Gav's World : Text Viewer : scripts/flac_downto

File [scripts/flac_downto_128k.sh]

1	#!/bin/bash
2	#
3	# Convert all flac files to mp3 @ 128k using lame
4	#
5	# Thanks to http://blog.tordeu.com/?p=184 for snippets
6	#
7	if [ $1 ]; then
8	do_artist=$1
9	else
10	do_artist=""
11	fi
12	base_dir="${HOME}/Music"
13	high_dir="flac"
14	tmpy=/tmp/flac_downto_128k
15	bits_out=128
16	out_dir="mp3-${bits_out}kbit-resampled"
17	# Some stat counters
18	let n_artists=0
19	let n_albums=0
20	let n_tracks=0
21	let n_artists_r=0
22	let n_albums_r=0
23	let n_tracks_r=0
24	let n_artists_c=0
25	let n_albums_c=0
26	let n_tracks_c=0
27	last_artist=""
28	last_album=""
29	# Create a tmp directory for dumps
30	if [ ! -d "${tmpy}" ]; then
31	mkdir ${tmpy}
32	fi
33	# Scan through all of the high quality directories
34	for this_high_dir in ${high_dir}
35	do
36	# Scan for artists
37	echo "Scanning ${this_high_dir} directory ..."
38	ls -1 "${base_dir}/${this_high_dir}" > ${tmpy}/${this_high_dir}
39	# Scan for albums
40	while read artist
41	do
42	if [ "${do_artist}" = "" ] \|\| [ "${do_artist}" = "${artist}" ]; then
43	let n_artists=$n_artists+1
44	# Scan for tracks
45	echo " Found ${artist} - scanning for albums ..."
46	artist_clean=`echo ${artist//[ \[\]()&;\'\"\,\’:*?]/_} \| tr -s _ _ `
47	if [ "${artist}" != "${artist_clean}" ]; then
48	echo " Renaming ${artist} to ${artist_clean}"
49	mv "${base_dir}/${this_high_dir}/${artist}" "${base_dir}/${this_high_dir}/${artist_clean}"
50	artist=${artist_clean}
51	let n_artists_r=$n_artists_r+1
52	fi
53	ls -1 "${base_dir}/${this_high_dir}/${artist}" > ${tmpy}/${this_high_dir}-${artist}
54	while read album
55	do
56	let n_albums=$n_albums+1
57	echo " Found ${album} - scanning for tracks ..."
58	album_clean=`echo ${album//[ \[\]()&;\'\"\,\’:*?]/_} \| tr -s _ _ `
59	if [ "${album}" != "${album_clean}" ]; then
60	echo " Renaming ${album} to ${album_clean}"
61	mv "${base_dir}/${this_high_dir}/${artist}/${album}" "${base_dir}/${this_high_dir}/${artist}/${album_clean}"
62	album=${album_clean}
63	let n_albums_r=$n_albums_r+1
64	fi
65	ls -1 "${base_dir}/${this_high_dir}/${artist}/${album}" > ${tmpy}/${this_high_dir}-${artist}-${album}
66	# Now the fun bit ... let's start re-encoding the track we've just found
67	while read track
68	do
69	track_clean=`echo ${track//[ \[\]()&;\'\"\,\’:*?]/_} \| tr -s _ _ `
70	if [ "${track}" != "${track_clean}" ]; then
71	echo " Renaming ${track} to ${track_clean}"
72	mv "${base_dir}/${this_high_dir}/${artist}/${album}/${track}" "${base_dir}/${this_high_dir}/${artist}/${album}/${track_clean}"
73	track=${track_clean}
74	let n_tracks_r=$n_tracks_r+1
75	fi
76	this_source="${base_dir}/${this_high_dir}/${artist}/${album}/${track}"
77	this_dest=`echo ${base_dir}/${out_dir}/${artist}/${album}/${track} \| sed 's/.flac/.mp3/g'`
78	# Check that it's a FLAC file
79	if [ `file "${this_source}" \| grep -c "FLAC audio bitstream data"` = "1" ]; then
80	let n_tracks=$n_tracks+1
81	# Check the datestamps
82	source_date=`stat -c %Y "${this_source}"`
83	if [ -f "${this_dest}" ]; then
84	dest_date=`stat -c %Y "${this_dest}"`
85	else
86	dest_date=0
87	fi
88	# Only encode or copy if dest is older than source
89	if [ ${dest_date} -lt ${source_date} ]; then
90	##############################################
91	# Time to do what we were sent here to do!!! #
92	##############################################
93	# Get tag data from source.
