NAME¶
audio_rename - rename an audio file via information got via MP3::Tag.
SYNOPSIS¶
audio_rename -csR -@p "@a/@l/@02n_@t" .
renames all the audio files in this directory and its subdirectories into a
3-level directory structure given by
Artist_Name/Album/Filename, with
the basename of
Filename being the 2-digit track number separated from
the title by underscore; it also transliterates cyrillic, and shortens long
names.
(Due to use of "-@" and double quotes, this command line should work
both with UNIXish and DOSish shells; the other examples can be massaged
likewise.)
(Replacing @02n by "@{mA}@{n0}" (as in the default value of
"-p") may provide more intelligent semantic. See the description of
"-p".
audio_rename -KD *.wav
Reports how it would rename the
*.wav files in this directory according
to the default
-p rule, but without protectiing "funny"
characters. Will not do actual renaming.
audio_rename -sc *.mp3
Rename the
*.mp3 files in this directory according to the default
-p rule, translating cyrillic characters into Latin
"equivalents", shortening the names of long components, and
protecting "funny" characters.
audio_rename -p '%a/%{d0}/%B' -G '*/*.mp3'
Assuming one-level subdirectory structure
dir/filename.ext, finds files
with extension
.mp3, and "sorts" them into a two-level
subdirectory structure; toplevel directory is based on the "artist"
field, the remaing level is preserved.
audio_rename -p '%a/%{d0}/%B' -R .
Likewise, but does not suppose any particular depth of the current directory
structure; only the filename and the most internal directory name are
preserved.
audio_rename -p '%a/%N' -R .
Likewise, but all directory names (inside the current directory) are preserved.
DESCRIPTION¶
The script takes a list of files (or, with
-R option, directories) and
renames the given files (or audio files in the directories) according to the
rules specified through the command line options. File extensions are
preserved (by default).
Some "companion" files (i.e., files with the same basename, and with
an extension from a certain list) may be renamed together with audio files. A
lot of care is taken to make the resulting file names as portable as possible:
e.g., "funny" characters in file names are dumbed down (unless
requested otherwise), long filename components may be shortened to certain
limits.
A care is taken so that renaming will not overwrite existing files; however, on
OSes which allow
rename() to overwrite files, race conditions can ruin
the best intentions. E.g., do not run several "overlapping" rename
procedures simultaneously!
Recognized options¶
General use options:
- -p "TARGET_FILENAME_PATTERN"
- Target file name/basename pattern; is subject to interpolation via
"MP3::Tag" method "interpolate()". Default is
"%{mA}%{n0}_%t"; in simplest cases this uses 2-digit track
number separated from the title by underscore. See "interpolate"
in MP3::Tag for more details.
Here is the explanation of the default value: due to semantic of escapes
"%{mA}" and "%{n0}", if "TPOS" frame (disk
number) is present, it is encoded as a letter, and put before the track
number. If the track number has a form "N1/N2" (meaning track N1
of N2), then N1 is used, and padded by 0s to the width of N2. If
"N2" is not present, padding to width=2 is used.
For example, if "TPOS" is 3/12, and track is "14/173",
then what is prepended to the title is "c014_"; if there is no
"TPOS" frame, and track is "4/8", "4_" is
prepended without any leading 0.
(If you want to modify the semantic of "%{n0}", note that it is
equivalent to "%{n2:%{n0}}%{!n2:%02n}". So while %02{n0} will
ALWAYS 0-pad to at least width=2, the pattern
"%{n2:%{n0}}%{!n2:%03n}" will 0-pad to width=3 in the case N2 is
absent.
- -e ".ext1|.ext2|..."
- "|"-separated list of associated extensions; when renaming
source.mp3 to target.mp3, the similar rename will be done to
files with the same basename, and extensions .ext1, .ext2,
etc. Defaults to ".inf|.tag|.id3".
- -x
- If not present, the pattern of -p is the basename; the extension of
the initial file is appended (as interpolated by %E). If present, the
pattern of -p is the complete file name. Behaviour with non-empty
list of associated extensions is not defined.
The following options have the same meaning as for script "mp3info2"
- -D
- "Dry run": do not rename, just report the calculated
renames.
- -G
- Arguments are glob patterns; expand them.
- -R
- Arguments are directory names, recurse inside using option -E for
choosing audio files via their extension.
- -r
- Regular expression to use when looking for audio files per option
-R. Defaults to "(?i:\.mp3$)": will find files ending in
.mp3 (ignoring the case). Note that this expression is put into a
case-ignoring regular expression, so if you want it to be case-sensitive,
protect it as in "(?-i:REGEXPR)".
- -E "option_letters"
- Controls expansion of escape characters. It should contain the letters of
the command-line options where "\\, \n, \t" are interpolated.
Default is none.
- -@
- Replace "@" by "%" in option values. (May be useful
since -p and -P may have a lot of embedded characters
"%", which may be hard to deal with on some shells, e.g., DOSISH
shells. DOSish shells recognize double quotes, so if one wants
shell-transparent examples of command lines, use -@ and double
quotes.)
- -P "patterns"
- Patterns to parse before application of the rule -p. See mp3info2
for details.
- -C "config_options"
- Configuration options for MP3::Tag. See mp3info2 for details.
File name portability options:
- -s
- Make the components of file names short enough to fit on a CD file system.
Currently this means the restriction to 110 chars (as with "mkisofs
-J --joliet-long", at least of version 2.01a32). The limit may be
modified per "AUDIO_MAX_FILENAME_LEN" environment variable.
Note that "components" are parts separated by a literal character
"/" in the given pattern (not slashes coming from interpolated
strings).
- -c
- Latinize file names (for portability) assuming they are in WinCyrillic
encoding. Needs transliterate_win1251.pm (in
examples/mod/Encode directory of the distribution; put it in the
subdirectory Encode of the script directory).
- -K
- Do not convert "exotic" characters to underscores (those
characters which have a low portability score, so the files will have
problem being moved between systems).
Note that this utility performes very similarly to mp3info2 utility when the
latter one is used with
-p option; only instead of printing the result
of interpolation of
-p, it uses the result as the target file name for
renaming (after some "sanitizing" of the result). (However, the
defaults for "-E" options differ!)
Please take into account that the option
-P is provided for completeness
only. If one needs really complicated parsing rules to deduce the resulting
file name, it is much safer to use mp3info2 utility to set the wanted file
name into some ID3v2 frame (such as "TXXX[wanted-target-name]"), and
then, after checking for errors, use this result similarly to
audio_rename -p "%{TXXX[wanted-target-name]]}" -R .
After rename, one can delete this frame from the resulting files.
If you want to be absolutely error-prone, preserve the initial file name inside
the files by doing something similar to
mp3info2 -@F "TXXX[orig-fname]=@A" -R .
before the rename. If worst comes to worst (but no race conditions happend, so
files are not overwritten), one should be able to restore the status quo by
running
audio_rename -@p "@A" files_or_directories_list
(giving
-R option if needed).
POSSIBLE PROBLEMS¶
With
-R option, there might be situations when the scan of subdirectories
first finds a source file in some directory, renames it, then continues the
scan of other subdirectories, and will find the target file, so will try to
rename it again.
In practice, I do not recall ever encountering this situation; if the target
file name depends only on the contents of the file, and not its name, then the
second rename will be tautological, so not visible.
AUTHOR¶
Ilya Zakharevich <cpan@ilyaz.org>.
SEE ALSO¶
MP3::Tag, MP3::Tag::ParseData, mp3info2