flacはwavと同様に音質が無劣化でありながらタグ情報を付与できる。
対象環境
- Raspberry Pi 3 Model B+
- Raspbian stretch 2018-06-27
前提
参考
手順
$ sudo apt install flac
パッケージリストを読み込んでいます... 完了 依存関係ツリーを作成しています 状態情報を読み取っています... 完了 以下のパッケージが新たにインストールされます: flac アップグレード: 0 個、新規インストール: 1 個、削除: 0 個、保留: 0 個。 141 kB のアーカイブを取得する必要があります。 この操作後に追加で 398 kB のディスク容量が消費されます。 取得:1 http://ftp.jaist.ac.jp/raspbian stretch/main armhf flac armhf 1.3.2-1 [141 kB] 141 kB を 0秒 で取得しました (435 kB/s)
バージョン確認
$ flac -v flac 1.3.2
ヘルプ
$ flac -h =============================================================================== flac - Command-line FLAC encoder/decoder version 1.3.2 Copyright (C) 2000-2009 Josh Coalson Copyright (C) 2011-2016 Xiph.Org Foundation This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. =============================================================================== Usage: Encoding: flac [<general-options>] [<encoding/format-options>] [INPUTFILE [...]] Decoding: flac -d [<general-options>] [<format-options>] [FLACFILE [...]] Testing: flac -t [<general-options>] [FLACFILE [...]] Analyzing: flac -a [<general-options>] [<analysis-options>] [FLACFILE [...]] Be sure to read the list of known bugs at: http://xiph.org/flac/documentation_bugs.html general options: -v, --version Show the flac version number -h, --help Show this screen -H, --explain Show detailed explanation of usage and options -d, --decode Decode (the default behavior is to encode) -t, --test Same as -d except no decoded file is written -a, --analyze Same as -d except an analysis file is written -c, --stdout Write output to stdout -s, --silent Do not write runtime encode/decode statistics --totally-silent Do not print anything, including errors --no-utf8-convert Do not convert tags from local charset to UTF-8 -w, --warnings-as-errors Treat all warnings as errors -f, --force Force overwriting of output files -o, --output-name=FILENAME Force the output file name --output-prefix=STRING Prepend STRING to output names --delete-input-file Deletes after a successful encode/decode --preserve-modtime Output files keep timestamp of input (default) --keep-foreign-metadata Save/restore WAVE or AIFF non-audio chunks --skip={#|mm:ss.ss} Skip the given initial samples for each input --until={#|[+|-]mm:ss.ss} Stop at the given sample for each input file --ogg Use Ogg as transport layer --serial-number Serial number to use for the FLAC stream analysis options: --residual-text Include residual signal in text output --residual-gnuplot Generate gnuplot files of residual distribution decoding options: -F, --decode-through-errors Continue decoding through stream errors --cue=[#.#][-[#.#]] Set the beginning and ending cuepoints to decode encoding options: -V, --verify Verify a correct encoding --lax Allow encoder to generate non-Subset files --ignore-chunk-sizes Ignore data chunk sizes in WAVE/AIFF files --sector-align (DEPRECATED) Align multiple files on sector boundaries --replay-gain Calculate ReplayGain & store in FLAC tags --cuesheet=FILENAME Import cuesheet and store in CUESHEET block --picture=SPECIFICATION Import picture and store in PICTURE block -T, --tag=FIELD=VALUE Add a FLAC tag; may appear multiple times --tag-from-file=FIELD=FILENAME Like --tag but gets value from file -S, --seekpoint={#|X|#x|#s} Add seek point(s) -P, --padding=# Write a PADDING block of length # -0, --compression-level-0, --fast Synonymous with -l 0 -b 1152 -r 3 -1, --compression-level-1 Synonymous with -l 0 -b 1152 -M -r 3 -2, --compression-level-2 Synonymous with -l 0 -b 1152 -m -r 3 -3, --compression-level-3 Synonymous with -l 6 -b 4096 -r 4 -4, --compression-level-4 Synonymous with -l 8 -b 4096 -M -r 4 -5, --compression-level-5 Synonymous with -l 8 -b 4096 -m -r 5 -6, --compression-level-6 Synonymous with -l 8 -b 4096 -m -r 6 -A tukey(0.5) -A partial_tukey(2) -7, --compression-level-7 Synonymous with -l 12 -b 4096 -m -r 6 -A tukey(0.5) -A partial_tukey(2) -8, --compression-level-8, --best Synonymous with -l 12 -b 4096 -m -r 6 -A tukey(0.5) -A partial_tukey(2) -A punchout_tukey(3) -b, --blocksize=# Specify blocksize in samples -m, --mid-side Try mid-side coding for each frame -M, --adaptive-mid-side Adaptive mid-side coding for all frames -e, --exhaustive-model-search Do exhaustive model search (expensive!) -A, --apodization="function" Window audio data with given the function -l, --max-lpc-order=# Max LPC order; 0 => only fixed predictors -p, --qlp-coeff-precision-search Exhaustively search LP coeff quantization -q, --qlp-coeff-precision=# Specify precision in bits -r, --rice-partition-order=[#,]# Set [min,]max residual partition order format options: --force-raw-format Treat input or output as raw samples --force-aiff-format Force decoding to AIFF format --force-rf64-format Force decoding to RF64 format --force-wave64-format Force decoding to Wave64 format raw format options: --endian={big|little} Set byte order for samples --channels=# Number of channels --bps=# Number of bits per sample --sample-rate=# Sample rate in Hz --sign={signed|unsigned} Sign of samples --input-size=# Size of the raw input in bytes negative options: --no-adaptive-mid-side --no-cued-seekpoints --no-decode-through-errors --no-delete-input-file --no-error-on-compression-fail --no-preserve-modtime --no-keep-foreign-metadata --no-exhaustive-model-search --no-lax --no-mid-side --no-ogg --no-padding --no-qlp-coeff-prec-search --no-replay-gain --no-residual-gnuplot --no-residual-text --no-ignore-chunk-sizes --no-sector-align --no-seektable --no-silent --no-force --no-verify --no-warnings-as-errors