raw2jpg.sh

#!/bin/env bash
#
# Parallel recursive RAW to JPEG + meta converter
#
# Output into relative JPEG directory
#
# Requires: dcraw, cjpeg, exiv2

# any argument means verbose...
if [ ${#} -ne 0 ]; then
        VERBOSE=1
else
        VERBOSE=0
fi

CPU_COUNT=$(getconf _NPROCESSORS_ONLN)
RUNNINGJOBS=0
find . -type f -iregex ".*\.\(ARW\|CR2\|CRW\|DCR\|DNG\|FPX\|MRW\|NEF\|ORF\|PCD\|PTX\|RAF\|RAW\|RW2\)$" -print0 | while IFS= read -r -d $'\0' line; do
        FILENAME="${line##*/}"
        FILENAME="${FILENAME%.*}"
        JPEGNAME="${FILENAME}.JPG"
        INPATH="${line%/*}"
        OUTPATH="${INPATH}/JPEG"
        OUTFILE="${OUTPATH}/${JPEGNAME}"

        if [ ! -d "${OUTPATH}" ]; then
                mkdir -p "${OUTPATH}"
        fi

        if [ -s ${OUTFILE} ]; then
                continue
        fi

        ( \
                dcraw -a -c "$line" | \
                cjpeg -quality 95 -optimize -progressive > "${OUTFILE}" && \
                exiv2 ex "$line" && \
                mv "${INPATH}/${FILENAME}.exv" "${OUTPATH}/" && \
                exiv2 in "${OUTFILE}" && \
                rm "${OUTPATH}/${FILENAME}.exv" && \
                exiv2 -T mv "${OUTFILE}" \
        ) &
        RUNNINGJOBS=$(( $RUNNINGJOBS+1 ))
        if [ "$VERBOSE" -ne 1 ]; then
                echo -n "$RUNNINGJOBS"
        else
                printf "${line}\t->\t${OUTFILE}\n"
        fi

        [ "$VERBOSE" -ne 1 ] && echo -n "."

        if [ "$RUNNINGJOBS" -eq "$CPU_COUNT" ]; then
                wait
                RUNNINGJOBS=0
        fi
done