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Recursive flac to mp3 converter, with CPU and file count limiter
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#!/bin/bash | |
# | |
# flac2mp3 | |
# | |
# Recursively converts flac files to mp3s. | |
# Doesn't delete flacs after conversion but skips them on next iteration. | |
# | |
# Bits stolen from https://wiki.archlinux.org/index.php/Convert_Flac_to_Mp3#Without_FFmpeg | |
# Requires packages: lame, flac, cpulimit | |
# | |
# Limit CPU usage to percentage | |
CPU_LIMIT=40 | |
# Limit amount of flacs to convert per run | |
MAX_CONVERT_COUNT=8 | |
# Set newline to be the default delimiter (for flac file lists) | |
IFS=$'\n' | |
# Start timer | |
TIME_STARTED=`date +%s` | |
# Check if script isn't already running | |
if [ "$(ps aux | grep flac2mp3.sh | wc -l)" -ge 2 ]; then | |
echo "Error: I'm already running" | |
exit 1 | |
fi | |
# Determine root directory using first parameter | |
ROOT_DIRECTORY="$1" | |
if [ ! -d "$ROOT_DIRECTORY" ]; then | |
echo "Usage: $0 flacdir" | |
exit 1 | |
fi | |
# Find flac files that have not yet been converted | |
FLACS_ALL=`find "$ROOT_DIRECTORY" -name "*.flac"` | |
FLACS= | |
for FLAC in $FLACS_ALL; do | |
if [ ! -f "${FLAC/%flac/mp3}" ]; then | |
FLACS="$FLACS$FLAC"$'\n' | |
fi | |
done | |
# Convert! | |
CONVERTED_COUNT=0 | |
for SOURCE_FILE in $FLACS; do | |
TARGET_FILE=${SOURCE_FILE/%flac/mp3} | |
# Get flac metadata tags | |
ARTIST=$(metaflac "$SOURCE_FILE" --show-tag=ARTIST | sed s/.*=//g) | |
TITLE=$(metaflac "$SOURCE_FILE" --show-tag=TITLE | sed s/.*=//g) | |
ALBUM=$(metaflac "$SOURCE_FILE" --show-tag=ALBUM | sed s/.*=//g) | |
GENRE=$(metaflac "$SOURCE_FILE" --show-tag=GENRE | sed s/.*=//g) | |
TRACKNUMBER=$(metaflac "$SOURCE_FILE" --show-tag=TRACKNUMBER | sed s/.*=//g) | |
DATE=$(metaflac "$SOURCE_FILE" --show-tag=DATE | sed s/.*=//g) | |
# Stream flac into the lame encoder | |
flac -s -c -d "$SOURCE_FILE" | lame --silent -V0 --add-id3v2 --pad-id3v2 --ignore-tag-errors \ | |
--ta "$ARTIST" --tt "$TITLE" --tl "$ALBUM" --tg "${GENRE:-12}" \ | |
--tn "${TRACKNUMBER:-0}" --ty "$DATE" - "$TARGET_FILE" & | |
# Limit CPU usage for lame | |
cpulimit -z -l $CPU_LIMIT -e lame > /dev/null 2>&1 | |
CONVERTED_COUNT=$((CONVERTED_COUNT+1)) | |
if [ $CONVERTED_COUNT -eq $MAX_CONVERT_COUNT ]; then | |
break; | |
fi | |
done | |
TIME_FINISHED=`date +%s` | |
TIME_ELAPSED=$((TIME_FINISHED-TIME_STARTED)) | |
echo "Converted $CONVERTED_COUNT flac(s) in $TIME_ELAPSED s" |
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