Hi, longtime lurker here.
First of all, I want to thank bryant, and I love wavpack, etc, etc.
A couple of months ago, I ran into a similiar problem the OP did. I then discovered GNU Parallel (as previously mentioned,) and wrote a shell script for batch encoding. I'll leave it here in case anyone would like to use it.
#! /bin/sh -
#
# WVBATCH - wavpack batch encode script
#
## CONSTANTS ##
readonly TRUE=0
export TRUE
readonly FALSE=1
export FALSE
## VARIABLES ##
export WAVPACK_OPTS="-hhx6"
export DELETE_INPUT=$FALSE
MAX_PROCS="100%"
### FUNCTIONS ##################################################################
print_help()
{
cat << EOF
WVBATCH - wavpack batch encode script
Usage:
wvbatch [options] <input.files>
Options:
-d)
delete all input files
(same as '-o "[other-options] -d"')
--help)
print this message
-j)
maximum number of processors to use ||
percentage of the available processors to use
(default = '100%')
e.g.)
-j 6
-j 40%
-o)
wavpack options
(default = '-hhx6'; '-qzymvr' is hardcoded)
e.g.)
-o -hx3b320c
-o "-hhx4 --raw-pcm=48000,16,6 --channel-order=FL,FR,FC,LFE,SL,SR"
Read the wavpack man page for all available options.
Dependencies:
1 WavPack
2 GNU Parallel
EOF
}
### TRAPS ######################################################################
trap '
printf "\naborting...\n" >&2
exit 255
' HUP INT QUIT ABRT KILL PIPE TERM
### GET OPTS ###################################################################
while [ $# -gt 0 ] ; do
case $1 in
-d)
DELETE_INPUT=$TRUE
shift
;;
--help)
print_help >&2
exit 1
;;
-j)
MAX_PROCS="$2"
shift 2
;;
-o)
WAVPACK_OPTS="$2"
shift 2
;;
--)
shift
break
;;
*)
break
;;
esac
done
if [ $# -eq 0 ] ; then
print_help >&2
exit 1
fi
if [ $DELETE_INPUT -eq $TRUE ] ; then
WAVPACK_OPTS="$WAVPACK_OPTS -d"
fi
### MAIN #######################################################################
wavpack 2>&1 | sed 4q >&2
parallel -j "$MAX_PROCS" '
TIME_START=$(date +%s.%N)
wavpack -qzymvr $WAVPACK_OPTS {}
EXIT_STATUS=$?
TIME_STOP=$(date +%s.%N)
case $EXIT_STATUS in
0)
TIME=$(echo "$TIME_STOP - $TIME_START" | bc)
OUTFILE={.}.wv
WVINFO="$(wvunpack -qzs "$OUTFILE")"
MD5_SIG="$(
echo "$WVINFO" |
grep -F "original md5:" |
sed "s/original md5:[[:space:]]*//"
)"
MODALITY=$(echo "$WVINFO" | grep -F "modalities:")
if echo "$MODALITY" | grep -Fq "lossless" ; then
if echo "$MODALITY" | grep -Fq "hybrid" ; then
HYBRID="(+.wvc) "
fi
COMP_TYPE="lossless"
COMP_STAT="$(
echo "$WVINFO" |
grep -F "compression:" |
sed "s/compression:[[:space:]]*//"
)"
else
COMP_TYPE="lossy"
COMP_STAT="$(
echo "$WVINFO" |
grep -F "ave bitrate:" |
sed "s/ave bitrate:[[:space:]]*//"
)"
fi
printf "%s:\n" {}
if [ $DELETE_INPUT -eq $TRUE ] ; then
printf "deleted source file %s\n" {}
fi
printf "original md5 signature: %s\n" "$MD5_SIG"
printf "created (and verified) %s %sin %.2f secs (%s, %s)\n" \
"$OUTFILE" "$HYBRID" $TIME "$COMP_TYPE" "$COMP_STAT"
printf "\n"
exit 0
;;
*)
# wavpack will print the error here
printf " \033[41m>>>\033[0m %s\n\n" {} >&2
exit $EXIT_STATUS
;;
esac
' ::: "$@"
EXIT_STATUS=$?
case $EXIT_STATUS in
0)
if [ $# -ne 1 ] ; then
printf " **** %d files successfully processed ****\n" $# >&2
fi
exit 0
;;
254)
printf " **** warning: errors occured in more than 253 of %d files! ****\n" $# >&2
exit 254
;;
255) # parallel error
exit 255
;;
*)
printf " **** warning: errors occured in %d of %d files! ****\n" $EXIT_STATUS $# >&2
exit $EXIT_STATUS
;;
esac
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