scripts/aconv

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2024-05-03 17:59:07 +00:00
#!/bin/sh
ACONV_OUTDIR="./converted"
ACONV_CODEC="libopus"
ACONV_BITRATE="128k"
ACONV_CONTAINER="ogg"
ACONV_QUIET=0
ACONV_THREADS=$(nproc --ignore=2)
chk_command() {
if ! command -v "$1" > /dev/null; then
>&2 echo "error: command '$1' could not be found"
exit 1
fi
}
chk_command "ffmpeg"
chk_command "getopts"
chk_command "parallel"
chk_command "find"
usage() {
printf "usage: aconv [-hs] [options] dir\n"
}
help() {
printf "usage: aconv [-hs] [options] dir\n\n"
printf "\t-h\t\tprint this message\n"
printf "\t-q\t\tset quiet output (only errors)\n"
printf "\t-o OUTDIR\tset the output directory\n"
printf "\t-c CODEC\tset the output codec\n"
printf "\t-C CONTAINER\tset the output container\n"
printf "\t-b BITRATE\tset the output bitrate\n"
printf "\t-j THREADS\tset the number of threads (default all but 2)\n"
}
while getopts "hqo:c:C:b:j:" arg > /dev/null; do
case $arg in
h)
help
exit 0
;;
q)
ACONV_QUIET=1
;;
o)
ACONV_OUTDIR=${OPTARG}
;;
c)
ACONV_CODEC=${OPTARG}
;;
C)
ACONV_CONTAINER=${OPTARG}
;;
b)
ACONV_BITRATE=${OPTARG}
;;
j)
ACONV_THREADS=${OPTARG}
;;
?)
>&2 echo "error: unknown option"
usage
exit 1
;;
esac;
done;
ACONV_DIR=${@:$OPTIND:1}
if [ "$ACONV_DIR" = "" ]; then
usage
exit 1
fi
if [ ! -d "$ACONV_DIR" ]; then
>&2 echo "error: input directory '$ACONV_DIR' does not exist"
exit 1
fi
convert_file() {
# get arguments
file="$1"
ext="$2"
name=${file%.*};
# print log
if [ "$ACONV_QUIET" -eq 0 ]; then
printf "\x1b[34m CONV \x1b[0m%s\n" "$ACONV_OUTDIR/$name.$ACONV_CONTAINER"
fi
# do the thing
ffmpeg -nostdin -y -i "$file" -c:a "$ACONV_CODEC" -b:a "$ACONV_BITRATE" "$ACONV_OUTDIR/$name.$ACONV_CONTAINER" -loglevel fatal
}
export ACONV_OUTDIR
export ACONV_CODEC
export ACONV_BITRATE
export ACONV_CONTAINER
export ACONV_QUIET
export ACONV_THREADS
export -f convert_file
convert_type() {
# get arguments
dir="$1"
ext="$2"
# convert the files
find "$dir" -type f -name "*.$ext" | parallel -j "$ACONV_THREADS" convert_file "{}" "$ext"
}
convert_dir() {
# get arguments
dir="$1"
# make the output dirs
find "$dir" -type d -print0 |xargs -0 -I{} mkdir -p "$ACONV_OUTDIR/{}"
# convert the things
convert_type "$dir" "mp3"
convert_type "$dir" "m4a"
convert_type "$dir" "ogg"
convert_type "$dir" "flac"
convert_type "$dir" "wav"
convert_type "$dir" "avif"
}
# do the thing
convert_dir "$ACONV_DIR"