bash/lame-recoder/lamer.bash

   1 #!/bin/bash
   2 #Copylefted by: Harvie 2o1o
   3 version='1.1';
   4 filetypes='(mp3|wav|wma)$'; #regex
   5 quality="$1"; #passed to lame as --preset argument
   6 outdir="_lame-encoded-preset-"; #preset name will be attached - needs to be regex compatible string
   7
   8 #guess count of CPU cores
   9 cpus=1;
  10 cpusguess=$(grep 'processor.:' /proc/cpuinfo 2>/dev/null | wc -l);
  11 [ "$cpusguess" -ge 1 ] 2>/dev/null && cpus="$cpusguess"
  12 [ "$2" -ge 1 ] 2>/dev/null && cpus="$2"
  13
  14 lamelog='/dev/null'
  15 [ "$cpus" -eq 1 ] && lamelog='/dev/stdout'
  16
  17 [ -z "$1" ] && {
  18 echo -e "lame-recursive v$version (Harvie 2o1o)
  19
  20         (Re-)Encode all '$filetypes' files in current directory and (sub-directories)
  21         - This will NOT touch the original files.
  22         - This will only create new files in ${outdir}PRESET directory in each
  23           sub-directory, where PRESET will be substitued by selected lame preset.
  24         - Files in such directories will be ignored
  25         - Once encoded file will be overwriten only if it's older than original file
  26         - Requires working lame binary
  27         - Supports multiple CPUs/cores
  28
  29         Usage:          $0 [preset] [cpu-cores]
  30         Example:        cd ~/music;     $0 standart
  31         Example:        cd ~/spoken;    $0 voice
  32
  33 presets:
  34         VBR: voice, medium, standart, extreme, insane (= 320kbps CBR)
  35         ABR: 8, 16, 32, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320
  36         For more info:  lame --preset help
  37
  38 cpu-cores:
  39         You probably have $cpusguess CPU cores, i will use this value by default
  40         Anyway... You can try any value higher than 0
  41         (does not affect sound quality, probably you don't need to change this)
  42
  43 tips & tricks:
  44         - to quickly visualy check if all files were recoded:
  45           ls -R1 . | sort | less
  46 "
  47 exit;
  48 }
  49
  50 encode() {
  51         tsign() { echo -ne "[$$]\t"; echo "$@"; }
  52         temp=$(mktemp)
  53         cleanup() {
  54                 last=$(cat "$temp");
  55                 echo -ne "\n[$$] Terminated. Deleting incomplete file:\n\t"
  56                 echo "$last"
  57                 rm -f "$last";
  58                 rm -rf "$temp";
  59                 exit;
  60         }
  61         trap cleanup SIGINT SIGTERM SIGHUP SIGPIPE SIGQUIT SIGKILL;
  62
  63
  64         infile="$1"
  65         cd "${infile%/*}";
  66         outdir="${outdir}${quality}"
  67         [[ -d "$outdir" ]] || {
  68                 echo "==> Creating directory: $(pwd)/$outdir";
  69                 mkdir -p "$outdir";
  70         }
  71         infile="${infile##*/}";
  72         outfile="$outdir/${infile##*/}";
  73
  74         [ "$outfile" -nt "$infile" ] && {
  75                 tsign "Output file is newer than input file: $(pwd)/$outfile";
  76                 exit;
  77         }
  78
  79         echo "$(pwd)/$outfile" > "$temp"
  80         tsign "Encoding: '$infile'";
  81         lame --preset "$quality" "$infile" "$outfile" >"$lamelog" 2>&1
  82         tsign "    Done: '$infile'; retval=$?";
  83 }
  84
  85 echo "==> I will use $cpus CPU cores";
  86 export -f encode; export quality outdir lamelog
  87 find -regextype posix-egrep -iregex '.*'"$filetypes" | grep -v /"$outdir" | tr '\r\n' '\0\0' | xargs -0 -n 1 -P "$cpus" bash -c 'encode "$@"' --
  88 echo '
  89
  90 ==> All files were processed.
  91 ==> But you should rather check them before deleting the originals...
  92 ==> Thank you for using lame-recursive by Harvie ( http://blog.harvie.cz/ )'