSORIG
}
# @param string file
# @returns int BPM value
function getBpm() {
local file="$1"
local ext="${file##*.}"
declare -l ext # convert to lowercase
{ case "$ext" in
'mp3') mid3v2 -l "$file" ;;
'ogg') vorbiscomment -l "$file" ;;
'flac') metaflac --export-tags-to=- "$file" ;;
esac ; } | fgrep 'BPM=' -a | cut -d'=' -f2
}
# @param string file
# @param int BPM value
function setBpm() {
local file="$1"
local bpm="${2%%.*}"
local ext="${file##*.}"
declare -l ext # convert to lowercase
case "$ext" in
'mp3') mid3v2 --TBPM "$bpm" "$file" ;;
'ogg') vorbiscomment -a -t "BPM=$bpm" "$file" ;;
'flac') metaflac --set-tag="BPM=$bpm" "$file"
mid3v2 --TBPM "$bpm" "$file" # Need to store to ID3 as well :(
;;
esac
}
# # @param string file
# # @returns int BPM value
function computeBpm() {
local file="$1"
local m_opt=""
[ ! -z "$m" ] && m_opt="-m $m"
local x_opt=""
[ ! -z "$x" ] && x_opt="-x $x"
local row=$(bpm-tag -fn $m_opt $x_opt "$file" 2>&1 | fgrep "$file")
echo $(echo "$row" \
| gsed -r 's/.+ ([0-9]+\.[0-9]{3}) BPM/\1/' \
| gawk '{printf("%.0f\n", $1)}')
}
# @param string file
# @param int file number
# @param int BPM from file list given by --import option
function oneThread() {
local file="$1"
local filenumber="$2"
local bpm_hard="$3"
local bpm_old=$(getBpm "$file")
[ -z "$bpm_old" ] && bpm_old="NONE"
if [ "$e" ] ; then # only show existing
myEcho "$filenumber/$NUMFILES${SEP}$bpm_old${SEP}$file"
else # compute new one
if [ "$bpm_hard" ] ; then
local bpm_new="$bpm_hard"
else
local bpm_new=$(computeBpm "$file")
fi
[ "$w" ] && { # write new one
if [[ ! ( ("$bpm_old" != "NONE") && ( -z "$f" ) ) ]] ; then
setBpm "$file" "$bpm_new"
else
[ "$v" ] && myEcho "Non-empty old BPM value, skipping ..."
fi
}
myEcho "$filenumber/$NUMFILES${SEP}$bpm_old${SEP}$bpm_new${SEP}$file"
fi
}
function myEcho() {
[ "$o" ] && echo -e "$1" >> "$o"
echo -e "$1"
}
# ================================== OPTIONS ==================================
eval set -- $(/usr/local/Cellar/gnu-getopt/1.1.6/bin/getopt -n $0 -o "-i:n:o:l:t:ewfm:x:vch" \
-l "import:,input:,output:,list-save:,type:,existing-only,write,force,min:,max:,verbose,csv-friendly,help" -- "$@")
declare i n o l t e w f m x v c h
declare -a INPUTFILES
declare -a INPUTTYPES
while [ $# -gt 0 ] ; do
case "$1" in
-i|--import) shift ; i="$1" ; shift ;;
-n|--input) shift ; n="$1" ; shift ;;
-o|--output) shift ; o="$1" ; shift ;;
-l|--list-save) shift ; l="$1" ; shift ;;
-t|--type) shift ; INPUTTYPES=("${INPUTTYPES[@]}" "$1") ; shift ;;
-e|--existing-only) e=1 ; shift ;;
-w|--write) w=1 ; shift ;;
-f|--force) f=1 ; shift ;;
-m|--min) shift ; m="$1" ; shift ;;
-x|--max) shift ; x="$1" ; shift ;;
-v|--verbose) v=1 ; shift ;;
-c|--csv-friendly) c=1 ; shift ;;
-h|--help) h=1 ; shift ;;
--) shift ;;
-*) echo "bad option '$1'" ; exit 1 ;; #FIXME why this exit isn't fired?
*) INPUTFILES=("${INPUTFILES[@]}" "$1") ; shift ;;
esac
done
# ================================= DEFAULTS ==================================
#NOTE Remove what requisities you don't need but don't try to use them after!