94	# Artist
95	s_artist=`metaflac --show-tag=ARTIST "${this_source}" \| awk -F "=" '{print $2}'`
96	# Album
97	s_album=`metaflac --show-tag=ALBUM "${this_source}" \| awk -F "=" '{print $2}'`
98	# Track title
99	s_track=`metaflac --show-tag=TITLE "${this_source}" \| awk -F "=" '{print $2}'`
100	# Genre
101	s_genre=`metaflac --show-tag=GENRE "${this_source}" \| awk -F "=" '{print $2}'`
102	# Year
103	s_year=`metaflac --show-tag=DATE "${this_source}" \| awk -F "=" '{print $2}' \| awk -F "-" '{print $1}'`
104	# Track number
105	s_track_no=`metaflac --show-tag=TRACKNUMBER "${this_source}" \| awk -F "=" '{print $2}'`
106	if [ `expr length "$s_track_no"` -eq 1 ]; then
107	s_track_no="0${s_track_no}"
108	fi
109	d_args="--ta \"${s_artist}\" --tg \"${s_genre}\" --tl \"${s_album}\""
110	d_args="${d_args} --tn \"${s_track_no}\" --tt \"${s_track}\""
111	if [ ! ${s_year} = "" ]; then
112	d_args="${d_args} --ty \"${s_year}\""
113	fi
114	# Create the directory if it doesn't exist
115	if [ ! -d "${base_dir}/${out_dir}/${artist}/${album}" ]; then
116	mkdir -p "${base_dir}/${out_dir}/${artist}/${album}"
117	fi
118	# Now re-encode
119	echo " Re-encoding ${track} (to mp3-${bits_out}kbit)"
120	#echo "flac -c -d \"${this_source}\" 2>/dev/null \| lame -B 128 -V 4 ${d_args} - \"${this_dest}\" 2>/dev/null"
121	eval "flac -c -d \"${this_source}\" 2>/dev/null \| lame -B 128 -V 4 ${d_args} - \"${this_dest}\" 2>/dev/null"
122	let n_tracks_c=$n_tracks_c+1
123	if [ "${artist}" != "${last_artist}" ]; then
124	let n_artists_c=$n_artists_c+1
125	fi
126	if [ "${album}" != "${last_album}" ]; then
127	let n_albums_c=$n_albums_c+1
128	fi
129	last_artist=${artist}
130	last_album=${album}
131	##########################
132	# Wasn't that simple?!?! #
133	##########################
134	else
135	echo " Skipping ${track} (file up-to-date)"
136	fi
137	else
138	# Not a flac, so just copy (if not already up-to-date)
139	# Check the datestamps
140	source_date=`stat -c %Y "${this_source}"`
141	if [ -f "${this_dest}" ]; then
142	dest_date=`stat -c %Y "${this_dest}"`
143	else
144	dest_date=0
145	fi
146	# Copy or skip?
147	if [ ${dest_date} -lt ${source_date} ]; then
148	# Create the directory if it doesn't exist
149	if [ ! -d "${base_dir}/${out_dir}/${artist}/${album}" ]; then
150	mkdir -p "${base_dir}/${out_dir}/${artist}/${album}"
151	fi
152	echo " Copying ${track} as not a flac"
153	cp "${this_source}" "${this_dest}"
154	else
155	echo " Skipping ${track} (file up-to-date)"
156	fi
157	fi
158	done <${tmpy}/${this_high_dir}-${artist}-${album}
159	done <${tmpy}/${this_high_dir}-${artist}
160	fi
161	done <${tmpy}/${this_high_dir}
162	done
163	echo ""
164	echo "Found ${n_tracks} tracks in ${n_albums} albums from ${n_artists} artists"
165	echo "Renamed ${n_tracks_r} tracks, ${n_albums_r} albums and ${n_artists_r} artists"
166	echo "Converted ${n_tracks_c} tracks in ${n_albums_c} albums from ${n_artists_c} artists"
167	echo ""
168	# Now clean up the tmp area
169	""rm -f -R ${tmpy}