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Top Forums UNIX for Dummies Questions & Answers Problem with use of the ? wildcard in regex substitution. Post 302858119 by ropers on Saturday 28th of September 2013 09:01:03 PM
Old 09-28-2013
Problem with use of the ? wildcard in regex substitution.

I'm trying to use Larry Wall's rename (prename) tool to rename multiple files:

Code:
    $ ls -1
    blar.m4mp3
    BLAH.mpmp3
    bar foo.m4mp3
    foo bar.mpmp3

I'm trying to fix the extensions so they're all .mp3:

Code:
    rename 's/m?mp3/mp3/' *mp3

I expect m?mp3 to match the extensions, and I expect them to be substituted with mp3. But I can't seem to get it to match and work correctly.

What am I doing wrong?

Last edited by Scott; 09-28-2013 at 10:05 PM.. Reason: Code tags
 

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qmp3report(1)							 quelcom man pages						     qmp3report(1)

NAME
qmp3report - report mp3 files and directories SYNOPSIS
qmp3report [option]... file... DESCRIPTION
qmp3report reads mp3 files or directories containing mp3 files and gives information about them. qmp3report can output the reports with plain text or in html format. using the latter format, you can navigate your mp3 directories with a web browser. OPTIONS
-a, --all report all files, not just files with suffix mp3. -A, --show-all implies --show-dirs, --show-files and --summary. show report for files and directories and a summary report. -d, --dirs show a report for every directory containing reported files/directories. note that if option --all is not set, only will be reported those directories containing mp3 files. -f, --files show a report for every reportable file (see --all). -h, --help show a brief help and exit. -H, --html output in html format (default is plain text). -r, --recursive scan directories. -s, --summary show a summary report. -S, --split split report across visited directories. qmp3report leaves in each visited directory a file with the report for that directory, independently of the output format. the name of the report file is the name of the directory with extension .txt or .html depending on the selected output format. -v, --verbose show more detailed info. -V, --version show version and exit. BUGS
variable bit rate (vbr) streams are detected by reading the initial (5) frames in the stream. if their bit rate field differs, the entire stream is read to compute the duration time with accuracy (see manual info for qmp3info). if vbr is not detected, qmp3report reads only the first frame in the stream and calculates the duration supposing that (1) the entire stream is composed by valid frames and (2) all the frames have the same bit rate. this is a fast way to compute the duration of the stream, but it is not exact: there's an error of 0.3% aprox. the htmlize function, which converts file names in a suitable form for html format (ie. replacing spaces with %20), is not bulletproof. tests have been done only with mpeg version 1 layer iii streams, though it may (or not) work with other versions or layers. AUTHOR
dmanye@etse.urv.es http://www.etse.urv.es/~dmanye/quelcom/quelcom.html SEE ALSO
qmp3info(1), qmp3join(1), qmp3cut(1), qmp3check(1) qwavinfo(1), qwavjoin(1), qwavcut(1), qwavsilence(1), qwavfade(1), qwavheaderdump(1) quelcom 0.4.0 february 2001 qmp3report(1)
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