# always mp3/flac ogg flac
REQUIRES="bpm-tag mid3v2 vorbiscomment metaflac"
which $REQUIRES > /dev/null || { myEcho "These binaries are required: $REQUIRES" >&2 ; exit 1; }
[ "$h" ] && {
help
exit 0
}
[[ $m && $x && ( $m -ge $x ) ]] && {
myEcho "Minimal BPM can't be bigger than NOR same as maximal BPM!"
exit 1
}
[[ "$i" && "$n" ]] && {
echo "You cannot specify both -i and -n options!"
exit 1
}
[[ "$i" && ( "$m" || "$x" ) ]] && {
echo "You cannot use -m nor -x option with -i option!"
exit 1
}
[ "$e" ] && {
[[ "$w" || "$f" ]] && {
echo "With -e option you don't have any value to write!"
exit 1
}
[[ "$m" || "$x" ]] && {
echo "With -e option you don't have any value to count!"
exit 1
}
}
for file in "$o" "$l" ; do
if [ -f "$file" ] ; then
while true ; do
read -n1 -p "Do you want to overwrite existing file ${file}? (Y/n): " key
case "$key" in
y|Y|"") echo "" > "$file" ; break ;;
n|N) exit 0 ;;
esac
echo ""
done
echo ""
fi
done
[ ${#INPUTTYPES} -eq 0 ] && INPUTTYPES=("mp3")
# NUMCPU="$(ggrep ^processor /proc/cpuinfo | wc -l)"
NUMCPU="$(sysctl -a | ggrep machdep.cpu.core_count | gsed -r 's/(.*)([0-9]+)(.*)/\2/')"
LASTPID=0
TYPESALLOWED=("mp3" "ogg" "flac")
# declare -A BPMIMPORT # array of BPMs from --import file, keys are file names
declare -A BPMIMPORT # array of BPMs from --import file, keys are file names
for type in "${INPUTTYPES[@]}" ; do
[[ $(inArray $type TYPESALLOWED[@]) -eq 1 ]] && {
myEcho "Filetype $type is not one of allowed types (${TYPESALLOWED[@]})!"
exit 1
}
done
### here are three ways how to pass files to the script...
if [ "$i" ] ; then # just parse given file list and set BPM to listed files
if [ -f "$i" ] ; then
# myEcho "Setting BPM tags from given file ..."
while read row ; do
bpm="${row%%;*}"
file="${row#*;}"
ext="${file##*.}"
ext="${ext,,}" # convert to lowercase
if [ -f "$file" ] ; then
if [ $(inArray $ext INPUTTYPES[@]) -eq 0 ] ; then
FILES=("${FILES[@]}" "$file")
BPMIMPORT["$file"]="$bpm"
else
myEcho "Skipping file on row $rownumber (unwanted filetype $ext) ... $file"
fi
else
myEcho "Skipping non-existing file $file"
fi
done < "$i"
else
myEcho "Given import file does not exists!"
exit 1
fi
elif [ "$n" ] ; then # get files from file list
if [ -f "$n" ] ; then
rownumber=1
while read file ; do
if [ -f "$file" ] ; then
ext="${file##*.}"
ext="${ext,,}" # convert to lowercase
if [ $(inArray $ext INPUTTYPES[@]) -eq 0 ] ; then
FILES=("${FILES[@]}" "$file")
else
myEcho "Skipping file on row $rownumber (unwanted filetype $ext) ... $file"
fi
else
myEcho "Skipping file on row $rownumber (non-existing) ... $file"
fi
let rownumber++
done < "$n"
unset rownumber
else
myEcho "Given input file $n does not exists!"
exit 1
fi
else # get files from given parameters
[ ${#INPUTFILES[@]} -eq 0 ] && INPUTFILES=`pwd`
for file in "${INPUTFILES[@]}" ; do
[ ! -e "$file" ] && {
myEcho "File or directory $file does not exist!"
exit 1
}
done
impl_types=`implode "|" INPUTTYPES[@]`
while read file ; do
echo -ne "Creating list of files ... (${#FILES[@]}) ${file}\033[0K"\\r
FILES=("${FILES[@]}" "$file")
done < <(gfind "${INPUTFILES[@]}" -type f -regextype posix-awk -iregex ".*\.($impl_types)")
echo -e "Counted ${#FILES[@]} files\033[0K"\\r
fi
[ "$l" ] && printf '%s\n' "${FILES[@]}" > "$l"
NUMFILES=${#FILES[@]}
FILENUMBER=1
[ $NUMFILES -eq 0 ] && {
myEcho "There are no ${INPUTTYPES[@]} files in given files/paths."
exit 1
}
declare SEP=" "
[ "$c" ] && SEP=";"
# =============================== MAIN SECTION ================================
if [ "$e" ] ; then # what heading to show
myEcho "num${SEP}old${SEP}filename"
else
myEcho "num${SEP}old${SEP}new${SEP}filename"
fi
for file in "${FILES[@]}" ; do
[ `jobs -p | wc -l` -ge $NUMCPU ] && wait
[ "$v" ] && myEcho "Parsing (${FILENUMBER}/${NUMFILES})\t$file ..."
oneThread "$file" "$FILENUMBER" "${BPMIMPORT[$file]}" &
LASTPID="$!"
let FILENUMBER++
done
[ "$v" ] && myEcho "Waiting for last process ..."
wait $LASTPID
[ "$v" ] && myEcho \\n"DONE"
感谢您的辛勤工作@kolypto和@meridius。
...我为维护CLI工作流程而付出的辛苦，不花钱购买音乐工具...